检测某Activity是否在当前Task的栈顶___Android基础篇

/**
     * 检测某Activity是否在当前Task的栈顶
     * appointClassName：指定类名称
     */
    public boolean isTopActivity(String appointClassName,Context context){
      ActivityManager manager = (ActivityManager) context.getSystemService(ACTIVITY_SERVICE);
        List<ActivityManager.RunningTaskInfo> runningTaskInfos = manager.getRunningTasks(1);
        String topClassName=null;
        if(null != runningTaskInfos){
            topClassName=(runningTaskInfos.get(0).topActivity.getShortClassName()).toString();
        }
        if(StringUtils.isEmpty(topClassName)){
            return false;
        }
        LogUtils.e(topClassName+"类存在于栈顶；指定类："+appointClassName+"   返回Boolean值："+topClassName.contains(appointClassName));
        return topClassName.contains(appointClassName);
    }