Introduction to Android – First step towards Android application development

Android is a free, open-source operating system and software stack for mobile application.

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Android is a sofware stack(specially design for mobile devices), consists of Operating system, middleware and applications.

Or we can say, Android is a combination of three components:

  • A free, open-source operating system for mobile devices
  • An open-source development platform for creating mobile applications
  • Devices, particularly mobile phones, that run the Android operating system and the applications
    created for it

Following are Key concepts that builds Android.

Application framework:enabling reuse and replacement of components
SQLite: is serverless, lightweight,relational, transactional SQL database engine, designed for structured data storage.
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)
Media support: for common audio, video, and still image formts (MPEG4, H.264, MP3, AAC, AMR, JPG, PNG, GIF)
Hardware Support functions : GSM Telephony, Bluetooth, EDGE, 3G, and WiFi ,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.

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