Android Studio，如果接近位置，会收到日期通知

Question

嗨如果应用的用户接近特定事件，则必须在某个date中获得notification。

我在想使用推notification但我必须知道如何在我的应用程序中实现。

你有一些代码示例来显示我吗？谢谢

我已经阅读关于GCM从谷歌更容易发送通知？它是如何工作的？

Answer 1

这里是关于位置通知小演示..

public class AreWeThereIntentService extends IntentService { 
    private final String TAG = AreWeThereIntentService.class.getName(); 
    private SharedPreferences prefs; 
    private Gson gson; 

    public AreWeThereIntentService() { 
     super("AreWeThereIntentService"); 
    } 

    @Override 
    protected void onHandleIntent(Intent intent) { 
     prefs = getApplicationContext().getSharedPreferences(
       Constants.SharedPrefs.Geofences, Context.MODE_PRIVATE); 
     gson = new Gson(); 
     // 1. Get the event 
     GeofencingEvent event = GeofencingEvent.fromIntent(intent); 
     if (event != null) { 
      if (event.hasError()) { 
       onError(event.getErrorCode()); 
      } else { 
       // 2. Get the transition type 
       int transition = event.getGeofenceTransition(); 
       if (transition == Geofence.GEOFENCE_TRANSITION_ENTER || 
         transition == Geofence.GEOFENCE_TRANSITION_DWELL || 
         transition == Geofence.GEOFENCE_TRANSITION_EXIT) { 
        List<String> geofenceIds = new ArrayList<>(); 
        // 3. Accumulate a list of event geofences 
        for (Geofence geofence : event.getTriggeringGeofences()) { 
         geofenceIds.add(geofence.getRequestId()); 
        } 
        if (transition == Geofence.GEOFENCE_TRANSITION_ENTER || 
          transition == Geofence.GEOFENCE_TRANSITION_DWELL) { 
         // 4. Pass the geofence list to the notification method 
         onEnteredGeofences(geofenceIds); 
        } 
       } 
      } 
     } 
    } 

    private void onEnteredGeofences(List<String> geofenceIds) { 
     // 1. Outer loop over all geofenceIds 
     for (String geofenceId : geofenceIds) { 
      String geofenceName = ""; 
      // 2, Loop over all geofence keys in prefs and retrieve NamedGeofence from SharedPreferences 
      Map<String, ?> keys = prefs.getAll(); 
      for (Map.Entry<String, ?> entry : keys.entrySet()) { 
       String jsonString = prefs.getString(entry.getKey(), null); 
       NamedGeofence namedGeofence = gson.fromJson(jsonString, NamedGeofence.class); 
       if (namedGeofence.id.equals(geofenceId)) { 
        geofenceName = namedGeofence.name; 
        break; 
       } 
      } 
      // 3. Set the notification text and send the notification 
      String contextText = 
        String.format(this.getResources().getString(R.string.Notification_Text), geofenceName); 
      // 1. Create a NotificationManager 
      NotificationManager notificationManager = 
        (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE); 

      Intent intent = new Intent(this, MapsActivity.class); 
      intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP); 
      PendingIntent pendingNotificationIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT); 
      AppSettings settings = AppSettings.getSettings(getApplication()); 
      Notification notification = new NotificationCompat.Builder(this) 
        .setSmallIcon(R.mipmap.ic_launcher) 
        .setContentTitle(this.getResources().getString(R.string.Notification_Title)) 
        .setContentText(contextText) 
        .setContentIntent(pendingNotificationIntent) 
        .setStyle(new NotificationCompat.BigTextStyle().bigText(contextText)) 
        .setPriority(NotificationCompat.PRIORITY_HIGH) 
        .setAutoCancel(true) 
        .setVibrate(new long[0]) 
        .setWhen(System.currentTimeMillis()) 
        .build(); 

      try { 
       Uri song = Uri.parse(settings.getSdcard()); 
       if (song == null) { 
        notification.sound = Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE 
          + "://" + getPackageName() + "/raw/battlefield"); 
       } else { 
        notification.sound = Uri.parse(settings.getSdcard()); 
       } 
      } catch (NullPointerException e) { 
       e.printStackTrace(); 
      } 
      notificationManager.notify(0, notification); 
     } 
    } 

    private void onError(int i) { 
     Log.e(TAG, "Geofencing Error: " + i); 
    } 
} 

，或者您可以使用此示例应用程序代码：link