去除标题栏和状态栏

  protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        // 隐藏标题栏        requestWindowFeature(Window.FEATURE_NO_TITLE);        // 隐藏状态栏        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,                WindowManager.LayoutParams.FLAG_FULLSCREEN);        //一定要在setContentView方法上面写        setContentView(R.layout.activity_main);