1、计算view尺寸
ViewTreeObserver vto = view.getViewTreeObserver();
vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
public boolean onPreDraw() {
int height = view.getMeasuredHeight();
int width = view.getMeasuredWidth();
return true;
}
});
原文：http://www.cnblogs.com/cll-android/p/4128997.html