android判断服务是否是运行状态详解编程语言

    /**  
         * 判断服务是否处于运行状态.  
         * @param servicename  
         * @param context  
         * @return  
         */   
        public static boolean isServiceRunning(String servicename,Context context){   
            ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);   
            List<RunningServiceInfo>  infos = am.getRunningServices(100);   
            for(RunningServiceInfo info: infos){   
                if(servicename.equals(info.service.getClassName())){   
                    return true;   
                }   
            }   
            return false;   
        }