Implementation method of android View drawing completion monitoring

As shown below:

//view Callback on redrawing 
view.getViewTreeObserver().addOnDrawListener(new OnDrawListener() {		
	@Override
	public void onDraw() {
	// TODO Auto-generated method stub
		
	}
});

//view Callback when loading is complete 
view.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
	@Override
	public void onGlobalLayout() {
	// TODO Auto-generated method stub
			
	}
});