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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>


            <h2 align="center">Android 6.0 Updates Available &mdash; see details below</h2>

            
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              <div class="landing-docs">

            
                <div class="col-8">

            
                <h3>What's New</h3>

            
            <a href="{@docRoot}devices/tech/power/index.html">

            
                    <h4>Doze and App Standby</h4></a>

            
                    <p>New battery-saving features <em>Doze</em> and <em>App Standby</em>

            
                    are described in <strong><a href="{@docRoot}devices/tech/power/mgmt.html">Power

            
                    Management</a></strong> while the remaining <strong><a

            
                    href="{@docRoot}devices/tech/power/index.html">Power</a></strong> section has

            
                    been revised.</p>


            <a href="{@docRoot}devices/tech/security/authentication/index.html">

            
                    <h4>Authentication</h4></a>

            
                    <p>An entirely new <strong><a

            
                    href="{@docRoot}devices/tech/security/authentication/index.html">Authentication</a></strong>

            
                    section describes the <strong><a

            
                    href="{@docRoot}devices/tech/security/authentication/fingerprint-hal.html">Fingerprint</a></strong>,

            
                    <strong><a

            
                    href="{@docRoot}devices/tech/security/authentication/gatekeeper.html">Gatekeeper</a></strong>,

            
                    and <strong><a

            
                    href="{@docRoot}devices/tech/security/authentication/keymaster.html">Keymaster</a></strong>

            
                    interfaces in detail, including a list of <strong><a

            
                    href="{@docRoot}devices/tech/security/authentication/km-features.html">Keymaster

            
                    features</a></strong> and an <strong><a

            
                    href="{@docRoot}devices/tech/security/authentication/km-implementer-ref.html">implementer’s

            
                    reference</a></strong>.</p>


            <a href="{@docRoot}devices/storage/index.html">

            
                    <h4>Adoptable Storage</h4></a>

            
                    <p>The <strong><a

            
                    href="{@docRoot}devices/storage/index.html">Storage</a></strong>

            
                    section has been revised to introduce <strong><a

            
                    href="{@docRoot}devices/storage/adoptable.html">adoptable

            
                    storage</a></strong> that can hold app data and distinguish between it and <strong><a

            
                    href="{@docRoot}devices/storage/traditional.html">traditional

            
                    storage</a></strong>.</p>


            <a href="{@docRoot}devices/tech/config/index.html">

            
                    <h4>Configuration</h4></a>

            
                    <p>Instructions now exist for configuring <strong><a

            
                    href="{@docRoot}devices/tech/config/runtime_perms.html">runtime permissions</a></strong>,

            
                    <strong><a href="{@docRoot}devices/tech/config/voicemail.html">visual

            
                    voicemail</a></strong>, and Android’s new <strong><a

            
                    href="{@docRoot}devices/tech/config/filesystem.html">file

            
                    system</a></strong>. And carriers get <strong><a

            
                    href="{@docRoot}devices/tech/config/carrier.html">custom

            
                    configuration</a></strong>.</p>


            <a href="{@docRoot}devices/tech/debug/index.html">

            
                    <h4>Tooling</h4></a>

            
                    <p>Information on the <strong><a href="{@docRoot}source/jack.html">Jack

            
                    (Java Android Compiler Kit)</a></strong> default toolchain in Android 6.0 is

            
                    available, as well as instructions for <strong><a

            
                    href="{@docRoot}devices/tech/dalvik/gc-debug.html">debugging garbage collection

            
                    in ART</a></strong>.</p>


            <a href="{@docRoot}devices/media/index.html">

            
                    <h4>Media</h4></a>

            
                    <p>The <strong><a

            
                    href="{@docRoot}devices/media/index.html">Media</a></strong> section now

            
                    contains descriptions of media resource manager dependencies for <strong><a

            
                    href="{@docRoot}devices/media/oem.html">OEMs</a></strong> and <strong><a

            
                    href="{@docRoot}devices/media/soc.html">SoC vendors</a></strong>.</p>


            <a href="{@docRoot}accessories/stylus.html">

            
                    <h4>Bluetooth Stylus</h4></a>

            
                    <p>The <strong><a

            
                    href="{@docRoot}accessories/index.html">Accessories</a></strong>

            
                    section now explains how to implement a <strong><a

            
                    href="{@docRoot}accessories/stylus.html">Bluetooth Stylus</a></strong>.</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>


            </div>
	fullpage=true
	no_footer_links=true
	landing.page=true
	page.metaDescription=The official site for the Android Open Source Project.
	header.hide=1
	@jd:body

	<!--
	Copyright 2015 The Android Open Source Project

	Licensed under the Apache License, Version 2.0 (the "License");
	you may not use this file except in compliance with the License.
	You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

	Unless required by applicable law or agreed to in writing, software
	distributed under the License is distributed on an "AS IS" BASIS,
	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	See the License for the specific language governing permissions and
	limitations under the License.
	-->
	<div class="wrap">

	<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>

	<h2 align="center">Android 6.0 Updates Available — see details below</h2>
	</div>

	</div>

	<div class="wrap">

	<div class="landing-docs">
	<div class="col-8">
	<h3>What's New</h3>
	<a href="{@docRoot}devices/tech/power/index.html">
	<h4>Doze and App Standby</h4></a>
	<p>New battery-saving features <em>Doze</em> and <em>App Standby</em>
	are described in <strong><a href="{@docRoot}devices/tech/power/mgmt.html">Power
	Management</a></strong> while the remaining <strong><a
	href="{@docRoot}devices/tech/power/index.html">Power</a></strong> section has
	been revised.</p>

	<a href="{@docRoot}devices/tech/security/authentication/index.html">
	<h4>Authentication</h4></a>
	<p>An entirely new <strong><a
	href="{@docRoot}devices/tech/security/authentication/index.html">Authentication</a></strong>
	section describes the <strong><a
	href="{@docRoot}devices/tech/security/authentication/fingerprint-hal.html">Fingerprint</a></strong>,
	<strong><a
	href="{@docRoot}devices/tech/security/authentication/gatekeeper.html">Gatekeeper</a></strong>,
	and <strong><a
	href="{@docRoot}devices/tech/security/authentication/keymaster.html">Keymaster</a></strong>
	interfaces in detail, including a list of <strong><a
	href="{@docRoot}devices/tech/security/authentication/km-features.html">Keymaster
	features</a></strong> and an <strong><a
	href="{@docRoot}devices/tech/security/authentication/km-implementer-ref.html">implementer’s
	reference</a></strong>.</p>

	<a href="{@docRoot}devices/storage/index.html">
	<h4>Adoptable Storage</h4></a>
	<p>The <strong><a
	href="{@docRoot}devices/storage/index.html">Storage</a></strong>
	section has been revised to introduce <strong><a
	href="{@docRoot}devices/storage/adoptable.html">adoptable
	storage</a></strong> that can hold app data and distinguish between it and <strong><a
	href="{@docRoot}devices/storage/traditional.html">traditional
	storage</a></strong>.</p>

	<a href="{@docRoot}devices/tech/config/index.html">
	<h4>Configuration</h4></a>
	<p>Instructions now exist for configuring <strong><a
	href="{@docRoot}devices/tech/config/runtime_perms.html">runtime permissions</a></strong>,
	<strong><a href="{@docRoot}devices/tech/config/voicemail.html">visual
	voicemail</a></strong>, and Android’s new <strong><a
	href="{@docRoot}devices/tech/config/filesystem.html">file
	system</a></strong>. And carriers get <strong><a
	href="{@docRoot}devices/tech/config/carrier.html">custom
	configuration</a></strong>.</p>

	<a href="{@docRoot}devices/tech/debug/index.html">
	<h4>Tooling</h4></a>
	<p>Information on the <strong><a href="{@docRoot}source/jack.html">Jack
	(Java Android Compiler Kit)</a></strong> default toolchain in Android 6.0 is
	available, as well as instructions for <strong><a
	href="{@docRoot}devices/tech/dalvik/gc-debug.html">debugging garbage collection
	in ART</a></strong>.</p>

	<a href="{@docRoot}devices/media/index.html">
	<h4>Media</h4></a>
	<p>The <strong><a
	href="{@docRoot}devices/media/index.html">Media</a></strong> section now
	contains descriptions of media resource manager dependencies for <strong><a
	href="{@docRoot}devices/media/oem.html">OEMs</a></strong> and <strong><a
	href="{@docRoot}devices/media/soc.html">SoC vendors</a></strong>.</p>

	<a href="{@docRoot}accessories/stylus.html">
	<h4>Bluetooth Stylus</h4></a>
	<p>The <strong><a
	href="{@docRoot}accessories/index.html">Accessories</a></strong>
	section now explains how to implement a <strong><a
	href="{@docRoot}accessories/stylus.html">Bluetooth Stylus</a></strong>.</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>

	</div>