动态改变控件大小

区分父布局
rootLayout = (LinearLayout) findViewById(R.id.test_root_linearlayout); 
        LinearLayout.LayoutParams rootLinaerParams = new LinearLayout.LayoutParams( 
                100, 100); 
        ViewGroup.LayoutParams rootGroupParams = new LinearLayout.LayoutParams( 
                100, 100); 
        RelativeLayout.LayoutParams rootRelativeParams = new RelativeLayout.LayoutParams( 
                100, 100); 
        TextView testView = new TextView(this); 
        testView.setText("根布局测试动态添加组件并设置其大小"); 
        testView.setLayoutParams(rootGroupParams); 
        rootLayout.addView(testView);