Android初级教程_获取Android控件的宽和高

通过以下方法可以在onCreate中获取宽高

 1     //------------------------------------------------方法一  
    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();  
    textView.append("
"+height+","+width);  
      
      
      
      
    //-----------------------------------------------方法二  
    ViewTreeObserver vto = imageView.getViewTreeObserver();  
    vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {  
        public boolean onPreDraw() {  
            int height = imageView.getMeasuredHeight();  
            int width = imageView.getMeasuredWidth();  
            textView.append("
"+height+","+width);  
            return true;  
        }  
    });  
    //-----------------------------------------------方法三     
    ViewTreeObserver vto2 = imageView.getViewTreeObserver();    
    vto2.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {  
        @Override    
        public void onGlobalLayout() {  
            imageView.getViewTreeObserver().removeGlobalOnLayoutListener(this);    
            textView.append("

"+imageView.getHeight()+","+imageView.getWidth());  
        }    
    });