private boolean getCurrentTask(Context context) {

        ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        //獲取當前所有存活task的資訊
        List<RunningTaskInfo> appProcessInfos = activityManager.getRunningTasks(Integer.MAX_VALUE);

//遍歷，若task的name與當前task的name相同，則返回true，否則，返回false
 

        for (RunningTaskInfo process : appProcessInfos) {

            if (process.baseActivity.getPackageName().equals(context.getPackageName())
                    || process.topActivity.getPackageName().equals(context.getPackageName())) {

                return true;
            }
        }
        return
 
 false;
    }