1 fullpage=true 2 no_footer_links=true 3 landing.page=true 4 page.metaDescription=The official site for the Android Open Source Project. 5 header.hide=1 6 @jd:body 7 8 <!-- 9 Copyright 2016 The Android Open Source Project 10 11 Licensed under the Apache License, Version 2.0 (the "License"); 12 you may not use this file except in compliance with the License. 13 You may obtain a copy of the License at 14 15 http://www.apache.org/licenses/LICENSE-2.0 16 17 Unless required by applicable law or agreed to in writing, software 18 distributed under the License is distributed on an "AS IS" BASIS, 19 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 20 See the License for the specific language governing permissions and 21 limitations under the License. 22 --> 23 <div class="wrap"> 24 25 <div class="landing-banner"> 26 <h1 itemprop="name" style="margin-bottom:0;">Welcome to the Android Open Source Project!</h1> 27 28 <p>Android is an open source software stack for a wide range of mobile devices 29 and a corresponding open source project led by Google. This site and the Android 30 Open Source Project (AOSP) repository offer the information and source code you 31 need to create custom variants of the Android stack, port devices and 32 accessories to the Android platform, and ensure your devices meet compatibility 33 requirements.</p> 34 35 <h2 align="center">Android 7.1 Updates Available</h2> 36 37 </div> 38 39 </div> 40 41 <div class="wrap"> 42 43 <div class="landing-docs"> 44 <div class="col-8"> 45 <h3>What's New</h3> 46 47 <h4>March Android Security Bulletin</h4> 48 <p>The <strong><a href="{@docRoot}security/bulletin/2017-03-01.html">March 49 2017 Android Security Bulletin</a></strong> has been published along with links 50 to associated fixes. In addition, new 51 <strong><a href="{@docRoot}source/build-numbers.html#source-code-tags-and-builds">build 52 numbers</a></strong> have been published for Nexus 6 running Android 7.0 and 53 7.1.1 and also Pixel, Pixel XL, Pixel C, Nexus 5X, Nexus 6P, Nexus 9, and Nexus 54 Player running Android 7.1.1 to support the March Android security release.</p> 55 56 <h4>Systems Testing With VTS</h4> 57 <p>The Vendor Test Suite (VTS) automates HAL and OS kernel testing. 58 <strong><a href="{@docRoot}devices/tech/test_infra/tradefed/fundamentals/vts.html">New 59 documentation</a></strong> covers how to use VTS to test an Android native 60 system implementation, set up a testing environment then test a patch using 61 a VTS plan.</p> 62 63 <h4>New Dalvik Bytecodes and Formats</h4> 64 <p>Dalvik now offers new <strong><a 65 href="{@docRoot}devices/tech/dalvik/dalvik-bytecode.html">bytecode formats 45cc 66 and 4rcc</a></strong> and placeholder opcodes for <strong><a 67 href="{@docRoot}devices/tech/dalvik/instruction-formats.html">invoke-polymorphic 68 and invoke-polymorphic/range</a></strong>, which are the first dex instructions 69 that use these new formats. In addition to a method_idx that gives the invoked 70 method, these instructions also provide a proto_idx that gives the (static) 71 type signature of the call site.</p> 72 73 <h4>Background App Compilation in A/B System Updates</h4> 74 <p>Examples for 75 <strong><a href="{@docRoot}devices/tech/dalvik/configure.html#other_odex">installing</a></strong> and 76 <strong><a href="{@docRoot}devices/tech/ota/ab_updates.html#configuration">configuring</a></strong> 77 <code>otapreopt_script</code> have been added to explain how to use this tool 78 for optimizing user apps so they are ready to run after the device reboots 79 during an A/B system update.</p> 80 81 <h4>Android 7.1 CDD</h4> 82 <p>The <strong><a href="{@docRoot}compatibility/7.1/android-7.1-cdd.html">7.1 83 version</a></strong> of the <strong><a 84 href="{@docRoot}compatibility/cdd.html">Android Compatibility Definition 85 Document</a></strong> (CDD) has been published. See its <strong><a 86 href="https://android.googlesource.com/platform/compatibility/cdd/+log/nougat-mr1-dev/?pretty=full&no-merges">change 87 log</a></strong> for a summary of updates.</p> 88 89 <h4>Diagnosing Native Crashes</h4> 90 <p><strong><a 91 href="{@docRoot}devices/tech/debug/native-crash.html">Native crashes</a></strong> 92 are now described in detail, fully explaining the <strong><a 93 href="{@docRoot}devices/tech/debug/native-crash.html#crashtypes">types of 94 crashes</a></strong> expected and including the clues for finding them in 95 <code>debuggerd</code> output.</p> 96 97 </div> 98 99 <div class="col-8"> 100 101 <h3>Getting Started</h3> 102 <a href="{@docRoot}source/index.html"><h4>Explore the Source</h4></a> 103 <p>Get the complete Android platform and modify and build it to suit your needs. 104 You can also 105 <strong><a href="https://android-review.googlesource.com/#/q/status:open">contribute 106 to</a></strong> the <strong><a href="https://android.googlesource.com/">AOSP 107 repository</a></strong> to make your changes available to everyone else in the 108 Android ecosystem.</p> 109 110 <a href="{@docRoot}source/index.html"><img border="0" 111 src="images/android_framework_small.png" alt="Android framework summary" 112 style="display:inline;float:right;margin:5px 10px;width:42%;height:42%"></a> 113 114 <a href="{@docRoot}devices/index.html"><h4>Port Android to Devices</h4></a> 115 <p>Get help porting the latest Android platform to create compelling devices for 116 your customers. Includes documentation for HAL interfaces and details on core 117 technologies such as Android runtime (ART) and over-the-air (OTA) updates.</p> 118 119 <a href="{@docRoot}security/index.html"><h4>Make Secure</h4></a> 120 <p>Follow these examples and instructions to harden your Android devices against 121 malicious attacks. Find out how the Android security program works and learn how 122 to implement the latest features.</p> 123 124 <a href="{@docRoot}compatibility/index.html"><h4>Get Compatible</h4></a> 125 <p>Being Android-compatible lets you offer custom features but still give users 126 and developers a consistent and standard experience across all Android-powered 127 devices. Android provides guidance and a test suite to verify your Android 128 compatibility.</p> 129 130 <a href="https://android.googlesource.com/platform/docs/source.android.com/"> 131 <h4>Help this Site</h4></a> 132 <p>Use the <strong>Site Feedback</strong> button at the bottom of any page to 133 request content improvements or let us know about errors. To contribute your 134 own updates to the site or to view a complete list of site changes, use the AOSP 135 project 136 <strong><a href="https://android.googlesource.com/platform/docs/source.android.com/+log/master?no-merges">docs/source.android.com.</a></strong></p> 137 </div> 138 139 </div> 140 141 </div> 142
