当应用程序被杀死或在后台运行时，GeofencingClient推送通知

Question

我需要有关新的Api GeofencingClient的帮助。我正在尝试开发基于位置的提醒，但是我在通知部分上遇到了一些问题。当应用程序被杀死或在后台运行时，我找不到任何通知用户的方法。

这些是我的代码的一部分。

地理围栏代码的一部分。

private void addReminder(ReminderDetails reminder){
    Geofence geofence=buildGeofence(reminder);
    mGeofenceList.add(geofence);
    Log.d(TAG, "addReminder: inside");
    if(geofence!=null&& ContextCompat.checkSelfPermission(
            this,
            Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED){
        mGeofencingClient.addGeofences(buildGeofencingReq(geofence),getGeofencePendingIntent()).addOnCompleteListener(this);
    }
}

private GeofencingRequest buildGeofencingReq(Geofence geofence) {
    GeofencingRequest.Builder builder = new GeofencingRequest.Builder();
    Log.d(TAG, "GeofencingRequest: inside");
    // The INITIAL_TRIGGER_ENTER flag indicates that geofencing service should trigger a
    // GEOFENCE_TRANSITION_ENTER notification when the geofence is added and if the device
    // is already inside that geofence.
    builder.setInitialTrigger(GeofencingRequest.INITIAL_TRIGGER_ENTER);

    // Add the geofences to be monitored by geofencing service.
    builder.addGeofences(mGeofenceList);

    // Return a GeofencingRequest.
    return builder.build();
}

private Geofence buildGeofence(ReminderDetails reminder) {
    double lat =reminder.latLng.latitude;
    double longitude=reminder.latLng.longitude;
    double radius=reminder.radius;
    Log.d(TAG, "buildGeofence: inside");
    return new Geofence.Builder()
            .setRequestId(reminder.id)
            .setCircularRegion(
                    lat,
                    longitude,
                    (float)radius
            )
            .setTransitionTypes(Geofence.GEOFENCE_TRANSITION_ENTER)
            .setExpirationDuration(Geofence.NEVER_EXPIRE)
            .build();


}

private PendingIntent getGeofencePendingIntent() {

    Log.d(TAG, "PendingIntent : inside");

    if (mGeofencePendingIntent != null) {
        return mGeofencePendingIntent;
    }
    Intent intent = new Intent(this, GeofenceReceiver.class);
    // We use FLAG_UPDATE_CURRENT so that we get the same pending intent back when calling
    // addGeofences() and removeGeofences().
    mGeofencePendingIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
    return mGeofencePendingIntent;
}



@Override
public void onComplete(@NonNull Task<Void> task) {
    Log.d(TAG, "onComplete: inside");
    if (task.isSuccessful()) {
        List<ReminderDetails> reminderArrayList = Utils.getAll(this);
        reminderArrayList.add(reminder);
        Utils.saveAll(this, reminderArrayList);
        Log.d(TAG, "onComplete: "+new Gson().toJson(mGeofenceList));
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel serviceChannel = new NotificationChannel(
                    "ServiceChannel",
                    "Example Service Channel",
                    NotificationManager.IMPORTANCE_DEFAULT
            );

            NotificationManager manager = getSystemService(NotificationManager.class);
            manager.createNotificationChannel(serviceChannel);
        }


        setResult(Activity.RESULT_OK);
        finish();
    } else {
        // Get the status code for the error and log it using a user-friendly message.
        String errorMessage = GeofenceError.getErrorString(this, task.getException());
        Log.w(TAG, errorMessage);
    }

}

这是我的TransitionIntentService

public class GeofenceTransitionService extends JobIntentService {

private static final int JOB_ID = 573;

private static final String TAG = "GeofenceTransitionsIS";

private static final String CHANNEL_ID = "channel_01";

private ReminderDetails reminder;
/**
 * Convenience method for enqueuing work in to this service.
 */
public static void enqueueWork(Context context, Intent intent) {
    enqueueWork(context, GeofenceTransitionService.class, JOB_ID, intent);
    Log.d(TAG, "GeofenceTransitionService : enqueueWork");
}

/**
 * Handles incoming intents.
 * @param intent sent by Location Services. This Intent is provided to Location
 *               Services (inside a PendingIntent) when addGeofences() is called.
 */
@Override
protected void onHandleWork(Intent intent) {
    Log.d(TAG, "GeofenceTransitionService : onHandleWork");
    GeofencingEvent geofencingEvent = GeofencingEvent.fromIntent(intent);
    if (geofencingEvent.hasError()) {
        String errorMessage = GeofenceError.getErrorString(this,
                geofencingEvent.getErrorCode());
        Log.e(TAG, errorMessage);
        return;
    }

    // Get the transition type.
    int geofenceTransition = geofencingEvent.getGeofenceTransition();

    // Test that the reported transition was of interest.
    if (geofenceTransition == Geofence.GEOFENCE_TRANSITION_ENTER ||
            geofenceTransition == Geofence.GEOFENCE_TRANSITION_EXIT) {

        // Get the geofences that were triggered. A single event can trigger multiple geofences.
        List<Geofence> triggeringGeofences = geofencingEvent.getTriggeringGeofences();

        // Get the transition details as a String.
        String geofenceTransitionDetails = getGeofenceTransitionDetails(geofenceTransition,
                triggeringGeofences);

        // Send notification and log the transition details.
        sendNotification(geofenceTransitionDetails);
        Log.i(TAG, geofenceTransitionDetails);
    } else {
        // Log the error.
        Log.e(TAG, getString(R.string.geofence_transition_invalid_type, geofenceTransition));
    }
}

我的接收器

public class GeofenceReceiver extends BroadcastReceiver {
private static final String TAG = "GeofenceReceiver";
/**
 * Receives incoming intents.
 *
 * @param context the application context.
 * @param intent  sent by Location Services. This Intent is provided to Location
 *                Services (inside a PendingIntent) when addGeofences() is called.
 */
@Override
public void onReceive(Context context, Intent intent) {
    // Enqueues a JobIntentService passing the context and intent as parameters
    GeofenceTransitionService.enqueueWork(context, intent);
    Log.d(TAG, "GeofenceReceiver : onReceive");
}

}

当应用被杀死或在后台运行时，我没有收到任何带有这些代码的通知。我对实现通知用户的所有想法持开放态度。

有人可以帮助我吗？