Android开发如何动态设置控件等宽高

Android开发如何动态设置控件等宽高。

public static void setViewWidthByHeight(View view) {  
    final View mv = view;  
    final ViewTreeObserver vto = mv.getViewTreeObserver();  
    final ViewTreeObserver.OnPreDrawListener preDrawListener = new ViewTreeObserver.OnPreDrawListener() {  
        public boolean onPreDraw() {  

/               int width = mv.getMeasuredWidth();  
            int height = mv.getMeasuredHeight();  

            android.view.ViewGroup.LayoutParams lp = mv.getLayoutParams();  
            lp.width = height;  
            mv.setLayoutParams(lp);  

            final ViewTreeObserver vto1 = mv.getViewTreeObserver();  
            vto1.removeOnPreDrawListener(this);  

            return true;  
        }  
    };  
    vto.addOnPreDrawListener(preDrawListener);  
    }