android 5.1 系統中

public long interceptKeyBeforeDispatching(WindowState win, KeyEvent event, int policyFlags) {//檢查當前是否鎖屏， 可以添加getTopApp()判斷當前activity 來屏蔽

2398 final boolean keyguardOn = keyguardOn();

添加新的方法：

//獲取當前activity 名稱

private String getTopApp() {

ActivityManager mActivityManager = (ActivityManager) mContext.getSystemService(Context.ACTIVITY_SERVICE);

List RunningTask = mActivityManager.getRunningTasks(1);

ActivityManager.RunningTaskInfo taskInfo = RunningTask.get(0);

return taskInfo.topActivity.getClassName().toString();

}

有些項目中無MENU key, 而是recent apps ， keycode 不變， 仍為82