AppSearch | Jetpack | Android Developers

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<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> <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 devsite-no-page-title"> <p></p> <h1 class="devsite-page-title" style="width:50%" id="appsearch" data-text="AppSearch">AppSearch</h1> <div style="align:right; text-align:right; padding-bottom:21px; margin-top:-45px; border-bottom:1px solid black;"> <a href="/web/20230326211809/https://developer.android.com/guide/topics/search/appsearch">User Guide</a>  <a href="https://web.archive.org/web/20230326211809/https://github.com/android/search-samples/tree/main/AppSearchSample">Code Sample</a> </div> <div style="float:left; font-size:medium; margin-bottom:5px; margin-top:10px" class="nocontent"> <div style="text-align:left; font-size:90%; padding-right:30px; margin-right:10px; margin-bottom:10px;"> API Reference<br> <a href="/web/20230326211809/https://developer.android.com/reference/androidx/appsearch/annotation/package-summary">androidx.appsearch.annotation</a><br> <a href="/web/20230326211809/https://developer.android.com/reference/androidx/appsearch/app/package-summary">androidx.appsearch.app</a><br> <a href="/web/20230326211809/https://developer.android.com/reference/androidx/appsearch/exceptions/package-summary">androidx.appsearch.exceptions</a><br> <a href="/web/20230326211809/https://developer.android.com/reference/androidx/appsearch/localstorage/package-summary">androidx.appsearch.localstorage</a><br> <a href="/web/20230326211809/https://developer.android.com/reference/androidx/appsearch/platformstorage/package-summary">androidx.appsearch.platformstorage</a><br> </div> </div> <div style="text-align:left; padding-left:10px; margin-left:10px; margin-top:15px; margin-bottom:10px;"> AppSearch is an on-device search library for managing locally stored structured data, with APIs for indexing data and retrieving data using full-text search. Use it to build custom in-app search capabilities for your users. </div> <div style="clear:both"></div> <table style="width:100%"> <tr> <th style="width:15%">Latest Update</th> <th style="width:15%">Stable Release</th> <th style="width:15%">Release Candidate</th> <th style="width:15%">Beta Release</th> <th style="width:15%">Alpha Release</th></tr> <tr> <td>August 24, 2022</td> <td>-</td> <td>-</td> <td>-</td> <td><a href="/web/20230326211809/https://developer.android.com/jetpack/androidx/releases/appsearch#1.1.0-alpha02">1.1.0-alpha02</a></td> </tr> </table> <h2 id="declaring_dependencies" data-text="Declaring dependencies">Declaring dependencies</h2> <p>To add a dependency on AppSearch, you must add the Google Maven repository to your project. Read <a href="/web/20230326211809/https://developer.android.com/studio/build/dependencies#google-maven">Google's Maven repository</a> for more information.</p> <p>Add the dependencies for the artifacts you need in the <code translate="no" dir="ltr">build.gradle</code> file for your app or module:</p> <div> <div class="ds-selector-tabs"><section><h3 id="groovy" data-text="Groovy">Groovy</h3> <pre class="prettyprint lang-groovy" translate="no" dir="ltr"> dependencies { def appsearch_version = "1.1.0-alpha02" implementation "androidx.appsearch:appsearch:$appsearch_version" // Use kapt instead of annotationProcessor if writing Kotlin classes annotationProcessor "androidx.appsearch:appsearch-compiler:$appsearch_version" implementation "androidx.appsearch:appsearch-local-storage:$appsearch_version" // PlatformStorage is compatible with Android 12+ devices, and offers additional features // to LocalStorage. implementation "androidx.appsearch:appsearch-platform-storage:$appsearch_version" } </pre> </section><section><h3 id="kts" data-text="Kotlin">Kotlin</h3> <pre class="prettyprint lang-kotlin" translate="no" dir="ltr"> dependencies { val appsearch_version = "1.1.0-alpha02" implementation("androidx.appsearch:appsearch:$appsearch_version") // Use annotationProcessor instead of kapt if writing Java classes kapt("androidx.appsearch:appsearch-compiler:$appsearch_version") implementation("androidx.appsearch:appsearch-local-storage:$appsearch_version") // PlatformStorage is compatible with Android 12+ devices, and offers additional features // to LocalStorage. implementation("androidx.appsearch:appsearch-platform-storage:$appsearch_version") } </pre> </section></div> </div> <p>For more information about dependencies, see <a href="/web/20230326211809/https://developer.android.com/studio/build/dependencies">Add Build Dependencies</a>.</p> <h2 id="feedback" data-text="Feedback">Feedback</h2> <p>Your feedback helps make Jetpack better. Let us know if you discover new issues or have ideas for improving this library. Please take a look at the <a href="https://web.archive.org/web/20230326211809/https://issuetracker.google.com/issues?q=componentid:1012737%20status:open">existing issues</a> in this library before you create a new one. You can add your vote to an existing issue by clicking the star button.</p> <p><a href="https://web.archive.org/web/20230326211809/https://issuetracker.google.com/issues/new?component=1012737&template=1551039" class="button dac-button dac-outline-button">Create a new issue</a></p> <p>See the <a href="https://web.archive.org/web/20230326211809/https://developers.google.com/issue-tracker">Issue Tracker documentation</a> for more information.</p> <p></p> <h2 id="version_11_2" data-text="Version 1.1">Version 1.1</h2> <h3 id="1.1.0-alpha02" data-text="Version 1.1.0-alpha02">Version 1.1.0-alpha02</h3> <p>August 24, 2022</p> <p><code translate="no" dir="ltr">androidx.appsearch:appsearch-*:1.1.0-alpha02</code> is released. <a href="https://web.archive.org/web/20230326211809/https://android.googlesource.com/platform/frameworks/support/+log/c24e9aa02c6f6b97ada475f6d66eab39d72d29ba..dd1e45e8550560087f6447a34a9145048b5766f4/appsearch">Version 1.1.0-alpha02 contains these commits.</a></p> <p><strong>New Features</strong></p> <ul> <li>Sped up Optimize process using index compaction rather than rebuilding index from scratch</li> <li>Changed native logging tag from "icing" to "AppSearchIcing", log INFO messages by default</li> </ul> <p><strong>API Changes</strong></p> <ul> <li>Adds new <code translate="no" dir="ltr">PropertyPath</code> object for working with paths, and new <code translate="no" dir="ltr">addProjection</code> methods to accept <code translate="no" dir="ltr">PropertyPath</code>. (<a href="https://web.archive.org/web/20230326211809/https://android-review.googlesource.com/#/q/I45588aad8525a9150768089d78541a0f5e4dc767">I45588</a>)</li> <li>Added <code translate="no" dir="ltr">builtin:Thing</code> to <code translate="no" dir="ltr">AppSearch</code> builtin types (<a href="https://web.archive.org/web/20230326211809/https://android-review.googlesource.com/#/q/I55427fc371d3a22da578522114766bb9e529286b">I55427</a>)</li> <li>Prevent empty property names in <code translate="no" dir="ltr">GenericDocument</code> sooner – previously they were prevented at indexing time, now they are prevented at <code translate="no" dir="ltr">GenericDocument.Builder.build()</code> time (<a href="https://web.archive.org/web/20230326211809/https://android-review.googlesource.com/#/q/I9e780218dd4fc8a65092ec76bcac8c0ba0cd4636">I9e780</a>)</li> </ul> <p><strong>Bug Fixes</strong></p> <ul> <li>Removed unnecessary string formatting to improve RELEVANCE scoring performance</li> <li>More efficient pagination when encountering unreadable or deleted documents</li> <li>Implemented garbage collection for abandoned queries</li> <li>Fix nested indexing support for Documents. Previously indexNestedProperties was ignored. (<a href="https://web.archive.org/web/20230326211809/https://android-review.googlesource.com/#/q/Iae9a67a03e8f2d6447578c0c26a53d03290b493f">Iae9a6</a>)</li> </ul> <p><strong>External Contribution</strong></p> <ul> <li>Shea Smith: Fix nested indexing support for Documents. (<a href="https://web.archive.org/web/20230326211809/https://android-review.googlesource.com/#/q/Iae9a67a03e8f2d6447578c0c26a53d03290b493f">Iae9a6</a>)</li> </ul> <h3 id="1.1.0-alpha01" data-text="Version 1.1.0-alpha01">Version 1.1.0-alpha01</h3> <p>June 15, 2022</p> <p><code translate="no" dir="ltr">androidx.appsearch:appsearch-*:1.1.0-alpha01</code> is released. Version 1.1.0-alpha01 was developed in a private pre-release branch and has no public commits.</p> <p><strong>API Changes</strong></p> <ul> <li>All methods returning <code translate="no" dir="ltr">ListenableFuture</code> have been renamed to have the Async suffix. For example, <code translate="no" dir="ltr">getSchema</code> has been renamed to <code translate="no" dir="ltr">getSchemaAsync</code>. The previous versions have been deprecated and will be removed in a future release.</li> </ul> <p><strong>New Features</strong></p> <ul> <li>First release of appsearch-builtin-types. This project contains some builtin types based on schema.org which clients may find convenient to use instead of defining their own types for common objects. More types will be added in future releases.</li> <li>Ability to use <code translate="no" dir="ltr">ShortcutAdapter</code> to convert an <code translate="no" dir="ltr">AppSearch</code> Document into a <code translate="no" dir="ltr">ShortcutInfoCompat</code>. This gives clients a way to share <code translate="no" dir="ltr">AppSearch</code> documents to Google using the core-google-shortcuts library</li> <li>Ability to use inheritance with <code translate="no" dir="ltr">@Document</code> classes. Fields cannot be replaced or modified, but new fields can be added by extending a class annotated with <code translate="no" dir="ltr">@Document</code>.</li> <li>New Observer API which allows clients to register for notifications when types they have access to have changed or when documents of those types are added, modified or removed. IMPORTANT: The current implementation delivers notifications only when your app is running. There is currently no way to inspect changes that have occurred while your app was stopped. Accordingly you should not rely on this API for completeness.</li> <li>Property parser API which allows you to fully handle and inspect property paths returned by <code translate="no" dir="ltr">MatchInfo#getPropertyPath</code>.</li> <li>Global <code translate="no" dir="ltr">getById</code> and global <code translate="no" dir="ltr">getSchema</code> API for retrieving documents and schemas from other apps which have granted you visibility.</li> <li>Ability to retrieve visibility information in <code translate="no" dir="ltr">getSchema</code> for data you have access to</li> <li>Ability to grant visibility to apps holding a certain Android permission (restricted to a narrow set of allowlisted permissions)</li> <li>Support <code translate="no" dir="ltr">isFoo()</code>-style getters for boolean fields in the annotation processor, in addition to the previous supported style <code translate="no" dir="ltr">hasFoo()</code></li> <li>Support for new features guarded behind <code translate="no" dir="ltr">@RequiresFeature</code>. Use <code translate="no" dir="ltr">AppSearchSession#getFeatures</code> to determine what the current backend supports.</li> <li>Remove the ~13k token limit on individual documents</li> <li>Allow matching on non-ascii+non-alphanumeric characters, such as emojis</li> </ul> <p><strong>Bug Fixes</strong></p> <ul> <li>Fix bug that would fail <code translate="no" dir="ltr">SetSchema</code> when overriding a nested incompatible type.</li> <li>Fixes to fully support <code translate="no" dir="ltr">@AutoValue</code>-annotated classes being used as AppSearch <code translate="no" dir="ltr">@Document</code> classes</li> <li>Fixes for some crashes related to repeated lists of Document classes and other issues</li> <li>Fix for bug that would crash prefix search under certain circumstances</li> <li>Fix minor bug in <code translate="no" dir="ltr">GetStorageInfo</code> that would return incorrect values when encountering IO failures</li> <li>Fix <code translate="no" dir="ltr">BUSADDERR</code> issues when reading a document</li> <li>Fix logcat corruption caused by printing unformatted fingerprint</li> <li>Fix NPE caused by IO failures</li> <li>Fix memory leak in <code translate="no" dir="ltr">GetSchemaType</code>, <code translate="no" dir="ltr">Get</code>, <code translate="no" dir="ltr">Delete</code>, <code translate="no" dir="ltr">DeleteByNamespace</code> and <code translate="no" dir="ltr">DeleteBySchemaType</code></li> </ul> <h2 id="version_100_2" data-text="Version 1.0.0">Version 1.0.0</h2> <h3 id="1.0.0-alpha04" data-text="Version 1.0.0-alpha04">Version 1.0.0-alpha04</h3> <p>November 3, 2021</p> <p><code translate="no" dir="ltr">androidx.appsearch:appsearch-*:1.0.0-alpha04</code> is released. <a href="https://web.archive.org/web/20230326211809/https://android.googlesource.com/platform/frameworks/support/+log/85f7b1566fa43b10b48aa6c8fbb3855f6cd02adb..f07d12061370a603549747200c79b60239706330/appsearch">Version 1.0.0-alpha04 contains these commits.</a></p> <p><strong>New Features</strong></p> <ul> <li>Guava ListenableFuture dependency automatically brought in as an API dependency</li> </ul> <p><strong>API Changes</strong></p> <ul> <li>Add SearchResult#getSubmatchRange() and SearchResult#getSubmatch() to provide more information about each match. (<a href="https://web.archive.org/web/20230326211809/https://android-review.googlesource.com/#/q/I2fef6746cada48fc7d0e51cf55378c71a6cb3ba8">I2fef6</a>)</li> <li>Clarify documentation around how to generate PackageIdentifier fingerprints for sharing data by packagename+certificate</li> </ul> <p><strong>Bug Fixes</strong></p> <ul> <li>Fix crash if user tries to fetch result pages after the end of the result set</li> <li>Fix issue with all namespaces being queried if only invalid namespaces were supplied as query filters</li> <li>Fix issue with all namespaces being removed if only invalid namespaces were supplied as remove-by-query filtersLo</li> <li>Fix issue where document data stopped being indexed after a certain point for very large documents</li> <li>Fix issue where tokenization would drop segments with non-Ascii numeric characters</li> <li>Add check for consecutive failed initialization attempts to help break out of potential bad state that prevents successful initialization.</li> </ul> <h3 id="1.0.0-alpha03" data-text="Version 1.0.0-alpha03">Version 1.0.0-alpha03</h3> <p>July 21, 2021</p> <p><code translate="no" dir="ltr">androidx.appsearch:appsearch-*:1.0.0-alpha03</code> is released. <a href="https://web.archive.org/web/20230326211809/https://android.googlesource.com/platform/frameworks/support/+log/85f7b1566fa43b10b48aa6c8fbb3855f6cd02adb/appsearch">Version 1.0.0-alpha03 contains these commits.</a></p> <p><strong>New Features</strong></p> <ul> <li>Release of the Platform Storage Backend to allow clients to use the AppSearch API with the new <a href="/web/20230326211809/https://developer.android.com/reference/android/app/appsearch/AppSearchManager"><code translate="no" dir="ltr">android.app.appsearch.AppSearchManager</code></a> service launching in Android S. For more details, please visit AppSearch Developer Guide.</li> <li>Annotation processor support for AutoValue</li> <li>Removal of maximum size limit of single string property</li> <li>New storage format to reduce initialization latency</li> <li>A one-time, internal data migration from old storage format to new storage format</li> </ul> <p><strong>Bug Fixes</strong></p> <ul> <li>Correctly enforces maximum document limit when inserting new documents</li> <li>Fixed crash during AppSearchSession creation</li> <li>Fixed bugs in SetSchema that were not detecting some cases of backwards incompatibility and index incompatibility</li> </ul> <h3 id="1.0.0-alpha02" data-text="Version 1.0.0-alpha02">Version 1.0.0-alpha02</h3> <p>June 30, 2021</p> <p><code translate="no" dir="ltr">androidx.appsearch:appsearch:1.0.0-alpha02</code>, <code translate="no" dir="ltr">androidx.appsearch:appsearch-compiler:1.0.0-alpha02</code>, and <code translate="no" dir="ltr">androidx.appsearch:appsearch-local-storage:1.0.0-alpha02</code> are released. <a href="https://web.archive.org/web/20230326211809/https://android.googlesource.com/platform/frameworks/support/+log/43efd2a468468f712e4555faaea12019fdfb06e9..8276b615cf32743aaecf8bca0e294eb2e8eb236b/appsearch">Version 1.0.0-alpha02 contains these commits.</a></p> <p><strong>New Features</strong></p> <ul> <li>Full support of Chinese/Japanese/Korean/Thai languages</li> <li>Reduced size of <code translate="no" dir="ltr">androidx.appsearch:appsearch-local-storage</code></li> <li>Removal of maximum size limit of repeated properties</li> <li>Allow reuse of builder classes</li> <li>Improvements in <code translate="no" dir="ltr">toString()</code> of certain objects for easier debugging</li> <li>Javadoc documentation improvements</li> </ul> <p><strong>API Changes</strong></p> <ul> <li><code translate="no" dir="ltr">SearchResult#getMatches</code> renamed to <code translate="no" dir="ltr">SearchResult#getMatchInfos</code></li> <li><code translate="no" dir="ltr">@Document.Int64Property</code> renamed to <code translate="no" dir="ltr">@Document.LongProperty</code></li> </ul> <p><strong>Bug Fixes</strong></p> <ul> <li>Improvements and fixes to computation of result snippets</li> <li>Fixes to bugs in AppSearchSession initialization</li> </ul> <h3 id="1.0.0-alpha01" data-text="Version 1.0.0-alpha01">Version 1.0.0-alpha01</h3> <p>May 5, 2021</p> <p><code translate="no" dir="ltr">androidx.appsearch:appsearch:1.0.0-alpha01</code>, <code translate="no" dir="ltr">androidx.appsearch:appsearch-compiler:1.0.0-alpha01</code>, and <code translate="no" dir="ltr">androidx.appsearch:appsearch-local-storage:1.0.0-alpha01</code> are released. <a href="https://web.archive.org/web/20230326211809/https://googleplex-android.googlesource.com/platform/frameworks/support/+log/43efd2a468468f712e4555faaea12019fdfb06e9/appsearch">Version 1.0.0-alpha01 contains these commits.</a></p> <p><strong>New Features</strong></p> <p>AppSearch is a search library for managing locally stored structured data, with APIs for indexing data and retrieving data via full-text search. Use it to build custom in-app search capabilities for your users. This initial release is <code translate="no" dir="ltr">1.0.0-alpha01</code>.</p> <devsite-hats-survey class="nocontent" hats-id="onAFgYxTD0kxBYCLVTd0Z41p75CM" listnr-id="5207477"></devsite-hats-survey> </div> <devsite-recommendations display="in-page" hidden yield> </devsite-recommendations> <devsite-thumb-rating position="footer"> </devsite-thumb-rating> <devsite-recommendations id="recommendations-link" yield></devsite-recommendations> </article> <devsite-content-footer class="nocontent"> <p>Content and code samples on this page are subject to the licenses described in the <a href="/web/20230326211809/https://developer.android.com/license">Content License</a>. 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