Android设置全屏窗口

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//去掉窗口标题
requestWindowFeature(Window.FEATURE_NO_TITLE);
//全屏显示
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,                      WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
}