消息无法使用警报服务

Question

我创建了一个警报服务，以便在预定义的设定时间内生成消息。我的课程如下。我在我的主类中调用了setAlarmNotification。我还在我的Manifest.xml中为服务添加了2行。但是警报仍然没有工作，消息也没有被解雇。请指教。

public class AlarmTask implements Runnable {
private final Calendar date;
private final AlarmManager am;
private final Context context;
private final String taskToNotify;

public AlarmTask(Context context, Calendar date, String task) {
    this.context = context;
    this.am = (AlarmManager) context
            .getSystemService(Context.ALARM_SERVICE);
    this.date = date;
    this.taskToNotify = task;
}

@Override
public void run() {
    Intent intent = new Intent(context, NotifyService.class);
    intent.putExtra(NotifyService.INTENT_NOTIFY, true);
    intent.putExtra("task", taskToNotify);
    PendingIntent pendingIntent = PendingIntent.getService(context, 0,
            intent, 0);
    am.set(AlarmManager.RTC, date.getTimeInMillis(), pendingIntent);
}
}

以下是我的NotifySerice.java类

public class NotifyService extends Service {
public class ServiceBinder extends Binder {
    NotifyService getService() {
        return NotifyService.this;
    }
}
private static final int NOTIFICATION = 123;
public static final String INTENT_NOTIFY = "com.example.tasker.INTENT_NOTIFY";
private NotificationManager mNM;
private String task;

public void onCreate() {
    Log.i("NotifyService", "onCreate()");
    mNM = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
}

public int onStartCommand(Intent intent, int flags, int startId) {
    if (intent.getBooleanExtra(INTENT_NOTIFY, false))
        task = intent.getStringExtra("task");
    showNotification();
    return START_NOT_STICKY;
}

public IBinder onBind(Intent intent) {
    return mBinder;
}

private final IBinder mBinder = new ServiceBinder();
private void showNotification() {
    CharSequence title = "Reminder!";
    int icon = R.drawable.ic_dialog_alert;
    Bitmap largeIcon = BitmapFactory.decodeResource(getResources(),
            R.drawable.ic_dialog_alert);
    CharSequence text = task;
    long time = System.currentTimeMillis();
    PendingIntent contentIntent = PendingIntent
            .getActivity(this, new Random().nextInt(), new Intent(this,
                    ViewTask.class), 0);

    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(
            this)
            .setWhen(time)
            .setContentText(text)
            .setContentTitle(title)
            .setSmallIcon(icon)
            .setAutoCancel(true)
            .setTicker(title)
            .setLargeIcon(largeIcon)
            .setDefaults(
                    Notification.DEFAULT_LIGHTS
                            | Notification.DEFAULT_VIBRATE
                            | Notification.DEFAULT_SOUND)
            .setContentIntent(contentIntent);
    Notification notification=notificationBuilder.build();
    mNM.notify(new Random().nextInt(), notification);
    stopSelf();
}
}

这是我的scheduleClient.java类：

public class ScheduleClient {
private ScheduleService mBoundService;
private Context mContext;
private boolean mIsBound;

public ScheduleClient(Context context) {
    mContext = context;
}
public void doBindService() {
    // Establish a connection with our service
    mContext.bindService(new Intent(mContext, ScheduleService.class), mConnection, Context.BIND_AUTO_CREATE);
    mIsBound = true;
}

private ServiceConnection mConnection = new ServiceConnection() {
    public void onServiceConnected(ComponentName className, IBinder service) {
        mBoundService = ((ScheduleService.ServiceBinder) service).getService();
    }

    public void onServiceDisconnected(ComponentName className) {
        mBoundService = null;
    }
};
public void setAlarmForNotification(Calendar c, String task){
    mBoundService.setAlarm(c, task);
}
public void doUnbindService() {
    if (mIsBound) {
        // Detach our existing connection.
        mContext.unbindService(mConnection);
        mIsBound = false;
    }
}
}

最后我的ScheduleService.java类：

public class ScheduleService extends Service {
public class ServiceBinder extends Binder {
    ScheduleService getService() {
        return ScheduleService.this;
    }
}
public int onStartCommand(Intent intent, int flags, int startId) {
    return START_STICKY;
}
public IBinder onBind(Intent intent) {
    return mBinder;
}
private final IBinder mBinder = new ServiceBinder();
public void setAlarm(Calendar c, String task) {
    new AlarmTask(this, c,task).run();
}
}