Jetpack Compose phases | Android Developers

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devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>App layout</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/basics" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/basics" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/basics" ><span class="devsite-nav-text" tooltip>Layout basics</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/modifiers" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/modifiers" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/modifiers" ><span class="devsite-nav-text" tooltip>Modifiers</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/constraints-modifiers" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/constraints-modifiers" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/constraints-modifiers" ><span class="devsite-nav-text" tooltip>Constraints and modifier order</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/custom-modifiers" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/custom-modifiers" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/custom-modifiers" ><span class="devsite-nav-text" tooltip>Custom modifiers</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/modifiers-list" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/modifiers-list" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/modifiers-list" ><span class="devsite-nav-text" tooltip>List of modifiers</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/pager" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/pager" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/pager" ><span class="devsite-nav-text" tooltip>Pager</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/flow" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/flow" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/flow" ><span class="devsite-nav-text" tooltip>Flow layouts</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/custom" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/custom" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/custom" ><span class="devsite-nav-text" tooltip>Custom layouts</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Adaptive layouts</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/adaptive" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/adaptive" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/adaptive" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/adaptive/canonical-layouts" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/adaptive/canonical-layouts" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/adaptive/canonical-layouts" ><span class="devsite-nav-text" tooltip>Canonical layouts</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/adaptive/support-different-screen-sizes" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/adaptive/support-different-screen-sizes" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/adaptive/support-different-screen-sizes" ><span class="devsite-nav-text" tooltip>Support different screen sizes</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/adaptive/use-window-size-classes" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/adaptive/use-window-size-classes" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/adaptive/use-window-size-classes" ><span class="devsite-nav-text" tooltip>Use window size classes</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/adaptive/support-multi-window-mode" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/adaptive/support-multi-window-mode" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/adaptive/support-multi-window-mode" ><span class="devsite-nav-text" tooltip>Support multi-window mode</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/adaptive/support-desktop-windowing" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/adaptive/support-desktop-windowing" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/adaptive/support-desktop-windowing" ><span class="devsite-nav-text" tooltip>Support desktop windowing</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/adaptive/build-adaptive-navigation" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/adaptive/build-adaptive-navigation" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/adaptive/build-adaptive-navigation" ><span class="devsite-nav-text" tooltip>Build adaptive navigation</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/adaptive/list-detail" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/adaptive/list-detail" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/adaptive/list-detail" ><span class="devsite-nav-text" tooltip>Build a list-detail layout</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/adaptive/build-a-supporting-pane-layout" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/adaptive/build-a-supporting-pane-layout" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/adaptive/build-a-supporting-pane-layout" ><span class="devsite-nav-text" tooltip>Build a supporting pane layout</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/adaptive/adaptive-dos-and-donts" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/adaptive/adaptive-dos-and-donts" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/adaptive/adaptive-dos-and-donts" ><span class="devsite-nav-text" tooltip>Adaptive do's and don'ts</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Foldables</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/adaptive/foldables/learn-about-foldables" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/adaptive/foldables/learn-about-foldables" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/adaptive/foldables/learn-about-foldables" ><span class="devsite-nav-text" tooltip>Learn about foldables</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/adaptive/foldables/make-your-app-fold-aware" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/adaptive/foldables/make-your-app-fold-aware" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/adaptive/foldables/make-your-app-fold-aware" ><span class="devsite-nav-text" tooltip>Make your app fold-aware</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/adaptive/foldables/support-foldable-display-modes" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/adaptive/foldables/support-foldable-display-modes" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/adaptive/foldables/support-foldable-display-modes" ><span class="devsite-nav-text" tooltip>Support foldable display modes</span></a></li></ul></div></li></ul></div></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/alignment-lines" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/alignment-lines" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/alignment-lines" ><span class="devsite-nav-text" tooltip>Alignment lines</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/intrinsic-measurements" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/intrinsic-measurements" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/intrinsic-measurements" ><span class="devsite-nav-text" tooltip>Intrinsic measurements</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/constraintlayout" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/constraintlayout" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/constraintlayout" ><span class="devsite-nav-text" tooltip>ConstraintLayout</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-accordion"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Components</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/components" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>App bars</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/components/app-bars" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/app-bars" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/app-bars" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/app-bars-navigate" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/app-bars-navigate" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/app-bars-navigate" ><span class="devsite-nav-text" tooltip>Navigate from top app bar</span></a></li></ul></div></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/badges" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/badges" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/badges" ><span class="devsite-nav-text" tooltip>Badges</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Bottom sheets</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/components/bottom-sheets" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/bottom-sheets" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/bottom-sheets" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/bottom-sheets-partial" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/bottom-sheets-partial" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/bottom-sheets-partial" ><span class="devsite-nav-text" tooltip>Partial bottom sheet</span></a></li></ul></div></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/button" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/button" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/button" ><span class="devsite-nav-text" tooltip>Button</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/card" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/card" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/card" ><span class="devsite-nav-text" tooltip>Card</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/checkbox" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/checkbox" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/checkbox" ><span class="devsite-nav-text" tooltip>Checkbox</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/chip" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/chip" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/chip" ><span class="devsite-nav-text" tooltip>Chip</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/datepickers" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/datepickers" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/datepickers" ><span class="devsite-nav-text" tooltip>Date pickers</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/dialog" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/dialog" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/dialog" ><span class="devsite-nav-text" tooltip>Dialog</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/divider" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/divider" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/divider" ><span class="devsite-nav-text" tooltip>Divider</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/fab" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/fab" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/fab" ><span class="devsite-nav-text" tooltip>Floating action button</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/lists" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/lists" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/lists" ><span class="devsite-nav-text" tooltip>Lists and grids</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/drawer" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/drawer" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/drawer" ><span class="devsite-nav-text" tooltip>Navigation drawer</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/progress" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/progress" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/progress" ><span class="devsite-nav-text" tooltip>Progress indicators</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/resources" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/resources" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/resources" ><span class="devsite-nav-text" tooltip>Resources</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/scaffold" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/scaffold" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/scaffold" ><span class="devsite-nav-text" tooltip>Scaffold</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/slider" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/slider" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/slider" ><span class="devsite-nav-text" tooltip>Slider</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/snackbar" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/snackbar" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/snackbar" ><span class="devsite-nav-text" tooltip>Snackbar</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/switch" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/switch" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/switch" ><span class="devsite-nav-text" tooltip>Switch</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Time pickers</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/components/time-pickers" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/time-pickers" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/time-pickers" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/components/time-pickers-dialogs" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/components/time-pickers-dialogs" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/components/time-pickers-dialogs" ><span class="devsite-nav-text" tooltip>Time picker dialogs</span></a></li></ul></div></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-accordion"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Theming</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/designsystems" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/designsystems" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/designsystems" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/designsystems/material3" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/designsystems/material3" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/designsystems/material3" ><span class="devsite-nav-text" tooltip>Material Design 3</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/designsystems/material2-material3" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/designsystems/material2-material3" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/designsystems/material2-material3" ><span class="devsite-nav-text" tooltip>Migrate from Material 2 to Material 3</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/designsystems/material" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/designsystems/material" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/designsystems/material" ><span class="devsite-nav-text" tooltip>Material Design 2</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/designsystems/custom" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/designsystems/custom" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/designsystems/custom" ><span class="devsite-nav-text" tooltip>Custom theming</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/designsystems/anatomy" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/designsystems/anatomy" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/designsystems/anatomy" ><span class="devsite-nav-text" tooltip>Anatomy of a theme</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/designsystems/views-to-compose" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/designsystems/views-to-compose" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/designsystems/views-to-compose" ><span class="devsite-nav-text" tooltip>Migrating XML themes to Compose</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-accordion"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Text and typography</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/text" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/text" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/text" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Display and style text</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/text/display-text" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/text/display-text" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/text/display-text" ><span class="devsite-nav-text" tooltip>Display text from resource</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/text/style-text" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/text/style-text" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/text/style-text" ><span class="devsite-nav-text" tooltip>Style text</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/text/style-paragraph" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/text/style-paragraph" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/text/style-paragraph" ><span class="devsite-nav-text" tooltip>Style paragraph</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/text/configure-layout" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/text/configure-layout" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/text/configure-layout" ><span class="devsite-nav-text" tooltip>Configure text layout</span></a></li></ul></div></li><li class="devsite-nav-item"><a href="/develop/ui/compose/text/user-input" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/text/user-input" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/text/user-input" ><span class="devsite-nav-text" tooltip>Handle user input</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/text/user-interactions" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/text/user-interactions" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/text/user-interactions" ><span class="devsite-nav-text" tooltip>Enable user interactions</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/text/fonts" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/text/fonts" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/text/fonts" ><span class="devsite-nav-text" tooltip>Work with fonts</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/text/emoji" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/text/emoji" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/text/emoji" ><span class="devsite-nav-text" tooltip>Display emoji</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-accordion"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Images and graphics</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/graphics" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/graphics" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/graphics" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Images</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/graphics/images" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/graphics/images" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/graphics/images" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/graphics/images/loading" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/graphics/images/loading" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/graphics/images/loading" ><span class="devsite-nav-text" tooltip>Loading images</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/graphics/images/compare" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/graphics/images/compare" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/graphics/images/compare" ><span class="devsite-nav-text" tooltip>ImageBitmap vs ImageVector</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/graphics/images/material" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/graphics/images/material" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/graphics/images/material" ><span class="devsite-nav-text" tooltip>Material icons</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/graphics/images/customize" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/graphics/images/customize" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/graphics/images/customize" ><span class="devsite-nav-text" tooltip>Customize an image</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/graphics/images/custompainter" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/graphics/images/custompainter" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/graphics/images/custompainter" ><span class="devsite-nav-text" tooltip>Custom painter</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/graphics/images/optimization" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/graphics/images/optimization" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/graphics/images/optimization" ><span class="devsite-nav-text" tooltip>Optimizing performance</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Graphics</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/graphics/draw/overview" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/graphics/draw/overview" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/graphics/draw/overview" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/graphics/draw/modifiers" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/graphics/draw/modifiers" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/graphics/draw/modifiers" ><span class="devsite-nav-text" tooltip>Graphics Modifiers</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/graphics/draw/brush" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/graphics/draw/brush" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/graphics/draw/brush" ><span class="devsite-nav-text" tooltip>Brush</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/graphics/draw/shapes" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/graphics/draw/shapes" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/graphics/draw/shapes" ><span class="devsite-nav-text" tooltip>Shapes</span></a></li></ul></div></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-accordion"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Animation</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/introduction" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/introduction" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/introduction" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/choose-api" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/choose-api" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/choose-api" ><span class="devsite-nav-text" tooltip>Choose an animation API</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/quick-guide" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/quick-guide" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/quick-guide" ><span class="devsite-nav-text" tooltip>Quick guide</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/composables-modifiers" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/composables-modifiers" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/composables-modifiers" ><span class="devsite-nav-text" tooltip>Animation modifiers and composables</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/value-based" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/value-based" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/value-based" ><span class="devsite-nav-text" tooltip>Value-based animations</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/vectors" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/vectors" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/vectors" ><span class="devsite-nav-text" tooltip>Animated vector images</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/advanced" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/advanced" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/advanced" ><span class="devsite-nav-text" tooltip>Advanced animation example</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/customize" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/customize" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/customize" ><span class="devsite-nav-text" tooltip>Customize animations</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Shared elements</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/shared-elements" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/shared-elements" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/shared-elements" ><span class="devsite-nav-text" tooltip>Introduction</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/shared-elements/customize" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/shared-elements/customize" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/shared-elements/customize" ><span class="devsite-nav-text" tooltip>Customize</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/shared-elements/common-use-cases" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/shared-elements/common-use-cases" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/shared-elements/common-use-cases" ><span class="devsite-nav-text" tooltip>Common use cases</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/shared-elements/navigation" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/shared-elements/navigation" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/shared-elements/navigation" ><span class="devsite-nav-text" tooltip>With navigation</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/shared-elements/additional-samples" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/shared-elements/additional-samples" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/shared-elements/additional-samples" ><span class="devsite-nav-text" tooltip>Additional samples</span></a></li></ul></div></li><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/testing" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/testing" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/testing" ><span class="devsite-nav-text" tooltip>Test animations</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/tooling" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/tooling" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/tooling" ><span class="devsite-nav-text" tooltip>Tools</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/animation/resources" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/animation/resources" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/animation/resources" ><span class="devsite-nav-text" tooltip>Additional resources</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-accordion"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Accessibility</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/accessibility" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/accessibility" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/accessibility" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/accessibility/key-steps" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/accessibility/key-steps" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/accessibility/key-steps" ><span class="devsite-nav-text" tooltip>Key steps</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/accessibility/semantics" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/accessibility/semantics" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/accessibility/semantics" ><span class="devsite-nav-text" tooltip>Semantics</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/accessibility/traversal" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/accessibility/traversal" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/accessibility/traversal" ><span class="devsite-nav-text" tooltip>Control traversal order</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/accessibility/testing" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/accessibility/testing" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/accessibility/testing" ><span class="devsite-nav-text" tooltip>Testing</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-accordion"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Touch and input</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Pointer input</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/pointer-input" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/pointer-input" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/pointer-input" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/pointer-input/understand-gestures" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/pointer-input/understand-gestures" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/pointer-input/understand-gestures" ><span class="devsite-nav-text" tooltip>Understand gestures</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/pointer-input/tap-and-press" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/pointer-input/tap-and-press" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/pointer-input/tap-and-press" ><span class="devsite-nav-text" tooltip>Tap and press</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/pointer-input/scroll" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/pointer-input/scroll" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/pointer-input/scroll" ><span class="devsite-nav-text" tooltip>Scroll</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/pointer-input/drag-swipe-fling" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/pointer-input/drag-swipe-fling" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/pointer-input/drag-swipe-fling" ><span class="devsite-nav-text" tooltip>Drag, swipe, and fling</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/pointer-input/multi-touch" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/pointer-input/multi-touch" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/pointer-input/multi-touch" ><span class="devsite-nav-text" tooltip>Multi-touch gestures</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Keyboard input</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/keyboard-input/commands" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/keyboard-input/commands" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/keyboard-input/commands" ><span class="devsite-nav-text" tooltip>Handle keyboard actions</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/keyboard-input/keyboard-shortcuts-helper" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/keyboard-input/keyboard-shortcuts-helper" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/keyboard-input/keyboard-shortcuts-helper" ><span class="devsite-nav-text" tooltip>Keyboard Shortcuts Helper</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Focus</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/focus" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/focus" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/focus" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/focus/change-focus-traversal-order" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/focus/change-focus-traversal-order" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/focus/change-focus-traversal-order" ><span class="devsite-nav-text" tooltip>Change focus traversal order</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/focus/change-focus-behavior" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/focus/change-focus-behavior" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/focus/change-focus-behavior" ><span class="devsite-nav-text" tooltip>Change focus behavior</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/focus/react-to-focus" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/focus/react-to-focus" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/focus/react-to-focus" ><span class="devsite-nav-text" tooltip>React to focus</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>User interactions</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/user-interactions/handling-interactions" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/user-interactions/handling-interactions" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/user-interactions/handling-interactions" ><span class="devsite-nav-text" tooltip>Handling interactions</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/user-interactions/migrate-indication-ripple" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/user-interactions/migrate-indication-ripple" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/user-interactions/migrate-indication-ripple" ><span class="devsite-nav-text" tooltip>Migrate to Indication and Ripple APIs</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/user-interactions/drag-and-drop" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/user-interactions/drag-and-drop" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/user-interactions/drag-and-drop" ><span class="devsite-nav-text" tooltip>Drag and Drop</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Stylus input</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/stylus-input" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/stylus-input" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/stylus-input" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/stylus-input/stylus-input-in-text-fields" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/stylus-input/stylus-input-in-text-fields" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/stylus-input/stylus-input-in-text-fields" ><span class="devsite-nav-text" tooltip>Stylus input in text fields</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/stylus-input/advanced-stylus-features" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/stylus-input/advanced-stylus-features" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/stylus-input/advanced-stylus-features" ><span class="devsite-nav-text" tooltip>Advanced stylus features</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/stylus-input/create-a-note-taking-app" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/stylus-input/create-a-note-taking-app" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/stylus-input/create-a-note-taking-app" ><span class="devsite-nav-text" tooltip>Note-taking apps</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Add inking to your app with the Ink API</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/stylus-input/about-ink-api" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/stylus-input/about-ink-api" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/stylus-input/about-ink-api" ><span class="devsite-nav-text" tooltip>About the Ink API</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/stylus-input/ink-api-setup" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/stylus-input/ink-api-setup" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/stylus-input/ink-api-setup" ><span class="devsite-nav-text" tooltip>Setup</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/stylus-input/ink-api-modules" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/stylus-input/ink-api-modules" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/stylus-input/ink-api-modules" ><span class="devsite-nav-text" tooltip>Pick your module</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/stylus-input/ink-api-draw-stroke" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/stylus-input/ink-api-draw-stroke" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/stylus-input/ink-api-draw-stroke" ><span class="devsite-nav-text" tooltip>Draw a stroke</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/stylus-input/ink-api-brush-apis" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/stylus-input/ink-api-brush-apis" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/stylus-input/ink-api-brush-apis" ><span class="devsite-nav-text" tooltip>Define your brushes</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/stylus-input/ink-api-geometry-apis" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/stylus-input/ink-api-geometry-apis" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/stylus-input/ink-api-geometry-apis" ><span class="devsite-nav-text" tooltip>Create interactive tools with the Geometry APIs</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/stylus-input/ink-api-state-preservation" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/stylus-input/ink-api-state-preservation" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/stylus-input/ink-api-state-preservation" ><span class="devsite-nav-text" tooltip>State preservation and persistent storage</span></a></li></ul></div></li></ul></div></li><li class="devsite-nav-item"><a href="/develop/ui/compose/touch-input/copy-and-paste" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/touch-input/copy-and-paste" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/touch-input/copy-and-paste" ><span class="devsite-nav-text" tooltip>Copy and paste</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-accordion"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Performance</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/performance" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/performance" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/performance" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/performance/phases" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/performance/phases" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/performance/phases" ><span class="devsite-nav-text" tooltip>Phases</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/performance/baseline-profiles" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/performance/baseline-profiles" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/performance/baseline-profiles" ><span class="devsite-nav-text" tooltip>Baseline profiles</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Stability</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/performance/stability" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/performance/stability" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/performance/stability" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/performance/stability/diagnose" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/performance/stability/diagnose" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/performance/stability/diagnose" ><span class="devsite-nav-text" tooltip>Diagnose stability issues</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/performance/stability/fix" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/performance/stability/fix" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/performance/stability/fix" ><span class="devsite-nav-text" tooltip>Fix stability issues</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/performance/stability/strongskipping" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/performance/stability/strongskipping" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/performance/stability/strongskipping" ><span class="devsite-nav-text" tooltip>Strong skipping</span></a></li></ul></div></li><li class="devsite-nav-item"><a href="/develop/ui/compose/performance/tooling" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/performance/tooling" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/performance/tooling" ><span class="devsite-nav-text" tooltip>Tools</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/performance/bestpractices" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/performance/bestpractices" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/performance/bestpractices" ><span class="devsite-nav-text" tooltip>Best practices</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-accordion"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Style guidelines</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/api-guidelines" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/api-guidelines" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/api-guidelines" ><span class="devsite-nav-text" tooltip>Compose API guidelines</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/kotlin" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/kotlin" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/kotlin" ><span class="devsite-nav-text" tooltip>Kotlin for Compose</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-accordion"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>UI testing</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/testing" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/testing" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/testing" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/testing/testing-cheatsheet" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/testing/testing-cheatsheet" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/testing/testing-cheatsheet" ><span class="devsite-nav-text" tooltip>Cheatsheet</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/testing/semantics" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/testing/semantics" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/testing/semantics" ><span class="devsite-nav-text" tooltip>Semantics</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/testing/apis" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/testing/apis" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/testing/apis" ><span class="devsite-nav-text" tooltip>Testing APIs</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/testing/synchronization" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/testing/synchronization" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/testing/synchronization" ><span class="devsite-nav-text" tooltip>Synchronize tests</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/testing/interoperability" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/testing/interoperability" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/testing/interoperability" ><span class="devsite-nav-text" tooltip>Interoperability</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/testing/common-patterns" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/testing/common-patterns" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/testing/common-patterns" ><span class="devsite-nav-text" tooltip>Common patterns</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/testing/debug" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/testing/debug" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/testing/debug" ><span class="devsite-nav-text" tooltip>Debug tests</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-accordion"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Migrate to Compose</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/migrate" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/migrate" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/migrate" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/migrate/strategy" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/migrate/strategy" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/migrate/strategy" ><span class="devsite-nav-text" tooltip>Migration strategy</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Interoperability APIs</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/migrate/interoperability-apis" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/migrate/interoperability-apis" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/migrate/interoperability-apis" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/migrate/interoperability-apis/compose-in-views" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/migrate/interoperability-apis/compose-in-views" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/migrate/interoperability-apis/compose-in-views" ><span class="devsite-nav-text" tooltip>Using Compose in Views</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/migrate/interoperability-apis/views-in-compose" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/migrate/interoperability-apis/views-in-compose" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/migrate/interoperability-apis/views-in-compose" ><span class="devsite-nav-text" tooltip>Using Views in Compose</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Common migration scenarios</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/migrate/migration-scenarios/recycler-view" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/migrate/migration-scenarios/recycler-view" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/migrate/migration-scenarios/recycler-view" ><span class="devsite-nav-text" tooltip>Migrate RecyclerView to Compose</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/migrate/migration-scenarios/coordinator-layout" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/migrate/migration-scenarios/coordinator-layout" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/migrate/migration-scenarios/coordinator-layout" ><span class="devsite-nav-text" tooltip>Migrate CoordinatorLayout to Compose</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/migrate/migration-scenarios/navigation" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/migrate/migration-scenarios/navigation" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/migrate/migration-scenarios/navigation" ><span class="devsite-nav-text" tooltip>Migrate Jetpack Navigation to Navigation Compose</span></a></li></ul></div></li><li class="devsite-nav-item"><a href="/develop/ui/compose/migrate/other-considerations" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/migrate/other-considerations" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/migrate/other-considerations" ><span class="devsite-nav-text" tooltip>Other considerations</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/adopt/for-large-teams" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/adopt/for-large-teams" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/adopt/for-large-teams" ><span class="devsite-nav-text" tooltip>Adopt Compose for teams</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/libraries" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/libraries" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/libraries" ><span class="devsite-nav-text" tooltip>Compose and other libraries</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/migrate/compare-metrics" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/migrate/compare-metrics" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/migrate/compare-metrics" ><span class="devsite-nav-text" tooltip>Compare Compose and View metrics</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-accordion"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Tools</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Design</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/previews" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/previews" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/previews" ><span class="devsite-nav-text" tooltip>Preview your UI</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/animation-preview" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/animation-preview" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/animation-preview" ><span class="devsite-nav-text" tooltip>Preview and debug animations</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Develop</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/iterative-development" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/iterative-development" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/iterative-development" ><span class="devsite-nav-text" tooltip>Develop code iteratively</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/editor-actions" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/editor-actions" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/editor-actions" ><span class="devsite-nav-text" tooltip>Editor actions</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Debug</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/layout-inspector" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/layout-inspector" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/layout-inspector" ><span class="devsite-nav-text" tooltip>Inspect your layout</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/tracing" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/tracing" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/tracing" ><span class="devsite-nav-text" tooltip>Trace app performance</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Relay designer and developer tooling</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/install-relay" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/install-relay" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/install-relay" ><span class="devsite-nav-text" tooltip>Install Relay</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/android-project-setup" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/android-project-setup" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/android-project-setup" ><span class="devsite-nav-text" tooltip>Set up your Android project</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Basic tutorial</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/basic-tutorial" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/basic-tutorial" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/basic-tutorial" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/create-ui-package-in-figma" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/create-ui-package-in-figma" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/create-ui-package-in-figma" ><span class="devsite-nav-text" tooltip>Create UI Package in Figma</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/convert-designs-android-studio" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/convert-designs-android-studio" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/convert-designs-android-studio" ><span class="devsite-nav-text" tooltip>Convert the designs to code in Android Studio</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/design-updates" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/design-updates" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/design-updates" ><span class="devsite-nav-text" tooltip>Make and propagate design updates</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/content-parameters" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/content-parameters" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/content-parameters" ><span class="devsite-nav-text" tooltip>Content parameters</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Advanced tutorial</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/advanced-tutorial" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/advanced-tutorial" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/advanced-tutorial" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/design-variants" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/design-variants" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/design-variants" ><span class="devsite-nav-text" tooltip>Handling design variants</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/content-parameters-advanced" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/content-parameters-advanced" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/content-parameters-advanced" ><span class="devsite-nav-text" tooltip>Content parameters</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/interaction-handlers" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/interaction-handlers" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/interaction-handlers" ><span class="devsite-nav-text" tooltip>Add interaction handlers to designs</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Relay workflow</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/relay-workflow" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/relay-workflow" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/relay-workflow" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/create-ui-packages" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/create-ui-packages" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/create-ui-packages" ><span class="devsite-nav-text" tooltip>Create UI Packages</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/add-parameters" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/add-parameters" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/add-parameters" ><span class="devsite-nav-text" tooltip>Add parameters</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/check-errors" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/check-errors" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/check-errors" ><span class="devsite-nav-text" tooltip>Check errors</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/share-ui-packages" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/share-ui-packages" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/share-ui-packages" ><span class="devsite-nav-text" tooltip>Share UI Packages</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/android-studio-workflow" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/android-studio-workflow" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/android-studio-workflow" ><span class="devsite-nav-text" tooltip>Android Studio workflow</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/understand-ui-package" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/understand-ui-package" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/understand-ui-package" ><span class="devsite-nav-text" tooltip>Understand UI Package & generated code</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/figma-devmode" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/figma-devmode" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/figma-devmode" ><span class="devsite-nav-text" tooltip>Figma DevMode</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Design-to-code translation details</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/figma-component-properties" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/figma-component-properties" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/figma-component-properties" ><span class="devsite-nav-text" tooltip>Figma Component Properties</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/children-parameters" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/children-parameters" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/children-parameters" ><span class="devsite-nav-text" tooltip>Children parameters</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/nested-package-instances" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/nested-package-instances" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/nested-package-instances" ><span class="devsite-nav-text" tooltip>Nested package instances</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/vector-graphics" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/vector-graphics" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/vector-graphics" ><span class="devsite-nav-text" tooltip>Vector graphics</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/multiple-styles-in-text" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/multiple-styles-in-text" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/multiple-styles-in-text" ><span class="devsite-nav-text" tooltip>Multiple styles in text</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/absolute-positioning" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/absolute-positioning" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/absolute-positioning" ><span class="devsite-nav-text" tooltip>Absolute positioning within auto layout</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/fill-color" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/fill-color" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/fill-color" ><span class="devsite-nav-text" tooltip>Fill color</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/effects" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/effects" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/effects" ><span class="devsite-nav-text" tooltip>Effects</span></a></li></ul></div></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/limitations-and-troubleshooting" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/limitations-and-troubleshooting" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/limitations-and-troubleshooting" ><span class="devsite-nav-text" tooltip>Limitations and troubleshooting</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Experimental features</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/mapping-styles-to-compose-theme" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/mapping-styles-to-compose-theme" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/mapping-styles-to-compose-theme" ><span class="devsite-nav-text" tooltip>Mapping styles to Compose theme</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/mapping-components-to-existing-code" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/mapping-components-to-existing-code" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/mapping-components-to-existing-code" ><span class="devsite-nav-text" tooltip>Mapping components to existing code</span></a></li></ul></div></li><li class="devsite-nav-item"><a href="/develop/ui/compose/tooling/relay/releases" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/tooling/relay/releases" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/tooling/relay/releases" ><span class="devsite-nav-text" tooltip>Releases</span></a></li></ul></div></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-accordion"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Leverage system capabilities</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/layouts/insets" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/layouts/insets" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/layouts/insets" ><span class="devsite-nav-text" tooltip>Window Insets</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/system/cutouts" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/system/cutouts" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/system/cutouts" ><span class="devsite-nav-text" tooltip>Cutouts</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/system/picture-in-picture" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/system/picture-in-picture" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/system/picture-in-picture" ><span class="devsite-nav-text" tooltip>Picture-in-picture</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-accordion"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Create widgets</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/develop/ui/compose/glance" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/glance" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/glance" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/glance/setup" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/glance/setup" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/glance/setup" ><span class="devsite-nav-text" tooltip>Glance setup</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/glance/create-app-widget" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/glance/create-app-widget" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/glance/create-app-widget" ><span class="devsite-nav-text" tooltip>Create an app widget with Glance</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/glance/error-handling" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/glance/error-handling" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/glance/error-handling" ><span class="devsite-nav-text" tooltip>Handle errors with Glance</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/glance/testing" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/glance/testing" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/glance/testing" ><span class="devsite-nav-text" tooltip>Unit testing with Glance</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/glance/user-interaction" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/glance/user-interaction" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/glance/user-interaction" ><span class="devsite-nav-text" tooltip>Handle user interaction with Glance</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/glance/glance-app-widget" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/glance/glance-app-widget" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/glance/glance-app-widget" ><span class="devsite-nav-text" tooltip>Manage and update GlanceAppWidget</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/glance/build-ui" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/glance/build-ui" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/glance/build-ui" ><span class="devsite-nav-text" tooltip>Build UI with Glance</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/glance/theme" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/glance/theme" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/glance/theme" ><span class="devsite-nav-text" tooltip>Implement a Glance theme</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/glance/interoperability" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/glance/interoperability" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/glance/interoperability" ><span class="devsite-nav-text" tooltip>Glance interoperability</span></a></li><li class="devsite-nav-item"><a href="/develop/ui/compose/glance/additional-resources" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /develop/ui/compose/glance/additional-resources" track-type="bookNav" track-name="click" track-metadata-eventdetail="/develop/ui/compose/glance/additional-resources" ><span class="devsite-nav-text" tooltip>Additional resources</span></a></li></ul></div></li> </ul> <ul class="devsite-nav-list" menu="Essentials" aria-label="Side menu" hidden> <li class="devsite-nav-item devsite-nav-heading"> <span class="devsite-nav-title" tooltip > <span class="devsite-nav-text" tooltip > Gemini in Android Studio </span> </span> </li> <li class="devsite-nav-item"> <a href="/gemini-in-android" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Learn more" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Learn more </span> </a> </li> <li class="devsite-nav-item"> <a href="/studio" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Get Android Studio" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Get Android Studio </span> </a> </li> <li class="devsite-nav-item devsite-nav-heading"> <span class="devsite-nav-title" tooltip > <span class="devsite-nav-text" tooltip > Get started </span> </span> </li> <li class="devsite-nav-item"> <a href="/get-started/overview" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Hello world" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Hello world </span> </a> </li> <li class="devsite-nav-item"> <a href="/courses" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Training courses" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Training courses </span> </a> </li> <li class="devsite-nav-item"> <a href="/get-started/codelabs" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Tutorials" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Tutorials </span> </a> </li> <li class="devsite-nav-item"> <a href="/kotlin" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Kotlin for Android" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Kotlin for Android </span> </a> </li> <li class="devsite-nav-item"> <a href="https://play.google.com/console/about/guides/monetize/" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Monetization with Play ↗️" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Monetization with Play ↗️ </span> </a> </li> <li class="devsite-nav-item devsite-nav-heading"> <span class="devsite-nav-title" tooltip > <span class="devsite-nav-text" tooltip > Extend by device </span> </span> </li> <li class="devsite-nav-item"> <a href="/adaptive-apps" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Adaptive apps" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Adaptive apps </span> </a> </li> <li class="devsite-nav-item"> <a href="/wear" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Wear OS" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Wear OS </span> </a> </li> <li class="devsite-nav-item"> <a href="/cars" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Android for Cars" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Android for Cars </span> </a> </li> <li class="devsite-nav-item"> <a href="/tv" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Android TV" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Android TV </span> </a> </li> <li class="devsite-nav-item"> <a href="/chrome-os" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: ChromeOS" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > ChromeOS </span> </a> </li> <li class="devsite-nav-item"> <a href="/multi-device-development" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Cross-device SDK" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Cross-device SDK </span> </a> </li> <li class="devsite-nav-item devsite-nav-heading"> <span class="devsite-nav-title" tooltip > <span class="devsite-nav-text" tooltip > Build by category </span> </span> </li> <li class="devsite-nav-item"> <a href="/games" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Games" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Games </span> </a> </li> <li class="devsite-nav-item"> <a href="/media" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Camera & Media" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Camera & Media </span> </a> </li> <li class="devsite-nav-item"> <a href="/social-and-messaging" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Social & messaging" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Social & messaging </span> </a> </li> <li class="devsite-nav-item"> <a href="/health-and-fitness" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Health & Fitness" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Health & Fitness </span> </a> </li> <li class="devsite-nav-item"> <a href="/productivity" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Productivity" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Productivity </span> </a> </li> <li class="devsite-nav-item"> <a href="/work/overview" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Enterprise apps" track-type="navMenu" track-metadata-eventDetail="globalMenu" 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tooltip > <span class="devsite-nav-text" tooltip > Architecture </span> </span> </li> <li class="devsite-nav-item"> <a href="/topic/architecture/intro" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Introduction" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Introduction </span> </a> </li> <li class="devsite-nav-item"> <a href="/topic/libraries/view-binding" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Libraries" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Libraries </span> </a> </li> <li class="devsite-nav-item"> <a href="/guide/navigation/navigation-principles" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: 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</devsite-thumb-rating> </div> <h1 class="devsite-page-title" tabindex="-1"> Jetpack Compose phases </h1> <devsite-feature-tooltip ack-key="AckCollectionsBookmarkTooltipDismiss" analytics-category="Site-Wide Custom Events" analytics-action-show="Callout Profile displayed" analytics-action-close="Callout Profile dismissed" analytics-label="Create Collection Callout" class="devsite-page-bookmark-tooltip nocontent" dismiss-button="true" id="devsite-collections-dropdown" dismiss-button-text="Dismiss" close-button-text="Got it"> <devsite-bookmark></devsite-bookmark> <span slot="popout-heading"> Stay organized with collections </span> <span slot="popout-contents"> Save and categorize content based on your preferences. </span> </devsite-feature-tooltip> <div class="devsite-page-title-meta"><devsite-view-release-notes></devsite-view-release-notes></div> <devsite-toc class="devsite-nav" depth="2" devsite-toc-embedded > </devsite-toc> <devsite-recommendations-dropdown class="nocontent"></devsite-recommendations-dropdown> <div class="devsite-article-body clearfix "> <div class="video-wrapper"> <iframe class="devsite-embedded-youtube-video" data-video-id="0yK7KoruhSM" data-autohide="1" data-showinfo="0" allowfullscreen> </iframe> </div> <p>Like most other UI toolkits, Compose renders a frame through several distinct <em>phases</em>. If we look at the Android View system, it has three main phases: measure, layout, and drawing. Compose is very similar but has an important additional phase called <em>composition</em> at the start.</p> <p>Composition is described across our Compose docs, including <a href="/develop/ui/compose/mental-model">Thinking in Compose</a> and <a href="/develop/ui/compose/state">State and Jetpack Compose</a>.</p> <h2 id="3-phases" data-text="The three phases of a frame" tabindex="-1">The three phases of a frame</h2> <p>Compose has three main phases:</p> <ol> <li><strong>Composition</strong>: <em>What</em> UI to show. Compose runs composable functions and creates a description of your UI.</li> <li><strong>Layout</strong>: <em>Where</em> to place UI. This phase consists of two steps: measurement and placement. Layout elements measure and place themselves and any child elements in 2D coordinates, for each node in the layout tree.</li> <li><strong>Drawing</strong>: <em>How</em> it renders. UI elements draw into a Canvas, usually a device screen.</li> </ol> <figure id = "image-1"> <img src="/static/develop/ui/compose/images/compose-phases.png" width = "100%" alt = "An image of the three phases in which Compose transforms data into UI (in order, data, composition, layout, drawing, UI)."> <figcaption><b>Figure 1.</b> The three phases in which Compose transforms data into UI.</figcaption> </figure> <p>The order of these phases is generally the same, allowing data to flow in one direction from composition to layout to drawing to produce a frame (also known as <a href="/develop/ui/compose/architecture#udf">unidirectional data flow</a>). <a href="/develop/ui/compose/layouts/basics#constraints"><code translate="no" dir="ltr">BoxWithConstraints</code></a> and <a href="/develop/ui/compose/lists#lazy"><code translate="no" dir="ltr">LazyColumn</code> and <code translate="no" dir="ltr">LazyRow</code></a> are notable exceptions, where the composition of its children depends on the parent's layout phase.</p> <p>You can safely assume that these three phases happen virtually for every frame, but for the sake of performance, Compose avoids repeating work that would compute the same results from the same inputs in all of these phases. Compose <a href="/develop/ui/compose/mental-model#skips">skips</a> running a composable function if it can reuse a former result, and Compose UI doesn't re-layout or re-draw the entire tree if it doesn't have to. Compose performs only the minimum amount of work required to update the UI. This optimization is possible because Compose tracks state reads within the different phases.</p> <h3 id="understand-phases" data-text="Understand the phases" tabindex="-1">Understand the phases</h3> <p>This section describes how the three Compose phases are executed for composables in greater detail.</p> <h4 id="composition" data-text="Composition" tabindex="-1">Composition</h4> <p>In the composition phase, the Compose runtime executes composable functions and outputs a tree structure that represents your UI. This UI tree consists of layout nodes that contain all the information needed for the next phases, as shown in the following video:</p> <p><video src="/static/develop/ui/compose/images/composition.mp4" width="650px" poster="/develop/ui/compose/images/composition-screenshot.png" controls loop muted playsinline /></p> <p><strong>Figure 2.</strong> The tree representing your UI that is created in the composition phase.</p> <p>A subsection of the code and UI tree looks like the following:</p> <figure id = "image-3"> <img src="/static/develop/ui/compose/images/code-subsection.png" width = "60%" alt = "A code snippet with five composables and the resulting UI tree, with child nodes branching from their parent nodes."> <figcaption><b>Figure 3.</b> A subsection of a UI tree with the corresponding code.</figcaption> </figure> <p>In these examples, each composable function in the code maps to a single layout node in the UI tree. In more complex examples, composables can contain logic and control flow, and produce a different tree given different states.</p> <h4 id="layout" data-text="Layout" tabindex="-1">Layout</h4> <p>In the layout phase, Compose uses the UI tree produced in the composition phase as input. The collection of layout nodes contain all the information needed to decide on each node's size and location in 2D space.</p> <p><video src="/static/develop/ui/compose/images/layout.mp4" width="650px" poster="/develop/ui/compose/images/layout-screenshot.png" controls loop muted playsinline /></p> <p><strong>Figure 4.</strong> The measurement and placement of each layout node in the UI tree during the layout phase.</p> <p>During the layout phase, the tree is traversed using the following three step algorithm:</p> <ol> <li><strong>Measure children</strong>: A node measures its children if any exist.</li> <li><strong>Decide own size</strong>: Based on these measurements, a node decides on its own size.</li> <li><strong>Place children</strong>: Each child node is placed relative to a node's own position.</li> </ol> <p>At the end of this phase, each layout node has:</p> <ul> <li>An assigned <strong>width</strong> and <strong>height</strong></li> <li>An <strong>x, y coordinate</strong> where it should be drawn</li> </ul> <p>Recall the UI tree from the previous section:</p> <p><img src="/static/develop/ui/compose/images/code-subsection.png" alt="A code snippet with five composables and the resulting UI tree, with child nodes branching from their parent nodes" width="60%" class="screenshot"> </p> <p>For this tree, the algorithm works as follows:</p> <ol> <li>The <code translate="no" dir="ltr">Row</code> measures its children, <code translate="no" dir="ltr">Image</code> and <code translate="no" dir="ltr">Column</code>.</li> <li>The <code translate="no" dir="ltr">Image</code> is measured. It doesn't have any children, so it decides its own size and reports the size back to the <code translate="no" dir="ltr">Row</code>.</li> <li>The <code translate="no" dir="ltr">Column</code> is measured next. It measures its own children (two <code translate="no" dir="ltr">Text</code> composables) first.</li> <li>The first <code translate="no" dir="ltr">Text</code> is measured. It doesn't have any children so it decides its own size and reports its size back to the <code translate="no" dir="ltr">Column</code>. <ol> <li>The second <code translate="no" dir="ltr">Text</code> is measured. It doesn't have any children so it decides its own size and reports it back to the <code translate="no" dir="ltr">Column</code>.</li> </ol></li> <li>The <code translate="no" dir="ltr">Column</code> uses the child measurements to decide its own size. It uses the maximum child width and the sum of the height of its children.</li> <li>The <code translate="no" dir="ltr">Column</code> places its children relative to itself, putting them beneath each other vertically.</li> <li>The <code translate="no" dir="ltr">Row</code> uses the child measurements to decide its own size. It uses the maximum child height and the sum of the widths of its children. It then places its children.</li> </ol> <p>Note that each node was visited only once. The Compose runtime requires only one pass through the UI tree to measure and place all the nodes, which improves performance. When the number of nodes in the tree increases, the time spent traversing it increases in a linear fashion. In contrast, if each node was visited multiple times, the traversal time increases exponentially.</p> <h4 id="drawing" data-text="Drawing" tabindex="-1">Drawing</h4> <p>In the drawing phase, the tree is traversed again from top to bottom, and each node draws itself on the screen in turn.</p> <p><video src="/static/develop/ui/compose/images/drawing.mp4" width="650px" poster="/develop/ui/compose/images/drawing-screenshot.png" controls loop muted playsinline /></p> <p><strong>Figure 5.</strong> The drawing phase draws the pixels on the screen.</p> <p>Using the previous example, the tree content is drawn in the following way:</p> <ol> <li>The <code translate="no" dir="ltr">Row</code> draws any content it might have, such as a background color.</li> <li>The <code translate="no" dir="ltr">Image</code> draws itself.</li> <li>The <code translate="no" dir="ltr">Column</code> draws itself.</li> <li>The first and second <code translate="no" dir="ltr">Text</code> draw themselves, respectively.</li> </ol> <p><video src="/static/develop/ui/compose/images/drawing-ui-tree.mp4" width="650px" poster="/develop/ui/compose/images/drawing-ui-screenshot.png" controls loop muted playsinline /></p> <p><strong>Figure 6.</strong> A UI tree and its drawn representation.</p> <h2 id="state-reads" data-text="State reads" tabindex="-1">State reads</h2> <p>When you read the value of a <a href="/develop/ui/compose/state">snapshot state</a> during one of the phases listed above, Compose automatically tracks what it was doing when the value was read. This tracking allows Compose to re-execute the reader when the state value changes, and is the basis of state observability in Compose.</p> <p>State is commonly created using <code translate="no" dir="ltr">mutableStateOf()</code> and then accessed through one of two ways: by directly accessing the <code translate="no" dir="ltr">value</code> property, or alternatively by using a Kotlin property delegate. You can read more about them in <a href="/develop/ui/compose/state#state-in-composables">State in composables</a>. For the purposes of this guide, a "state read" refers to either of those equivalent access methods.</p> <p> <pre id="android_compose_phases_state_read_without_property_delegate-code-sample" data-scope="android_compose_phases_state_read_without_property_delegate" data-code-snippet="true" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_state_read_without_property_delegate" data-copy-event-label="android_compose_phases_state_read_without_property_delegate-PhasesSnippets" class="prettyprint lang-kotlin notranslate" dir="ltr">// State read without property delegate. val paddingState: MutableState<Dp> = remember { mutableStateOf(8.dp) } Text( text = "Hello", modifier = Modifier.padding(paddingState.value) )<div class="devsite-github-link nocode no-select"><a target="_top" href="https://github.com/android/snippets/blob/f4e49876ac3fad90376323fa23b6991581d547c7/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#L48-L53" class="gc-analytics-event" data-category="github_link" data-label="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#android_compose_phases_state_read_without_property_delegate" data-code-snippet="true" data-git-revision="main" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_state_read_without_property_delegate">PhasesSnippets.kt</a></div></pre></p> <p> <pre id="android_compose_phases_state_read_with_property_delegate-code-sample" data-scope="android_compose_phases_state_read_with_property_delegate" data-code-snippet="true" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_state_read_with_property_delegate" data-copy-event-label="android_compose_phases_state_read_with_property_delegate-PhasesSnippets" class="prettyprint lang-kotlin notranslate" dir="ltr">// State read with property delegate. var padding: Dp by remember { mutableStateOf(8.dp) } Text( text = "Hello", modifier = Modifier.padding(padding) )<div class="devsite-github-link nocode no-select"><a target="_top" href="https://github.com/android/snippets/blob/f4e49876ac3fad90376323fa23b6991581d547c7/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#L61-L66" class="gc-analytics-event" data-category="github_link" data-label="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#android_compose_phases_state_read_with_property_delegate" data-code-snippet="true" data-git-revision="main" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_state_read_with_property_delegate">PhasesSnippets.kt</a></div></pre></p> <p>Under the hood of the <a href="https://kotlinlang.org/docs/delegated-properties.html" class="external">property delegate</a>, "getter" and "setter" functions are used to access and update the State’s <code translate="no" dir="ltr">value</code>. These getter and setter functions are only invoked when you reference the property as a value, and not when it is created, which is why the two ways above are equivalent.</p> <p>Each block of code that can be re-executed when a read state changes is a <em>restart scope</em>. Compose keeps track of state value changes and restart scopes in different phases.</p> <h2 id="phased-state-reads" data-text="Phased state reads" tabindex="-1">Phased state reads</h2> <p>As mentioned above, there are three main phases in Compose, and Compose tracks what state is read within each of them. This allows Compose to notify only the specific phases that need to perform work for each affected element of your UI.</p> <aside class="note"><strong>Note:</strong><span> Where a state instance is created and stored has little bearing on the phases, it only matters when and where a state value is <strong>read</strong>.</span></aside> <p>Let's go through each phase and describe what happens when a state value is read within it.</p> <h3 id="phase1-comp" data-text="Phase 1: Composition" tabindex="-1">Phase 1: Composition</h3> <p>State reads within a <code translate="no" dir="ltr">@Composable</code> function or lambda block affect composition and potentially the subsequent phases. When the state value changes, the recomposer schedules reruns of all the composable functions which read that state value. Note that the runtime may decide to skip some or all of the composable functions if the inputs haven't changed. See <a href="/develop/ui/compose/lifecycle#skipping">Skipping if the inputs haven't changed</a> for more information.</p> <p>Depending on the result of composition, Compose UI runs the layout and drawing phases. It might skip these phases if the content remains the same and the size and the layout won't change.</p> <p> <pre id="android_compose_phases_composition-code-sample" data-scope="android_compose_phases_composition" data-code-snippet="true" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_composition" data-copy-event-label="android_compose_phases_composition-PhasesSnippets" class="prettyprint lang-kotlin notranslate" dir="ltr">var padding by remember { mutableStateOf(8.dp) } Text( text = "Hello", // The `padding` state is read in the composition phase // when the modifier is constructed. // Changes in `padding` will invoke recomposition. modifier = Modifier.padding(padding) )<div class="devsite-github-link nocode no-select"><a target="_top" href="https://github.com/android/snippets/blob/f4e49876ac3fad90376323fa23b6991581d547c7/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#L74-L81" class="gc-analytics-event" data-category="github_link" data-label="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#android_compose_phases_composition" data-code-snippet="true" data-git-revision="main" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_composition">PhasesSnippets.kt</a></div></pre></p> <h3 id="phase2-layout" data-text="Phase 2: Layout" tabindex="-1">Phase 2: Layout</h3> <p>The layout phase consists of two steps: <em>measurement</em> and <em>placement</em>. The measurement step runs the measure lambda passed to the <code translate="no" dir="ltr">Layout</code> composable, the <code translate="no" dir="ltr">MeasureScope.measure</code> method of the <code translate="no" dir="ltr">LayoutModifier</code> interface, and so on. The placement step runs the placement block of the <code translate="no" dir="ltr">layout</code> function, the lambda block of <code translate="no" dir="ltr">Modifier.offset { … }</code>, and so on.</p> <p>State reads during each of these steps affect the layout and potentially the drawing phase. When the state value changes, Compose UI schedules the layout phase. It also runs the drawing phase if size or position has changed.</p> <p>To be more precise, the measurement step and the placement step have separate restart scopes, meaning that state reads in the placement step don't re-invoke the measurement step before that. However, these two steps are often intertwined, so a state read in the placement step can affect other restart scopes that belong to the measurement step.</p> <p> <pre id="android_compose_phases_layout-code-sample" data-scope="android_compose_phases_layout" data-code-snippet="true" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_layout" data-copy-event-label="android_compose_phases_layout-PhasesSnippets" class="prettyprint lang-kotlin notranslate" dir="ltr">var offsetX by remember { mutableStateOf(8.dp) } Text( text = "Hello", modifier = Modifier.offset { // The `offsetX` state is read in the placement step // of the layout phase when the offset is calculated. // Changes in `offsetX` restart the layout. IntOffset(offsetX.roundToPx(), 0) } )<div class="devsite-github-link nocode no-select"><a target="_top" href="https://github.com/android/snippets/blob/f4e49876ac3fad90376323fa23b6991581d547c7/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#L89-L98" class="gc-analytics-event" data-category="github_link" data-label="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#android_compose_phases_layout" data-code-snippet="true" data-git-revision="main" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_layout">PhasesSnippets.kt</a></div></pre></p> <h3 id="phase3-drawing" data-text="Phase 3: Drawing" tabindex="-1">Phase 3: Drawing</h3> <p>State reads during drawing code affect the drawing phase. Common examples include <code translate="no" dir="ltr">Canvas()</code>, <code translate="no" dir="ltr">Modifier.drawBehind</code>, and <code translate="no" dir="ltr">Modifier.drawWithContent</code>. When the state value changes, Compose UI runs only the draw phase.</p> <p> <pre id="android_compose_phases_drawing-code-sample" data-scope="android_compose_phases_drawing" data-code-snippet="true" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_drawing" data-copy-event-label="android_compose_phases_drawing-PhasesSnippets" class="prettyprint lang-kotlin notranslate" dir="ltr">var color by remember { mutableStateOf(Color.Red) } Canvas(modifier = modifier) { // The `color` state is read in the drawing phase // when the canvas is rendered. // Changes in `color` restart the drawing. drawRect(color) }<div class="devsite-github-link nocode no-select"><a target="_top" href="https://github.com/android/snippets/blob/f4e49876ac3fad90376323fa23b6991581d547c7/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#L106-L112" class="gc-analytics-event" data-category="github_link" data-label="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#android_compose_phases_drawing" data-code-snippet="true" data-git-revision="main" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_drawing">PhasesSnippets.kt</a></div></pre></p> <p><img src="/static/develop/ui/compose/images/phases-state-read-draw.svg" alt width></p> <h2 id="optimizing-state-reads" data-text="Optimizing state reads" tabindex="-1">Optimizing state reads</h2> <p>As Compose performs localized state read tracking, we can minimize the amount of work performed by reading each state in an appropriate phase.</p> <p>Let’s take a look at an example. Here we have an <code translate="no" dir="ltr">Image()</code> which uses the offset modifier to offset its final layout position, resulting in a parallax effect as the user scrolls.</p> <p> <pre id="android_compose_phases_optimize_state_reads_before-code-sample" data-scope="android_compose_phases_optimize_state_reads_before" data-code-snippet="true" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_optimize_state_reads_before" data-copy-event-label="android_compose_phases_optimize_state_reads_before-PhasesSnippets" class="prettyprint lang-kotlin notranslate" dir="ltr">Box { val listState = rememberLazyListState() Image( // ... // Non-optimal implementation! Modifier.offset( with(LocalDensity.current) { // State read of firstVisibleItemScrollOffset in composition (listState.firstVisibleItemScrollOffset / 2).toDp() } ) ) LazyColumn(state = listState) { // ... } }<div class="devsite-github-link nocode no-select"><a target="_top" href="https://github.com/android/snippets/blob/f4e49876ac3fad90376323fa23b6991581d547c7/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#L119-L140" class="gc-analytics-event" data-category="github_link" data-label="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#android_compose_phases_optimize_state_reads_before" data-code-snippet="true" data-git-revision="main" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_optimize_state_reads_before">PhasesSnippets.kt</a></div></pre></p> <p>This code works, but results in nonoptimal performance. As written, the code reads the value of the <code translate="no" dir="ltr">firstVisibleItemScrollOffset</code> state and passes it to the <a href="/reference/kotlin/androidx/compose/foundation/layout/package-summary#(androidx.compose.ui.Modifier).offset(androidx.compose.ui.unit.Dp,androidx.compose.ui.unit.Dp)"><code translate="no" dir="ltr">Modifier.offset(offset: Dp)</code></a> function. As the user scrolls the <code translate="no" dir="ltr">firstVisibleItemScrollOffset</code> value will change. As we know, Compose tracks any state reads so that it can restart (re-invoke) the reading code, which in our example is the content of the <code translate="no" dir="ltr">Box</code>.</p> <p>This is an example of state being read within the <strong>composition</strong> phase. This is not necessarily a bad thing at all, and in fact is the basis of recomposition, allowing data changes to emit new UI.</p> <p>In this example though it is nonoptimal, because every scroll event will result in the entire composable content being reevaluated, and then also measured, laid out and finally drawn. We’re triggering the Compose phase on every scroll even though <strong>what</strong> we are showing hasn’t changed, only <strong>where</strong> it is shown. We can optimize our state read to only re-trigger the layout phase.</p> <p>There is another version of the offset modifier available: <a href="/reference/kotlin/androidx/compose/foundation/layout/package-summary#(androidx.compose.ui.Modifier).offset(kotlin.Function1)"><code translate="no" dir="ltr">Modifier.offset(offset: Density.() -> IntOffset)</code></a>.</p> <p>This version takes a lambda parameter, where the resulting offset is returned by the lambda block. Let’s update our code to use it:</p> <p> <pre id="android_compose_phases_optimize_state_reads_after-code-sample" data-scope="android_compose_phases_optimize_state_reads_after" data-code-snippet="true" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_optimize_state_reads_after" data-copy-event-label="android_compose_phases_optimize_state_reads_after-PhasesSnippets" class="prettyprint lang-kotlin notranslate" dir="ltr">Box { val listState = rememberLazyListState() Image( // ... Modifier.offset { // State read of firstVisibleItemScrollOffset in Layout IntOffset(x = 0, y = listState.firstVisibleItemScrollOffset / 2) } ) LazyColumn(state = listState) { // ... } }<div class="devsite-github-link nocode no-select"><a target="_top" href="https://github.com/android/snippets/blob/f4e49876ac3fad90376323fa23b6991581d547c7/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#L147-L165" class="gc-analytics-event" data-category="github_link" data-label="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#android_compose_phases_optimize_state_reads_after" data-code-snippet="true" data-git-revision="main" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_optimize_state_reads_after">PhasesSnippets.kt</a></div></pre></p> <p>So why is this more performant? The lambda block we provide to the modifier is invoked during the <strong>layout</strong> phase (specifically, during the layout phase's placement step), meaning that our <code translate="no" dir="ltr">firstVisibleItemScrollOffset</code> state is no longer read during composition. Because Compose tracks when state is read, this change means that if the <code translate="no" dir="ltr">firstVisibleItemScrollOffset</code> value changes, Compose only has to restart the layout and drawing phases.</p> <aside class="note"><strong>Note:</strong><span> You might wonder if taking a lambda parameter might add extra cost compared to taking a simple value. It does. However, the benefit of limiting the state read to the layout phase overweighs the cost in this case. The value of <code translate="no" dir="ltr">firstVisibleItemScrollOffset</code> changes every frame during scroll, and by deferring the state read to the layout phase, we can avoid recompositions all along.</span></aside> <p>This example relies on the different offset modifiers to be able to optimize the resulting code, but the general idea is true: try to localize state reads to the lowest possible phase, enabling Compose to perform the minimum amount of work.</p> <p>Of course, it is often absolutely necessary to read states in the composition phase. Even so, there are cases where we can minimize the number of recompositions by filtering state changes. For more information about this, see <a href="/develop/ui/compose/side-effects#derivedstateof">derivedStateOf: convert one or multiple state objects into another state</a>.</p> <h2 id="recomp-loop" data-text="Recomposition loop (cyclic phase dependency)" tabindex="-1">Recomposition loop (cyclic phase dependency)</h2> <p>Earlier we mentioned that the phases of Compose are always invoked in the same order, and that there is no way to go backwards while in the same frame. However, that doesn’t prohibit apps getting into composition loops across <em>different</em> frames. Consider this example:</p> <p> <pre id="android_compose_phases_loop-code-sample" data-scope="android_compose_phases_loop" data-code-snippet="true" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_loop" data-copy-event-label="android_compose_phases_loop-PhasesSnippets" class="prettyprint lang-kotlin notranslate" dir="ltr">Box { var imageHeightPx by remember { mutableStateOf(0) } Image( painter = painterResource(R.drawable.rectangle), contentDescription = "I'm above the text", modifier = Modifier .fillMaxWidth() .onSizeChanged { size -> // Don't do this imageHeightPx = size.height } ) Text( text = "I'm below the image", modifier = Modifier.padding( top = with(LocalDensity.current) { imageHeightPx.toDp() } ) ) }<div class="devsite-github-link nocode no-select"><a target="_top" href="https://github.com/android/snippets/blob/f4e49876ac3fad90376323fa23b6991581d547c7/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#L180-L200" class="gc-analytics-event" data-category="github_link" data-label="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt#android_compose_phases_loop" data-code-snippet="true" data-git-revision="main" data-github-path="android/snippets/compose/snippets/src/main/java/com/example/compose/snippets/phases/PhasesSnippets.kt" data-region-tag="android_compose_phases_loop">PhasesSnippets.kt</a></div></pre></p> <p>Here we have (badly) implemented a vertical column, with the image at the top, and then the text below it. We’re using <code translate="no" dir="ltr">Modifier.onSizeChanged()</code> to know the resolved size of the image, and then using <code translate="no" dir="ltr">Modifier.padding()</code> on the text to shift it down. The unnatural conversion from <code translate="no" dir="ltr">Px</code> back to <code translate="no" dir="ltr">Dp</code> already indicates that the code has some issue.</p> <p>The issue with this example is that we don’t arrive at the "final" layout within a single frame. The code relies on multiple frames happening, which performs unnecessary work, and results in UI jumping around on screen for the user.</p> <p>Let’s step through each frame to see what is happening:</p> <p>At the composition phase of the first frame, <code translate="no" dir="ltr">imageHeightPx</code> has a value of 0, and the text is provided with <code translate="no" dir="ltr">Modifier.padding(top = 0)</code>. Then, the layout phase follows, and the callback for the <code translate="no" dir="ltr">onSizeChanged</code> modifier is called. This is when the <code translate="no" dir="ltr">imageHeightPx</code> is updated to the actual height of the image. Compose schedules recomposition for the next frame. At the drawing phase, the text is rendered with the padding of 0 since the value change is not reflected yet.</p> <p>Compose then starts the second frame scheduled by the value change of <code translate="no" dir="ltr">imageHeightPx</code>. The state is read in the Box content block, and it is invoked in the composition phase. This time, the text is provided with a padding matching the image height. At the layout phase, the code does set the value of <code translate="no" dir="ltr">imageHeightPx</code> again, but no recomposition is scheduled since the value remains the same.</p> <p>In the end, we get the desired padding on the text, but it is nonoptimal to spend an extra frame to pass the padding value back to a different phase and will result in producing a frame with overlapping content.</p> <p><img src="/static/develop/ui/compose/images/phases-recomp-loop.svg" alt width></p> <p>This example may seem contrived, but be careful of this general pattern:</p> <ul> <li><code translate="no" dir="ltr">Modifier.onSizeChanged()</code>, <code translate="no" dir="ltr">onGloballyPositioned()</code>, or some other layout operations</li> <li>Update some state</li> <li>Use that state as input to a layout modifier (<code translate="no" dir="ltr">padding()</code>,<code translate="no" dir="ltr">height()</code>, or similar)</li> <li>Potentially repeat</li> </ul> <p>The fix for the sample above is to use the proper layout primitives. The example above can be implemented with a simple <code translate="no" dir="ltr">Column()</code>, but you may have a more complex example which requires something custom, which will require writing a custom layout. See the <a href="/develop/ui/compose/layouts/custom">Custom layouts</a> guide for more information.</p> <p>The general principle here is to have a single source of truth for multiple UI elements that should be measured and placed with regards to one another. Using a proper layout primitive or creating a custom layout means that the minimal shared parent serves as the source of truth that can coordinate the relation between multiple elements. 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