在Fragment中使用AlarmManager和BroadcastReceiver设置重复报警时遇到真实的问题。在Activity中使用以下代码时没有问题。当移动到Fragment时，BroadcastReceiver从不调用onReceive。
片段：

public void startAlarm(View view) {

    Log.i(TAG, "startAlarm");

    mAlarmMgr     = (AlarmManager) getActivity().getSystemService(Context.ALARM_SERVICE);
    Intent intent = new Intent(getActivity(), AlarmReceiver.class);
    mAlarmIntent  = PendingIntent.getBroadcast(getActivity(), 0, intent, 0);

    mAlarmMgr.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
                           SystemClock.elapsedRealtime(),
                           60 * 1000,
                           mAlarmIntent);
}

public void cancelAlarm(View view) {

    Log.i(TAG, "cancelAlarm");

    // If the alarm has been set, cancel it.
    if (mAlarmMgr!= null) {
        mAlarmMgr.cancel(mAlarmIntent);
    }
}

报警：

public class AlarmReceiver extends BroadcastReceiver {

private static final String TAG = AlarmReceiver.class.getName();

@Override
public void onReceive(Context context, Intent intent) {

    Log.i(TAG, "onReceive");

    // For our recurring task, we'll just display a message
    Toast.makeText(context, "I'm running", Toast.LENGTH_SHORT).show();
}}

清单：

<receiver android:name=".alarms.AlarmReceiver">
    </receiver>

我只是好奇，我到底哪里做错了？我在想，也许我没有在清单中正确地登记记忆传承人。
谢谢