思路是这样的获取所有运行服务的名字，然后和自己服务的名字比对，

public static boolean isServiceAlive(Context context, String serviceName) {        boolean flag = false;        ActivityManager am = (ActivityManager) context                .getSystemService(Activity.ACTIVITY_SERVICE);        //返回100个服务        List
     
       runningServices = am.getRunningServices(100);        for (RunningServiceInfo runningServiceInfo : runningServices) {            String allServiceName = runningServiceInfo.service.getClassName();            if(allServiceName.equals(serviceName)){                flag = true;            }        }        return flag;    }