Android UI System
2 likes1,053 views
The document discusses Android's GUI system architecture. It describes how ActivityManagerService and WindowManagerService manage applications and windows. It explains that activities start processes and draw views. SurfaceViews are used to control an application's drawing state, with surfaces being created and destroyed as windows are relaid out by WindowManagerService. Experience sharing tips are provided around AsyncTasks, broadcast receivers, file splitting, and dialog dismissal.
Android UI System
- 1. Android's GUI system and experience sharing John Lu 2012/04/13
- 2. Agenda Android GUI System architecture Review: Service and Binder How to start a application Draw the application's view SurfaceView for application's state Experience sharing
- 3. Android GUI System architecture
- 4. Android GUI System architecture
- 5. Android GUI System architecture Example
- 6. Review: Service and Binder SDK-Service and Kernel-Service Android's IPC: Binder
- 7. How to start a application ActivityManagerService to start a applictation process and start Activity. When Application start that mean a Activity start.
- 8. How to start a application Start Process
- 9. How to start a application A ActivityThread attach to ActivityManagerService. From ActivityManagerService to start Activity.
- 10. Draw the application's view SetContentView() in Activity.onCreate(). When create the surface? When to draw our application view.
- 11. Surface for application's state Surface's life is control by WindowManagerService. Application's state will relate to surface.
- 12. Draw the application's view
- 13. Surface for application's state WindowManagerService::relayoutWindow() { … Surface = win.createSurfaceLocked(); // win is WindowState that create in WidowSession.add() … }
- 14. Surface for application's state SurfaceSession
- 15. Experience sharing AsyncTask dosen't work (Unidentified reason). Dynamic Broadcast Receiver register and unregister in Activity. Surface used between in Create and Destroy. Split the file in Assets if file over 1MByte. Except the construct view object always work between in onStart and onStop.
- 16. Experience sharing onItemClick(AdapterView adapter, View v, int position, int id), id is you need. Dialog dismiss Android Developers is your best friend like Google. (e.g., Dev Guide, Resource, etc.)
- 17. Summary Android application manager is ActivityManagerService. Application GUI manager is WindowManagerService. View create need to before Activity resume. Surface running between be created and be destroyed.