java中的MainActivity初始化部分设置这些操作

        //去掉标题栏supportRequestWindowFeature( Window.FEATURE_NO_TITLE);//全屏，隐藏状态getWindow().setFlags( WindowManager.LayoutParams.FLAG_FULLSCREEN ,WindowManager.LayoutParams.FLAG_FULLSCREEN);//屏幕为横屏setRequestedOrientation( ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE );