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Android Cloud to Device Messaging - Wikipedia

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id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Defunct mobile notification service</div> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox vevent"><caption class="infobox-title summary">Android Cloud to Device Messaging</caption><tbody><tr><td colspan="2" class="infobox-image"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:C2DM_Service_Architecture.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/C2DM_Service_Architecture.svg/220px-C2DM_Service_Architecture.svg.png" decoding="async" width="220" height="147" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/C2DM_Service_Architecture.svg/330px-C2DM_Service_Architecture.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/83/C2DM_Service_Architecture.svg/440px-C2DM_Service_Architecture.svg.png 2x" data-file-width="1013" data-file-height="675" /></a></span><div class="infobox-caption">Overview of the C2DM Service architecture.</div></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Software_developer" class="mw-redirect" title="Software developer">Developer(s)</a></th><td class="infobox-data"><a href="/wiki/Google" title="Google">Google</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Operating_system" title="Operating system">Target platform(s)</a></th><td class="infobox-data"><a href="/wiki/Android_(operating_system)" title="Android (operating system)">Android</a>, <a href="/wiki/Chrome_(browser)" class="mw-redirect" title="Chrome (browser)">Chrome</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Programming_language" title="Programming language">Programming language(s)</a></th><td class="infobox-data"><a href="/wiki/Java_(programming_language)" title="Java (programming language)">Java</a></td></tr><tr><th scope="row" class="infobox-label">Status</th><td class="infobox-data">Discontinued</td></tr><tr><th scope="row" class="infobox-label">License</th><td class="infobox-data">Open-source</td></tr><tr><th scope="row" class="infobox-label">Website</th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="https://developers.google.com/android/c2dm/">developers<wbr />.google<wbr />.com<wbr />/android<wbr />/c2dm<wbr />/</a></span>&#160;<span class="penicon autoconfirmed-show"><span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q21462866?uselang=en#P856" title="Edit this on Wikidata"><img alt="Edit this on Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span></td></tr></tbody></table> <p><b>Android Cloud to Device Messaging</b> (commonly referred to as <b>Cloud to Device Messaging</b>), or <b>C2DM</b>, is a defunct mobile <a href="/wiki/Notification_service" title="Notification service">notification service</a> that was developed by <a href="/wiki/Google" title="Google">Google</a> and replaced by the <a href="/wiki/Google_Cloud_Messaging" title="Google Cloud Messaging">Google Cloud Messaging</a> service. It enabled developers to send data from servers to <a href="/wiki/Android_(operating_system)" title="Android (operating system)">Android</a> applications and <a href="/wiki/Chrome_(browser)" class="mw-redirect" title="Chrome (browser)">Chrome</a> extensions. C2DM originally launched in 2010 and was available beginning with version 2.2 of <a href="/wiki/Android_(operating_system)" title="Android (operating system)">Android</a>.<sup id="cite_ref-Vogella_1-0" class="reference"><a href="#cite_note-Vogella-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup> On June 27, 2012, Google unveiled the Google Cloud Messaging service aimed at replacing C2DM, citing improvements to authentication and delivery, new API endpoints and messaging parameters, and the removal of API rate limits and maximum message sizes.<sup id="cite_ref-InfoQ_2-0" class="reference"><a href="#cite_note-InfoQ-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup> Google announced official deprecation of the C2DM service in August 2012, and released documentation to assist developers with migrating to the new service. The C2DM service was discontinued for existing applications and completely shut down on October 20, 2015.<sup id="cite_ref-GoogleDeprecated_3-0" class="reference"><a href="#cite_note-GoogleDeprecated-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Technical_details">Technical details</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Android_Cloud_to_Device_Messaging&amp;action=edit&amp;section=1" title="Edit section: Technical details"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The C2DM service consisted of sub-services and interfaces necessary with maintaining security and reliability. When an application registered for C2DM messages and data, it received a <i>C2DM Registration ID</i> from the service. This identifier was unique to the application on the device, and was used to identify the device that the data or message request was intended for. This identifier was typically sent by the client application to a server owned by the developer or creator for tracking and statistical purposes. Upon sending a data or push request, the server sent an authentication request and the <i>C2DM Registration ID</i> of the device to the C2DM authentication service, which responded with an <i>authentication token</i> upon success. The third party server then submitted both identifiers within the final data request to be enqueued and sent to the device. When the device received the information from the C2DM, the request was removed from the C2DM queue.<sup id="cite_ref-ProfessionalDevBook_4-0" class="reference"><a href="#cite_note-ProfessionalDevBook-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Migration_to_the_Google_Cloud_Messaging_service">Migration to the Google Cloud Messaging service</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Android_Cloud_to_Device_Messaging&amp;action=edit&amp;section=2" title="Edit section: Migration to the Google Cloud Messaging service"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Shortly after announcing the <a href="/wiki/Google_Cloud_Messaging" title="Google Cloud Messaging">Google Cloud Messaging</a> service, Google published documentation to guide application developers with migrating from the C2DM and onto the new service.<sup id="cite_ref-GoogleMigration_5-0" class="reference"><a href="#cite_note-GoogleMigration-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup> Migrating to the service required SDK and code changes, as well as a release of an application update to the publishing repository (such as <a href="/wiki/Google_Play" title="Google Play">Google Play</a>) for downloading and updating. The C2DM and the Google Cloud Messaging service were not interoperable between each other; you could not send data requests using one service to be received and processed on the client app using the other. The migration also required changes to be made on the third party server operated by the developer (depending on the complexity and use case regarding the data sent).<sup id="cite_ref-GoogleMigration_5-1" class="reference"><a href="#cite_note-GoogleMigration-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Android_Cloud_to_Device_Messaging&amp;action=edit&amp;section=3" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-Vogella-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-Vogella_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFVogel2011" class="citation web cs1">Vogel, Lars (September 12, 2011). <a rel="nofollow" class="external text" href="http://www.vogella.com/tutorials/GoogleCloudMessaging/article.html">"Android Cloud to Device Messaging (C2DM) - Tutorial"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">September 4,</span> 2016</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=Android+Cloud+to+Device+Messaging+%28C2DM%29+-+Tutorial&amp;rft.date=2011-09-12&amp;rft.aulast=Vogel&amp;rft.aufirst=Lars&amp;rft_id=http%3A%2F%2Fwww.vogella.com%2Ftutorials%2FGoogleCloudMessaging%2Farticle.html&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AAndroid+Cloud+to+Device+Messaging" class="Z3988"></span></span> </li> <li id="cite_note-InfoQ-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-InfoQ_2-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFRubio2012" class="citation web cs1">Rubio, Daniel (August 12, 2012). <a rel="nofollow" class="external text" href="http://www.infoq.com/news/2012/08/GoogleCMReplacesC2Dm">"Google Cloud Messaging for Android (GCM) Unveiled, to Replace C2DM Framework"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">October 15,</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=Google+Cloud+Messaging+for+Android+%28GCM%29+Unveiled%2C+to+Replace+C2DM+Framework&amp;rft.date=2012-08-12&amp;rft.aulast=Rubio&amp;rft.aufirst=Daniel&amp;rft_id=http%3A%2F%2Fwww.infoq.com%2Fnews%2F2012%2F08%2FGoogleCMReplacesC2Dm&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AAndroid+Cloud+to+Device+Messaging" class="Z3988"></span></span> </li> <li id="cite_note-GoogleDeprecated-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-GoogleDeprecated_3-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://developers.google.com/android/c2dm/">"Cloud to Device Messaging (Deprecated)"</a>. Google Inc<span class="reference-accessdate">. Retrieved <span class="nowrap">October 15,</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=Cloud+to+Device+Messaging+%28Deprecated%29&amp;rft.pub=Google+Inc.&amp;rft_id=https%3A%2F%2Fdevelopers.google.com%2Fandroid%2Fc2dm%2F&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AAndroid+Cloud+to+Device+Messaging" class="Z3988"></span></span> </li> <li id="cite_note-ProfessionalDevBook-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-ProfessionalDevBook_4-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFMeier2012" class="citation book cs1">Meier, Reto (March 22, 2012). <span class="id-lock-registration" title="Free registration required"><a rel="nofollow" class="external text" href="https://archive.org/details/professionalandr0000meie"><i>Professional Android 4 Application Development</i></a></span>. 2. Indianapolis, Indiana: John Wiley and Sons, Inc. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-1118102275" title="Special:BookSources/978-1118102275"><bdi>978-1118102275</bdi></a><span class="reference-accessdate">. Retrieved <span class="nowrap">October 15,</span> 2015</span>. <q>c2dm registration id.</q></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Professional+Android+4+Application+Development&amp;rft.place=Indianapolis%2C+Indiana&amp;rft.series=2&amp;rft.pub=John+Wiley+and+Sons%2C+Inc.&amp;rft.date=2012-03-22&amp;rft.isbn=978-1118102275&amp;rft.aulast=Meier&amp;rft.aufirst=Reto&amp;rft_id=https%3A%2F%2Farchive.org%2Fdetails%2Fprofessionalandr0000meie&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AAndroid+Cloud+to+Device+Messaging" class="Z3988"></span></span> </li> <li id="cite_note-GoogleMigration-5"><span class="mw-cite-backlink">^ <a href="#cite_ref-GoogleMigration_5-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-GoogleMigration_5-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20150906095043/https://developers.google.com/cloud-messaging/c2dm">"Migration from C2DM"</a>. Google Inc. Archived from <a rel="nofollow" class="external text" href="https://developers.google.com/cloud-messaging/c2dm">the original</a> on September 6, 2015<span class="reference-accessdate">. Retrieved <span class="nowrap">October 15,</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=Migration+from+C2DM&amp;rft.pub=Google+Inc.&amp;rft_id=https%3A%2F%2Fdevelopers.google.com%2Fcloud-messaging%2Fc2dm&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AAndroid+Cloud+to+Device+Messaging" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Android_Cloud_to_Device_Messaging&amp;action=edit&amp;section=4" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><span class="official-website"><span class="url"><a rel="nofollow" class="external text" href="https://developers.google.com/android/c2dm/">Official website</a></span></span> </p> <div 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<ul><li><a href="/wiki/Droid_(typeface)" title="Droid (typeface)">Droid</a></li> <li><a href="/wiki/Roboto" title="Roboto">Roboto</a></li> <li><a href="/wiki/Noto_fonts" title="Noto fonts">Noto</a></li></ul></li> <li><a href="/wiki/Google_Developers" title="Google Developers">Google Developers</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/OpenBinder" title="OpenBinder">OpenBinder</a></li> <li><a href="/wiki/Apache_Harmony" title="Apache Harmony">Apache Harmony</a></li> <li><a href="/wiki/OpenJDK" title="OpenJDK">OpenJDK</a></li> <li><a href="/wiki/Gradle" title="Gradle">Gradle</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Integrated_development_environment" title="Integrated development environment">Integrated development<br />environments</a> (IDE)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Android_Studio" title="Android Studio">Android Studio</a> <ul><li><a href="/wiki/IntelliJ_IDEA" title="IntelliJ IDEA">IntelliJ IDEA</a></li></ul></li> <li><a href="/wiki/Eclipse_(software)" title="Eclipse (software)">Eclipse</a> <ul><li><a href="/wiki/Eclipse_(software)#Android_Development_Tools" title="Eclipse (software)">Android Development Tools</a> (ADT)</li></ul></li> <li><a href="/wiki/MIT_App_Inventor" title="MIT App Inventor">MIT App Inventor</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Programming_language" title="Programming language">Languages</a>, <a href="/wiki/Database" title="Database">databases</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Java_(programming_language)" title="Java (programming language)">Java</a></li> <li><a href="/wiki/Kotlin_(programming_language)" title="Kotlin (programming language)">Kotlin</a></li> <li><a href="/wiki/XML" title="XML">XML</a></li> <li><a href="/wiki/C_(programming_language)" title="C (programming language)">C</a></li> <li><a href="/wiki/C%2B%2B" title="C++">C++</a></li> <li><a href="/wiki/SQLite" title="SQLite">SQLite</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Extended_reality" title="Extended reality">Extended reality</a> (XR)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Android_XR" title="Android XR">Android XR</a></li> <li><a href="/wiki/Google_Cardboard" title="Google Cardboard">Cardboard</a></li> <li><a href="/wiki/Google_Daydream" title="Google Daydream">Daydream</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Events, <a href="/wiki/Community_of_practice" title="Community of practice">communities</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Google_I/O" title="Google I/O">Google I/O</a></li> <li><a href="/wiki/Android_Developer_Challenge" title="Android Developer Challenge">Developer Challenge</a></li> <li><a href="/wiki/Android_Developer_Lab" title="Android Developer Lab">Developer Lab</a></li> <li><a href="/wiki/Android_(operating_system)#Development" title="Android (operating system)">Android Open Source Project</a> (AOSP)</li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Android_version_history" title="Android version history">Releases</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Android_Cupcake" title="Android Cupcake">Cupcake (1.5)</a></li> <li><a href="/wiki/Android_Donut" title="Android Donut">Donut (1.6)</a></li> <li><a href="/wiki/Android_Eclair" title="Android Eclair">Eclair (2.0–2.1)</a></li> <li><a href="/wiki/Android_Froyo" title="Android Froyo">Froyo (2.2)</a></li> <li><a href="/wiki/Android_Gingerbread" title="Android Gingerbread">Gingerbread (2.3)</a></li> <li><a href="/wiki/Android_Honeycomb" title="Android Honeycomb">Honeycomb (3.x)</a></li> <li><a href="/wiki/Android_Ice_Cream_Sandwich" title="Android Ice Cream Sandwich">Ice Cream Sandwich (4.0)</a></li> <li><a href="/wiki/Android_Jelly_Bean" title="Android Jelly Bean">Jelly Bean (4.1–4.3)</a></li> <li><a href="/wiki/Android_KitKat" title="Android KitKat">KitKat (4.4)</a></li> <li><a href="/wiki/Android_Lollipop" title="Android Lollipop">Lollipop (5.x)</a></li> <li><a href="/wiki/Android_Marshmallow" title="Android Marshmallow">Marshmallow (6.0)</a></li> <li><a href="/wiki/Android_Nougat" title="Android Nougat">Nougat (7.x)</a></li> <li><a href="/wiki/Android_Oreo" title="Android Oreo">Oreo (8.x)</a></li> <li><a href="/wiki/Android_Pie" title="Android Pie">Pie (9)</a></li> <li><a href="/wiki/Android_10" title="Android 10">10</a></li> <li><a href="/wiki/Android_11" title="Android 11">11</a></li> <li><a href="/wiki/Android_12" title="Android 12">12</a></li> <li><a href="/wiki/Android_13" title="Android 13">13</a></li> <li><a href="/wiki/Android_14" title="Android 14">14</a></li> <li><a href="/wiki/Android_15" title="Android 15">15</a></li> <li><a href="/wiki/Android_16" title="Android 16">16</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Derivatives</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Android_Automotive" title="Android Automotive">Android Automotive</a></li> <li><a href="/wiki/Android_Things" title="Android Things">Android Things</a></li> <li><a href="/wiki/Android_TV" title="Android TV">TV</a> <ul><li><a href="/wiki/List_of_Android_TV_devices" title="List of Android TV devices">devices</a></li></ul></li> <li><a href="/wiki/Android_XR" title="Android XR">Android XR</a></li> <li><a href="/wiki/Wear_OS" title="Wear OS">Wear OS</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Devices</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Google_Pixel" title="Google Pixel">Pixel</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Pixel_C" title="Pixel C">C</a></li> <li><a href="/wiki/Pixel_(1st_generation)" title="Pixel (1st generation)">Pixel &amp; Pixel XL</a></li> <li><a href="/wiki/Pixel_2" title="Pixel 2">2 &amp; 2 XL</a></li> <li><a href="/wiki/Pixel_3" title="Pixel 3">3 &amp; 3 XL</a> <ul><li><a href="/wiki/Pixel_3a" title="Pixel 3a">3a &amp; 3a XL</a></li></ul></li> <li><a href="/wiki/Pixel_4" title="Pixel 4">4 &amp; 4 XL</a> <ul><li><a href="/wiki/Pixel_4a" title="Pixel 4a">4a &amp; 4a (5G)</a></li></ul></li> <li><a href="/wiki/Pixel_5" title="Pixel 5">5</a> <ul><li><a href="/wiki/Pixel_5a" title="Pixel 5a">5a</a></li></ul></li> <li><a href="/wiki/Pixel_6" title="Pixel 6">6 &amp; 6 Pro</a> <ul><li><a href="/wiki/Pixel_6a" title="Pixel 6a">6a</a></li></ul></li> <li><a href="/wiki/Pixel_7" title="Pixel 7">7 &amp; 7 Pro</a> <ul><li><a href="/wiki/Pixel_7a" title="Pixel 7a">7a</a></li></ul></li> <li><a href="/wiki/Pixel_Fold" title="Pixel Fold">Fold</a></li> <li><a href="/wiki/Pixel_Tablet" title="Pixel Tablet">Tablet</a></li> <li><a href="/wiki/Pixel_8" title="Pixel 8">8 &amp; 8 Pro</a> <ul><li><a href="/wiki/Pixel_8a" title="Pixel 8a">8a</a></li></ul></li> <li><a href="/wiki/Pixel_8" title="Pixel 8">9, 9 Pro &amp; 9 Pro XL</a> <ul><li><a href="/wiki/Pixel_9_Pro_Fold" title="Pixel 9 Pro Fold">9 Pro Fold</a></li> <li><a href="/w/index.php?title=Pixel_9a&amp;action=edit&amp;redlink=1" class="new" title="Pixel 9a (page does not exist)">9a</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Google_Nexus" title="Google Nexus">Nexus</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Nexus_One" title="Nexus One">One</a></li> <li><a href="/wiki/Nexus_S" title="Nexus S">S</a></li> <li><a href="/wiki/Galaxy_Nexus" title="Galaxy Nexus">Galaxy Nexus</a></li> <li><a href="/wiki/Nexus_4" title="Nexus 4">4</a></li> <li><a href="/wiki/Nexus_10" title="Nexus 10">10</a></li> <li><a href="/wiki/Nexus_Q" title="Nexus Q">Q</a></li> <li><a href="/wiki/Nexus_5" title="Nexus 5">5</a> <ul><li><a href="/wiki/Nexus_5X" title="Nexus 5X">5X</a></li></ul></li> <li><a href="/wiki/Nexus_6" title="Nexus 6">6</a> <ul><li><a href="/wiki/Nexus_6P" title="Nexus 6P">6P</a></li></ul></li> <li>7 <ul><li><a href="/wiki/Nexus_7_(2012)" title="Nexus 7 (2012)">2012</a></li> <li><a href="/wiki/Nexus_7_(2013)" title="Nexus 7 (2013)">2013</a></li></ul></li> <li><a href="/wiki/Nexus_9" title="Nexus 9">9</a></li> <li><a href="/wiki/Nexus_Player" title="Nexus Player">Player</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/List_of_Google_Play_edition_devices" title="List of Google Play edition devices">Play edition</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/HTC_One_(M7)" title="HTC One (M7)">HTC One (M7)</a></li> <li><a href="/wiki/HTC_One_(M8)" title="HTC One (M8)">HTC One (M8)</a></li> <li><a href="/wiki/LG_G_Pad_8.3" title="LG G Pad 8.3">LG G Pad 8.3</a></li> <li><a href="/wiki/Moto_G_(1st_generation)" title="Moto G (1st generation)">Moto G</a></li> <li><a href="/wiki/Samsung_Galaxy_S4" title="Samsung Galaxy S4">Samsung Galaxy S4</a></li> <li><a href="/wiki/Sony_Xperia_Z_Ultra" title="Sony Xperia Z Ultra">Sony Xperia Z Ultra</a></li></ul> </div></td></tr><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Android_One" title="Android One">Android One</a></li> <li><a href="/wiki/List_of_Android_smartphones" title="List of Android smartphones">other smartphones</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/List_of_custom_Android_distributions" title="List of custom Android distributions">Custom<br />distributions</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/AliOS" title="AliOS">AliOS</a></li> <li><a href="/wiki/Android-x86" title="Android-x86">Android-x86</a> <ul><li><a href="/wiki/Remix_OS" title="Remix OS">Remix OS</a></li></ul></li> <li><a href="/wiki/AOKP" title="AOKP">AOKP</a></li> <li><a href="/wiki/Baidu_Yi" title="Baidu Yi">Baidu Yi</a></li> <li><a href="/wiki/Barnes_%26_Noble_Nook" title="Barnes &amp; Noble Nook">Barnes &amp; Noble Nook</a></li> <li><a href="/wiki/CalyxOS" title="CalyxOS">CalyxOS</a></li> <li><a href="/wiki/ColorOS" title="ColorOS">ColorOS</a> <ul><li><a href="/wiki/Realme" title="Realme">realme UI</a></li></ul></li> <li><a href="/wiki/CopperheadOS" title="CopperheadOS">CopperheadOS</a></li> <li><a href="/wiki/EMUI" title="EMUI">EMUI</a> <ul><li><a href="/wiki/Honor_(brand)" title="Honor (brand)">Magic UI</a></li></ul></li> <li><a href="/wiki/Fire_OS" title="Fire OS">Fire OS</a></li> <li><a href="/wiki/Meizu#Flyme" title="Meizu">Flyme OS</a></li> <li><a href="/wiki/GrapheneOS" title="GrapheneOS">GrapheneOS</a></li> <li><a href="/wiki/Xiaomi_HyperOS" title="Xiaomi HyperOS">Xiaomi HyperOS</a> <ul><li><a href="/wiki/MIUI" title="MIUI">MIUI</a></li> <li><a href="/wiki/Poco_(company)" class="mw-redirect" title="Poco (company)">MIUI for Poco</a></li></ul></li> <li><a href="/wiki/LeWa_OS" title="LeWa OS">LeWa OS</a></li> <li><a href="/wiki/LineageOS" title="LineageOS">LineageOS</a> <ul><li><a href="/wiki//e/_(operating_system)" title="/e/ (operating system)">/e/</a></li> <li><a href="/wiki/CrDroid" title="CrDroid">CrDroid</a></li> <li><a href="/wiki/CyanogenMod" title="CyanogenMod">CyanogenMod</a></li> <li><a href="/wiki/DivestOS" title="DivestOS">DivestOS</a></li> <li><a href="/wiki/Iod%C3%A9OS" title="IodéOS">iodéOS</a></li> <li><a href="/wiki/Kali_NetHunter" title="Kali NetHunter">Kali NetHunter</a></li></ul></li> <li><a href="/wiki/LiteOS" title="LiteOS">LiteOS</a></li> <li><a href="/wiki/Meta_Horizon_OS" title="Meta Horizon OS">Meta Horizon OS</a></li> <li><a href="/wiki/MicroG" title="MicroG">MicroG</a></li> <li><a href="/wiki/Nokia_X_family#Nokia_X_software_platform" title="Nokia X family">Nokia X software platform</a></li> <li><a href="/wiki/OmniROM" title="OmniROM">OmniROM</a></li> <li><a href="/wiki/OPhone" title="OPhone">OPhone</a></li> <li><a href="/wiki/OxygenOS" title="OxygenOS">OxygenOS</a></li> <li><a href="/wiki/PixelExperience" title="PixelExperience">PixelExperience</a></li> <li><a href="/wiki/Google_Pixel#Pixel_UI_(Pixel_Launcher)" title="Google Pixel">Pixel UI</a></li> <li><a href="/wiki/Replicant_(operating_system)" title="Replicant (operating system)">Replicant</a></li> <li><a href="/wiki/Resurrection_Remix_OS" title="Resurrection Remix OS">Resurrection Remix OS</a></li> <li><a href="/wiki/SlimRoms" title="SlimRoms">SlimRoms</a></li> <li><a href="/wiki/TCL_Technology" title="TCL Technology">TCL UI</a></li> <li><a href="/wiki/Ubuntu_Touch#Ubuntu_for_Android" title="Ubuntu Touch">Ubuntu for Android</a></li> <li><a href="/wiki/XobotOS" title="XobotOS">XobotOS</a></li> <li><a href="/wiki/Lenovo_smartphones" title="Lenovo smartphones">ZUI</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Booting and<br />recovery</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Booting_process_of_Android_devices" title="Booting process of Android devices">Booting process</a></li> <li><a href="/wiki/Android_recovery_mode" title="Android recovery mode">Recovery mode</a> <ul><li><a href="/wiki/TWRP_(software)" title="TWRP (software)">TWRP</a></li> <li><a href="/wiki/ClockworkMod" title="ClockworkMod">ClockworkMod</a></li></ul></li> <li><a href="/wiki/Fastboot" title="Fastboot">Fastboot</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/API" title="API">APIs</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Google_Maps" title="Google Maps">Google Maps</a></li> <li><a href="/wiki/Google_Play_Services" title="Google Play Services">Google Play Services</a> <ul><li><a href="/wiki/SafetyNet" title="SafetyNet">SafetyNet</a></li></ul></li> <li><a href="/wiki/Google_Search" title="Google Search">Google Search</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Alternative <a href="/wiki/User_interface" title="User interface">UIs</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Asus_ZenFone" title="Asus ZenFone">Asus ZenFone</a></li> <li><a href="/wiki/Cherry_OS_(operating_system)" title="Cherry OS (operating system)">Cherry OS</a></li> <li><a href="/wiki/ColorOS" title="ColorOS">ColorOS</a></li> <li><a href="/wiki/EMUI" title="EMUI">EMUI</a></li> <li><a href="/wiki/Funtouch_OS" title="Funtouch OS">Funtouch OS</a></li> <li><a href="/wiki/Meizu#Flyme" title="Meizu">Flyme OS</a></li> <li><a href="/wiki/HiOS" title="HiOS">HiOS</a></li> <li><a href="/wiki/Hive_UI" title="Hive UI">Hive UI (XOLO Hive)</a></li> <li><a href="/wiki/HTC_Sense" title="HTC Sense">HTC Sense</a></li> <li><a href="/wiki/LG_UX" title="LG UX">LG UX</a> <ul><li><a href="/wiki/Optimus_UI" title="Optimus UI">Optimus UI</a></li></ul></li> <li><a href="/wiki/Motoblur" title="Motoblur">Motoblur</a></li> <li><a href="/wiki/One_UI" title="One UI">One UI</a></li> <li><a href="/wiki/Origin_OS" title="Origin OS">Origin OS</a> <ul><li><a href="/wiki/Samsung_Experience" title="Samsung Experience">Experience</a></li> <li><a href="/wiki/TouchWiz" title="TouchWiz">TouchWiz</a></li></ul></li> <li><a href="/wiki/OxygenOS" title="OxygenOS">OxygenOS</a></li> <li><a href="/wiki/Google_Pixel#Pixel_UI_(Pixel_Launcher)" title="Google Pixel">Pixel UI</a></li> <li><a href="/wiki/XOS_(operating_system)" title="XOS (operating system)">XOS</a></li> <li>Xperia UI</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Rooting_(Android)" title="Rooting (Android)">Rooting</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/SuperSU" title="SuperSU">SuperSU</a></li> <li><a href="/wiki/Magisk_(software)" title="Magisk (software)">Magisk</a></li> <li><a href="/wiki/Kingo_Root" title="Kingo Root">Kingo Root</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Lists</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_custom_Android_distributions" title="List of custom Android distributions">Custom distributions</a></li> <li><a href="/wiki/List_of_features_in_Android" title="List of features in Android">Features</a></li> <li><a href="/wiki/List_of_free_and_open-source_Android_applications" title="List of free and open-source Android applications">Free and open-source applications</a></li> <li><a href="/wiki/List_of_Android_apps_by_Google" title="List of Android apps by Google">Google apps</a></li> <li><a href="/wiki/List_of_Android_launchers" title="List of Android launchers">Launchers</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related topics</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Index_of_Android_OS_articles" title="Index of Android OS articles">Index of articles</a></li> <li><a href="/wiki/Androidland" title="Androidland">Androidland</a></li> <li><a href="/wiki/Chromecast" title="Chromecast">Chromecast</a></li> <li><a href="/wiki/Google" title="Google">Google</a></li> <li><a href="/wiki/Comparison_of_Java_and_Android_API" title="Comparison of Java and Android API">Java vs. Android API</a></li> <li><a href="/wiki/Android_lawn_statues" title="Android lawn statues">Lawn statues</a></li> <li><a href="/wiki/BlueStacks" title="BlueStacks">BlueStacks</a></li> <li>Legal issues <ul><li><i><a href="/wiki/Google_LLC_v._Oracle_America,_Inc." title="Google LLC v. Oracle America, Inc.">Google v. 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