Android保持屏幕常亮

// 坚持Android装备屏幕灯长亮
	public static void setScreenBright(Activity activity, boolean keepScreenOn) {
		if (keepScreenOn) {
			activity.getWindow().addFlags(
					WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
		}
	}// 坚持Android装备屏幕灯长亮
	public static void setScreenB