View重新整理過程

這裡只討論Java<->JNI之間的重新整理，僅限CPU部分。GPU和Display部分需要看C++原始碼，暫時忽略

• View
  
  • invalidate()
  • requestFocus()
• ViewParent
  
  • invalidateChild()
• ViewGroup
  
  • invalidateChildInParent()
• ViewRootImpl
  
  • invalidate()
  • invalidateRectOnScreen()
• ViewRootImpl
  
  • scheduleTraversals()
• Choreographer
  
  • postCallback(Choreographer.CALLBACK_TRAVERSAL, mTraversalRunnable, null);
  • scheduleFrameLocked(now);
  • scheduleVsyncLocked()
• FrameDisplayEventReceiver
  
  • scheduleVsync()
  • nativeScheduleVsync(mReceiverPtr);
• android_view_DisplayEventReceiver
  
  • nativeScheduleVsync()
  • reveiver->scheduleVsync()
• DisplayEventReceiver
  
  • dispatchVsync
• Choreographer.FrameDisplayEventReceiver
  
  • onVsync
• Choreographer.FrameHandler
  
  • handleCallback
• Choreographer.FrameDisplayEventReceiver
  
  • run
• Choreographer
  
  • doFrame(System.nanoTime(), 0);