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page.metaDescription=The official site for the Android Open Source Project.
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<div class="landing-banner">
<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>
</div>
</div>
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<div class="landing-docs">
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<h3>What's New</h3>
<a href="{@docRoot}devices/audio/index.html">
<h4>Audio terminology, latency, and USB documentation improved</h4></a>
<p><strong><a
href="{@docRoot}devices/audio/latency.html">Audio Latency</a></strong>
now describes rate-monotonic scheduling, security kernels, and power,
performance and thermal management. <strong><a
href="{@docRoot}devices/audio/usb.html">USB Digital Audio
</a></strong> covers debugging in host mode, and <strong><a
href="{@docRoot}devices/audio/terminology.html">Audio Terminology
</a></strong> defines FastCapture, jitter, overrun, panning, and more.</p>
<a href="{@docRoot}source/building.html">
<h4>Disk size requirements increased</h4></a>
<p>The amount of free disk space listed as required on <strong><a
href="{@docRoot}source/building.html">Downloading and
Building</a></strong> has been increased significantly.</p>
<a href="{@docRoot}source/build-numbers.html">
<h4>Supported devices and version strings updated</h4></a>
<p>The list of <strong><a
href="{@docRoot}source/build-numbers.html#source-code-tags-and-builds">supported
devices, branch tags</a></strong> and <strong><a
href="{@docRoot}compatibility/5.0/versions.html">version
strings</a></strong> for Android 5.0 have been updated.</p>
<a href="{@docRoot}source/initializing.html">
<h4>JDK instructions updated for Mac</h4></a>
<p>A new <strong><a
href="{@docRoot}source/initializing.html#installing-the-mac-jdk">Installing the
JDK</a></strong> section has been developed to describe Java installation for
Mac OS.</p>
<a href="{@docRoot}compatibility/downloads.html">
<h4>New CTS media files available for download</h4></a>
<p>Find <strong><a
href="https://dl.google.com/dl/android/cts/android-cts-media-1.1.zip">CTS media
files version 1.1</a></strong> for Android 5.0 media stress tests on <strong><a
href="{@docRoot}compatibility/downloads.html#cts-media-files">Compatibility
Downloads</a></strong>.</p>
<a href="{@docRoot}source/brands.html#Questions">
<h4>Android Partner Marketing offers brand guidance</h4></a>
<p>The Android Partner Marketing team now offers an easy-to-use <strong><a
href="https://support.google.com/googleplay/contact/brand_developer">Partner
Brand Inquiry Form</a></strong> for answers to branding questions and review
of marketing materials.</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
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>
</div>
</div>
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