Android 判断一个Service是否已经运行

public boolean isServiceWork(Context mContext, String serviceName) {

boolean isWork = false;

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

List<RunningServiceInfo> myList = (List<RunningServiceInfo>)myAM.getRunningServices(40);

if (myList.size() <= 0) {

return false;

}

for(int i = 0; i < myList.size(); i++) {

String mName = myList.get(i).service.getClassName().toString();

if (mName.equals(serviceName)) {

isWork = true;

break;

}

}

return isWork;

}