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
 2     int w = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
 3     int h = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
 4     imageView.measure(w, h);
 5     int height =imageView.getMeasuredHeight();
 6     int width =imageView.getMeasuredWidth();
 7     textView.append("\n"+height+","+width);
 8
 9
10
11
12     //-----------------------------------------------方法二
13     ViewTreeObserver vto = imageView.getViewTreeObserver();
14     vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
15         public boolean onPreDraw() {
16             int height = imageView.getMeasuredHeight();
17             int width = imageView.getMeasuredWidth();
18             textView.append("\n"+height+","+width);
19             return true;
20         }
21     });
22     //-----------------------------------------------方法三
23     ViewTreeObserver vto2 = imageView.getViewTreeObserver();
24     vto2.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
25         @Override
26         public void onGlobalLayout() {
27             imageView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
28             textView.append("\n\n"+imageView.getHeight()+","+imageView.getWidth());
29         }
30     });