android 屏蔽按键

UiModeManager uiModeManager = (UiModeManager )getSystemService(Context.UI_MODE_SERVICE);
		
		if(uiModeManager.getCurrentModeType()==UiModeManager.DISABLE_CAR_MODE_GO_HOME){
			uiModeManager.enableCarMode(UiModeManager.ENABLE_CAR_MODE_GO_CAR_HOME);
			flag = true;
			return;
		}