android RelativeLayout 动态设置高度

定义：

    private RelativeLayout mrlay;

调高度：

  mrlay = (RelativeLayout) findViewById(R.id.rlay_1);
  android.view.ViewGroup.LayoutParams pp =mrlay.getLayoutParams();
  //mrlayt.getLayoutParams();
  pp.height =180; 
  mrlay.setLayoutParams(pp);