Android SDK 21.0.0

The Android platform is a software stack for mobile devices including an operating system, middleware and key applications. Developers can create applications for the platform using the Android SDK. Applications are written using the Java programming language and run on Dalvik, a custom virtual machine designed for embedded use, which runs on top of a Linux kernel.

If you want to know how to develop applications for Android, you"re in the right place. This site provides a variety of documentation that will help you learn about Android and develop mobile applications for the platform.

Here are some key features of "Android SDK":

  • Application framework enabling reuse and replacement of components
  • Dalvik virtual machine optimized for mobile devices
  • Integrated browser based on the open source WebKit engine
  • Optimized graphics powered by a custom 2D graphics library; 3D graphics based on the OpenGL ES 1.0 specification (hardware acceleration optional)
  • SQLite for structured data storage
  • Media support for common audio, video, and still image formats (MPEG4, H.264, MP3, AAC, AMR, JPG, PNG, GIF)
  • GSM Telephony (hardware dependent)
  • Bluetooth, EDGE, 3G, and WiFi (hardware dependent)
  • Camera, GPS, compass, and accelerometer (hardware dependent)
  • Rich development environment including a device emulator, tools for debugging, memory and performance profiling, and a plugin for the Eclipse IDE
  • Not compatible with Gnu Compiler for Java (gcj)
  • For the base SDK package, at least 600MB of available disk space. For each platform downloaded into the SDK, an additional 100MB is needed.

What's New in This Release:

    Dependencies:
    • Android SDK Platform-tools revision 15 or later.
    • If you are developing in Eclipse with ADT, note that the SDK Tools r21 is designed for use with ADT 21.0.0 and later. If you haven"t already, update your ADT Plugin to 21.0.0.
    • If you are developing outside Eclipse, you must have Apache Ant 1.8 or later.

General Notes:

  • Build System
  • Added a flag that sets jumbo mode for DEX files, which allows a larger number of strings in the DEX files.
  • Improved the build time by pre-dexing libraries (both JAR files and library projects).
  • Updated the build to generate R resource classes for library projects with only the IDs needed by the libraries, reducing the risk of hitting DEX file limits for fields and methods.
  • Improved the build so that several editing features (code completion, resource chooser, go to declaration) properly handle library project resources.
  • Lint
  • Added over 25 new lint rules for resources, locale settings, layout files, incorrect use.
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  • Software Name:
  • Android SDK
  • Software Version:
  • 21.0.0
  • Released:
  • License:
  • Freeware
  • OS Supported:
  • Windows XP, Vista, 7, 8
  • Developer:
  • Google
  • Latest version:
  • Android SDK 21.0.0
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