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| <p>Welcome to the Android core technologies section of the site. Here you |
| can find information on common features useful to people and organizations who |
| are looking to modify, contribute to, or port the Android software. This is |
| "under the hood" information intended for engineers.</p> |
| |
| <h2 id="art-technical-information">ART and Dalvik</h2> |
| <p>The Android runtime (ART) is the heart of Android. It's a fast, ahead-of-time |
| compiled runtime with modern garbage collection designed to scale. |
| Android applications are compiled to Dalvik bytecode and run with ART. This |
| section includes detailed information such as the Dalvik Executable format |
| specification, and design information on the runtime itself.</p> |
| <p><a href="/devices/tech/dalvik/index.html">» ART and Dalvik |
| Information</a></p> |
| |
| <h2 id="config">Configuration</h2> |
| <p>Getting the most out of Android requires tuning of the <a |
| href="/devices/tech/config/kernel.html">kernel</a>, <a |
| href="/devices/tech/config/renderer.html">OpenGLRenderer</a>, and |
| more. See the subpages of this section for details. |
| <p><a href="/devices/tech/config/index.html">» Configuration |
| Information</a></p> |
| |
| <h2 id="connect">Connectivity</h2> |
| <p>This section covers Android support for NFC standards (such as Felica), |
| provides details on the Radio Interface Layer (RIL), describes call notification |
| behavior, and gives implementation instructions for user-facing features such as |
| Data Saver and phone number blocking.</p> |
| <p><a href="/devices/tech/connect/index.html">» Connectivity |
| Information</a></p> |
| |
| <h2 id="data-usage-technical-information">Data Usage</h2> |
| <p>Android's data usage features allow users to understand and control how |
| their device uses network data. This section is designed for systems |
| integrators and mobile operators to help explain technical details they |
| should be aware of when porting Android to specific devices.</p> |
| <p><a href="/devices/tech/datausage/index.html">» Data Usage |
| Information</a></p> |
| |
| <h2 id="debugging">Debugging</h2> |
| <p>Android is a large and complex system. This section includes tips and tricks |
| for debugging at the platform level.</p> |
| <p><a href="/devices/tech/debug/index.html">» Debugging |
| Information</a></p> |
| |
| <h2 id="admin-information">Device Administration</h2> |
| <p>Since Android 5.0, the platform supports use cases in a corporate |
| environment under the auspices of each company’s information technology (IT) |
| department.</p> |
| <p><a href="/devices/tech/admin/index.html">» Device |
| administration information</a></p> |
| |
| <h2 id="display">Display Settings</h2> |
| <p>This section covers AOSP implementation of various Android display |
| settings, including app shortcuts, circular launcher icons, do not disturb |
| (DND), multi-window (split-screen, free-form, and picture-in-picture), high |
| dynamic range (HDR) video, night light, and retail demo mode.</p> |
| <p><a href="/devices/tech/display/index.html">» Display settings |
| information</a></p> |
| |
| <h2 id="HAL-technical-information">HAL File Reference</h2> |
| <p>Android's Hardware Abstraction Layer (HAL) provides the interface between |
| software APIs and hardware drivers. This section contains the commented code |
| files of the HAL.</p> |
| <p><a href="/reference/hal/">» HAL Reference</a></p> |
| |
| <h2 id="ota-technical-information">OTA Updates</h2> |
| <p>Android devices in the field can receive and install over-the-air (OTA) |
| updates to the system and application software. This section describes the |
| structure of update packages and the tools to build them. It is intended for |
| developers building OTA updates for new and released Android devices.</p> |
| <p><a href="/devices/tech/ota/index.html">» OTA Information</a> |
| </p> |
| |
| <h2 id="power-technical-information">Power</h2> |
| <p>The framework provides battery usage statistics, keeping track of time spent |
| by different device components in different states. This section covers power |
| management features (such as Doze), gives instructions for accurately measuring |
| device and component power (and how to determine power values), and details the |
| <code>batterystats</code> command and output.</p> |
| <p><a href="/devices/tech/power/index.html">» Power |
| Information</a></p> |
| |
| <h2 id="tradefed-test-infrastructure">Trade Federation Testing Infrastructure |
| </h2> |
| <p>Trade Federation is a continuous test framework for running tests on |
| Android devices. Trade Federation's modularity makes it straightforward to |
| slot into environments with existing build, test, and reporting |
| infrastructures.</p> |
| <p><a href="/devices/tech/test_infra/tradefed/index.html"> |
| » Trade Federation Testing Infrastructure Overview</a></p> |
| |
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