1 page.title=Android Core Technologies 2 @jd:body 3 4 <!-- 5 Copyright 2015 The Android Open Source Project 6 7 Licensed under the Apache License, Version 2.0 (the "License"); 8 you may not use this file except in compliance with the License. 9 You may obtain a copy of the License at 10 11 http://www.apache.org/licenses/LICENSE-2.0 12 13 Unless required by applicable law or agreed to in writing, software 14 distributed under the License is distributed on an "AS IS" BASIS, 15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 See the License for the specific language governing permissions and 17 limitations under the License. 18 --> 19 <div id="qv-wrapper"> 20 <div id="qv"> 21 <h2>In this document</h2> 22 <ol id="auto-toc"> 23 </ol> 24 </div> 25 </div> 26 27 28 <p>Welcome to the Android core technologies section of the site. Here you 29 can find information on common features useful to people and organizations who 30 are looking to modify, contribute to, or port the Android software. This is 31 "under the hood" information intended for engineers.</p> 32 33 <h2 id="art-technical-information">ART and Dalvik</h2> 34 <p>The Android runtime (ART) is the heart of Android. It's a fast, ahead-of-time 35 compiled runtime with modern garbage collection designed to scale. 36 Android applications are compiled to Dalvik bytecode and run with ART. This 37 section includes detailed information such as the Dalvik Executable format 38 specification, and design information on the runtime itself.</p> 39 <p><a href="{@docRoot}devices/tech/dalvik/index.html">» ART and Dalvik 40 Information</a></p> 41 42 <h2 id="config">Configuration</h2> 43 <p>Getting the most out of Android requires tuning of the <a 44 href="{@docRoot}devices/tech/config/kernel.html">kernel</a>, <a 45 href="{@docRoot}devices/tech/config/renderer.html">OpenGLRenderer</a>, and 46 more. See the subpages of this section for details. 47 <p><a href="{@docRoot}devices/tech/config/index.html">» Configuration 48 Information</a></p> 49 50 <h2 id="data-usage-technical-information">Data Usage</h2> 51 <p>Android's data usage features allow users to understand and control how 52 their device uses network data. This section is designed for systems 53 integrators and mobile operators to help explain technical details they 54 should be aware of when porting Android to specific devices.</p> 55 <p><a href="{@docRoot}devices/tech/datausage/index.html">» Data Usage 56 Information</a></p> 57 58 <h2 id="debugging">Debugging</h2> 59 <p>Android is a large and complex system. This section includes tips and tricks 60 for debugging at the platform level.</p> 61 <p><a href="{@docRoot}devices/tech/debug/index.html">» Debugging 62 Information</a></p> 63 64 <h2 id="admin-information">Device Administration</h2> 65 <p>Since Android 5.0, the platform supports use cases in a corporate 66 environment under the auspices of each companys information technology (IT) 67 department.</p> 68 <p><a href="{@docRoot}devices/tech/admin/index.html">» Device 69 administration information</a></p> 70 71 <h2 id="HAL-technical-information">HAL File Reference</h2> 72 <p>Android's Hardware Abstraction Layer (HAL) provides the interface between 73 software APIs and hardware drivers. This section contains the commented code 74 files of the HAL.</p> 75 <p><a href="{@docRoot}devices/halref/files.html">» HAL Reference</a></p> 76 77 <h2 id="ota-technical-information">OTA Updates</h2> 78 <p>Android devices in the field can receive and install over-the-air (OTA) 79 updates to the system and application software. This section describes the 80 structure of update packages and the tools to build them. It is intended for 81 developers building OTA updates for new and released Android devices.</p> 82 <p><a href="{@docRoot}devices/tech/ota/index.html">» OTA Information</a> 83 </p> 84 85 <h2 id="power-technical-information">Power</h2> 86 <p>Battery usage statistics are tracked by the framework. This involves 87 keeping track of time spent by different device components in different states. 88 </p> 89 <p><a href="{@docRoot}devices/tech/power/index.html">» Power Information</a> 90 </p> 91 92 <h2 id="tradefed-test-infrastructure">Trade Federation Testing Infrastructure 93 </h2> 94 <p>Trade Federation is a continuous test framework for running tests on 95 Android devices. Trade Federation's modularity makes it straightforward to 96 slot into environments with existing build, test, and reporting 97 infrastructures.</p> 98 <p><a href="{@docRoot}devices/tech/test_infra/tradefed/index.html"> 99 » Trade Federation Testing Infrastructure Overview</a></p> 100
