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<h1 itemprop="name" style="margin-bottom:0;">Welcome to the Android Open Source Project!</h1>
<p>
Android is an open-source software stack for a wide range of mobile devices and a corresponding open-source project led by
Google. Here you can find the information and source code you need to learn more about the Android platform. From there you can
create custom variants of the Android software stack, port devices and accessories to the Android platform,
and ensure your devices are compatible with the Android compatibility definition.
</p>
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<h3>What's New</h3>
<a href="{@docRoot}source/build-numbers.html">
<h4>Lollipop API level, build tag updated</h4></a>
<p>The latest <strong><a
href="{@docRoot}source/build-numbers.html#platform-code-names-versions-api-levels-and-ndk-releases">Lollipop
API level</a></strong> and <strong><a
href="{@docRoot}source/build-numbers.html#source-code-tags-and-builds">build
tag</a></strong> have been updated to 22 and LMY47D, respectively.</p>
<a href="{@docRoot}compatibility/contact-us.html">
<h4>Google Mobile Services inquiry form added</h4></a>
<p>Prospective Google Mobile Services (GMS) partners now have an online <strong><a
href="https://docs.google.com/a/google.com/forms/d/1qAHuR-MbmXeYuJ1aBd3neaUjNGxnnnCd2kzb0MEJpGQ/viewform"
target="_blank">inquiry form</a></strong> to request a GMS license.</p>
<a href="{@docRoot}devices/tech/dalvik/constraints.html">
<h4>Dalvik constraints published</h4></a>
<p>The Android Runtime (ART) team has released a list of syntactical and semantical <strong><a
href="{@docRoot}devices/tech/dalvik/constraints.html">constraints</a></strong>
to help construct valid <code>.dex</code> files supported by the runtime.</p>
<a href="{@docRoot}source/64-bit-builds.html">
<h4>64-bit build instructions added</h4></a>
<p>Detailed instructions for building Android on a <strong><a
href="{@docRoot}source/64-bit-builds.html">64-bit
architecture</a></strong> have been added to the <em>Source</em> section of the
site. These instructions cover product configuration, module definition, the
install path, and more.</p>
<a href="{@docRoot}devices/graphics/DeqpUserGuide.pdf">
<h4>OpenGL ES graphics diagnostics documented</h4></a>
<p>The site now contains a <strong><a
href="{@docRoot}devices/graphics/DeqpUserGuide.pdf">user guide for the
GPU testing suite drawElements Quality Program (deqp)</a></strong>. The
guide offers an overview of the suite and instructions for porting and building
the test modules.</p>
<a href="{@docRoot}source/building.html">
<h4>Ubuntu version and Eclipse instructions updated</h4></a>
<p>The recommended version of <strong><a
href="{@docRoot}source/initializing.html#installing-required-packages-ubuntu-1404">Ubuntu
LTS</a></strong> has been increased from 12.04 to 14.04. Similarly, the
<strong><a href="{@docRoot}source/using-eclipse.html#create-project">Creating a
project section of Using Eclipse</a></strong> has been revised to replace an
outdated step.</p>
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<h3>Getting Started</h3>
<a href="{@docRoot}source/index.html">
<h4>Explore the Source</h4></a>
<p>Get the complete Android platform and modify and build it to suit your needs. You can
also <strong><a
href="https://android-review.googlesource.com/#/q/status:open">contribute
to</a></strong> the <strong><a
href="https://android.googlesource.com/">Android Open Source Project (AOSP)
repository</a></strong> to make your changes available to everyone else
in the Android ecosystem.</p>
<a href="{@docRoot}source/index.html"><img border="0" src="images/android_framework_small.png" alt="Android framework summary" style="display:inline;float:left;margin:5px 10px"></a>
<a href="{@docRoot}devices/index.html">
<h4>Port Android to Devices</h4></a>
<p>Port the latest Android platform and
create compelling devices that your customers want.</p>
<a href="{@docRoot}accessories/index.html">
<h4>Build Accessories</h4></a>
<p>Sometimes, a device can't do it all. Tap into Android's open accessory standard and build accessories to complement the wide variety of Android-powered devices.</p>
<a href="{@docRoot}compatibility/index.html">
<h4>Get Compatible</h4></a>
<p>Being Android-compatible lets you offer custom features but still give users and developers a consistent
and standard experience across all Android-powered devices. Android provides guidance
and a test suite to verify your Android compatibility.</p>
<a href="https://android.googlesource.com/platform/docs/source.android.com/">
<h4>Help this Site</h4></a>
<p>Please note, source.android.com is maintained in the Android Open Source Project. See the <strong><a
href="https://android.googlesource.com/platform/docs/source.android.com/+log/master">docs/source.android.com
project log in AOSP</a></strong> for the complete list of changes to this site.
Contribute your own updates to that same project and help maintain source.android.com.</p>
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