AlarmManager无法启动我的服务

Question

我无法让我的闹钟管理员开始我的服务。

private PendingIntent mAlarmSender;
    mAlarmSender = PendingIntent.getService(MeetingManager.this,0, new Intent(MeetingManager.this, UpdateData.class), 0);

    long firstTime = SystemClock.elapsedRealtime();

    AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE); 
    am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, firstTime, 1*100, mAlarmSender);

我每隔5分钟就会在LogCat中看到以下内容。不确定它是否与问题有关。

12-13 11:16:17.104: DEBUG/SntpClient(58): request time failed: java.net.SocketException: Address family not supported by protocol

以下是我的UpdateData类：

package com.MeetingManager;

import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;

public class UpdateData extends Service {
    public static final String PREFS_NAME = "MyAppData";        

        private static final String TAG = "MyApp";
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate();


            Log.d(TAG, "HELLO");


        }
        @Override
        public IBinder onBind(Intent arg0) {
            // TODO Auto-generated method stub
            Log.d(TAG, "NOT HELLO ");
            return null;
        }

    }

以下是我的清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.MeetingManager"
      android:versionCode="2"
      android:versionName="2.0">
    <uses-sdk android:minSdkVersion="8" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".GetRoom"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".MeetingManager"></activity>
        <activity android:name=".XMLfunctions"></activity>
        <activity android:name=".CreateMeeting"></activity>     

        <service android:enabled="true" android:name=".UpdateData" />


    </application>

        <uses-permission android:name="android.permission.INTERNET" />
</manifest>