Android Boot接收器无法触发

Question

我在清单中设置了启动接收器，启动WakefulBroadcastReceiver然后启动ServiceIntent来创建警报。

我的清单有这个：

<receiver android:name=".controllers.receivers.AlarmBootReceiver" android:enabled="true">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED"/>
    </intent-filter>
</receiver>

以及RECEIVE_BOOT_COMPLETED权限：

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

我的AlarmBootReceiver是这样的：

public class AlarmBootReceiver extends WakefulBroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Intent alarmBootServiceIntent = new Intent(context, AlarmBootService.class);
        startWakefulService(context, alarmBootServiceIntent);
    }
}

我的IntentService是这样的：

public class AlarmBootService extends IntentService {
    public AlarmBootService() {
        super("AlarmBootService");
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        Log.wtf("Boot", "Boot receiver started");
        //Get list of classes from realm and set up alarms for each
        Realm.init(getBaseContext());
        Realm realm = Realm.getDefaultInstance();
        RealmResults<Class> classes = realm.where(Class.class).findAll();
        //For each day in days string, create an alarm an hour before fromtime
        MainActivity ma = new MainActivity();
        for (Class c : classes) {
            for (char day : c.getDays().toCharArray()) {
                //Convert SMTWRFA char to calendar day int
                int d = ClassDialog.charToDay(day);
                //Create the alarm
                ma.createWeeklyAlarmForDay(d, c.getName(),
                c.getBuilding(),
                c.getFromAMPM().equals("AM") ? Calendar.AM : Calendar.PM,
                c.getTimeFromH(), c.getTimeFromM());
            }
        }
        //Release wakelock
        AlarmBootReceiver.completeWakefulIntent(intent);
    }
}

但该服务似乎永远不会推出。我从未在输出中看到“Boot receiver started”登录，并且未注册警报。我做错了什么？