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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>

<div class="wrap">

  <div class="landing-docs">
    <div class="col-8">
    <h3>What's New</h3>
<a href="{@docRoot}devices/tech/debug/dumpsys.html">
        <h4>Example Dumpsys Diagnostic Output</h4></a>
        <p>In addition to the aforementioned <strong><a
        href="{@docRoot}devices/input/diagnostics.html">Input
        Diagnostics</a></strong>, you can now find Dumpsys examples of usage
        data for <strong><a href="{@docRoot}devices/tech/ram/procstats.html">RAM
        (procstats)</a></strong>, <strong><a
        href="{@docRoot}devices/tech/netstats.html">network (netstats)</a></strong>,
        and <strong><a
        href="{@docRoot}devices/tech/power/batterystats.html">battery (batterystats)</a></strong>.</p>

<a href="{@docRoot}devices/audio/latency_measurements.html">
        <h4>Audio Latency Measurements</h4></a>
        <p>The Android audio team has published <strong><a
        href="{@docRoot}devices/audio/latency_measurements.html">round-trip audio latency
        measurements</a></strong> for select Nexus devices to help partners compare their
        own devices and reduce latency further.</p>

<a href="{@docRoot}devices/tech/power/index.html">
        <h4>Power Profile Details</h4></a>
        <p><strong><a
        href="{@docRoot}devices/tech/power/index.html">Power</a></strong>
        information has been moved and expanded to include details on
        <code>cpu.awake</code> and <code>cpu.active</code>. The need to create a
        <code>power_profile.xml</code> file is also emphasized throughout.</p>

<a href="{@docRoot}source/initializing.html">
        <h4>Initializing Improvements</h4></a>
        <p>Build environment <strong><a
        href="{@docRoot}source/initializing.html#setting-up-a-mac-os-x-build-environment">Initializing</a></strong>
        instructions now explain how to resize and unmount Mac OS sparse
        images. And the ccache section has been moved to an optional <strong><a
        href="{@docRoot}source/initializing.html#optimizing-a-build-environment">Optimizing
        a build environment</a></strong> section.</p>

<a href="{@docRoot}devices/tech/security/selinux/index.html">
        <h4>SELinux Permissive Declarations</h4></a>
        <p>SELinux <strong><a
        href="{@docRoot}devices/tech/security/selinux/customize.html">Customizing</a></strong>
        and <strong><a
        href="{@docRoot}devices/tech/security/selinux/implement.html">Implementing</a></strong>
        instructions have been updated to recommend using permissive declarations
        directly as <code>permissive_or_unconfined()</code> has been deprecated.
        Similarly, <code>BOARD_SEPOLICY_UNION</code> has been removed, so
        <code>BOARD_SEPOLICY_*</code> variables are suggested insead.</p>

<a href="{@docRoot}devices/bluetooth.html">
        <h4>Android 5.0 Bluetooth HCI Requirements</h4></a>
        <p><strong><a
        href="{@docRoot}devices/Android-5.0-Bluetooth-HCI-Reqs.pdf">Bluetooth
        Host Controller Interface (HCI) requirements</a></strong> to leverage
        the Bluetooth Low Energy APIs in Android 5.0 have
        been published and linked from the <strong><a
        href="{@docRoot}devices/bluetooth.html">Bluetooth</a></strong> introduction.</p>
    </div>

    <div class="col-8">
      <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>
    </div>

  </div>

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