Android Code Palace

Android Architecture :

• It is proven by driver model. All type of driver packages it contains.
• It Provides :

1. Memory management
2. Process Management
3. Networking
4. Security Model
5. A lot of core operating system infrastructure that are robust.

Android Architecture Figure :

Libraries :

• This section is known as sea level so it is look like in green color and these libraries is written in C and C++ programming languages.
• Now some explanation about these libraries :

1. Surface Manager :  It is responsible for drawing screens or surfaces on your mobile.
2. OpenGL/ES :  It is 3D graphics library which is used to create 3D graphics for application.
3. SGL : It is known as "Scalable Graphics Library".  SGL is the low-level graphics library implemented in 
   native code that handles rendering. It is used to create 2D graphics for our application.
4. Media Framework :  It is used for playing audio and video codecs on your mobile such as .3gp, .avi, .mp3, .mp4, .mkv, .aac etc.
5. FreeType :  It is used for rendering fonts for application in mobile.
6. SQLite :  It is used for storing data in database. And performing all database operation.
7. WebKit :  It is used for browsing internet with your browser on mobile.

Android Runtime :

• Core Libraries is written in java and it uses mostly utilities and io(input/output) packages of java programming languages.
• Dalvik Virtual Machine  is a register-based virtual machine. It is optimized for low memory requirements, and is designed to allow multiple virtual muchine run at once.

Application Framework :

•  It is also written in java programming language.
•  Now some explanation about it's componant :

1. Activity Manager : It manages the life cycle of the application and maintains backstack for the application.
2. Package Manager : It keeps installed application packages(.apk file) on your device.
3. Window Manager :  It manages our windows.
4. Telephony Manager :  It contains all API(Application Program Interface) of phone application.
5. Content Provider : It alerts shared data with another application such as our contacts are available for other applications, so other application can access contacts.
6. Resource Manager : It is used to store localized string, bitmap images, layout file description and all of the external part of application.
7. View System : It contains all building blo9cks of user interface and handles layout and drawings.
8. Notification Manager & Location Manager :  This alerts developer to create innovating and exciting application.

    And finally mobile user uses interfaces such as home , phone , browser , contact etc. on his/her device. That's why these are placed in Application category which is on top in android architecture figure.