addContentView用法

@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);

		TextView tv = new TextView(this);
		FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(
		FrameLayout.LayoutParams.WRAP_CONTENT,
		FrameLayout.LayoutParams.WRAP_CONTENT);
		// 设置广告出现的位置(悬浮于顶部)
		params.topMargin = 0;
		params.gravity = Gravity.TOP | Gravity.CENTER_HORIZONTAL;

		tv.setText("我擦擦擦...dynamic layout");
		addContentView(tv, params);
		// setContentView(tv);
	}