android获取view高度方法

直接用view.getheightMesure获取不到（因为还没绘制出来）

用这个

int w = View.MeasureSpec.makeMeasureSpec(0,
				View.MeasureSpec.UNSPECIFIED);
		int h = View.MeasureSpec.makeMeasureSpec(0,
				View.MeasureSpec.UNSPECIFIED);
		imageView.measure(w, h);
		int height = imageView.getMeasuredHeight();
		int width = imageView.getMeasuredWidth();
或者

ViewTreeObserver vto = imageView.getViewTreeObserver(); 
	    vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { 
	        public boolean onPreDraw() { 
	        	vto.removeOnPreDrawListener(this);
	            int height = imageView.getMeasuredHeight(); 
	            int width = imageView.getMeasuredWidth(); 
	            return true; 
	        } 
	    });