//去title requestWindowFeature(Window.FEATURE_NO_TITLE); //隱藏狀態(tài)欄 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN); //隱藏?cái)M按鍵 getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);  setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);  View decorView = getWindow().getDecorView();  decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE      | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION      | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN      | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION      | View.SYSTEM_UI_FLAG_FULLSCREEN      | View.SYSTEM_UI_FLAG_IMMERSIVE);