android之地理围栏转换后，我如何在主要 Activity 上做些什么

当有人进入我的地理围栏之一时，我想在我的 map 上显示一个布局并开始播放一些音频。 我一直在学习一些教程，我知道如何在它们进入时进行推送通知，但这一切都发生在另一个 IntentService 类中。

也许这就是 onResult 的用途？我不确定如何从结果参数中获取地理围栏信息

LocationServices.GeofencingApi.addGeofences( 
            gApiClient, 
            getGeofencingRequest(), 
            getGeofencePendingIntent() 
    ).setResultCallback(this); 
 
 @Override 
public void onResult(Result result) { 
 
 
} 

这是我的 intentService 类

public class GeofenceTransitionsIntentService extends IntentService { 
private final String TAG = "Geofence_transitions"; 
 
 
public GeofenceTransitionsIntentService() { 
    super("geo-service"); 
} 
 
 
@Override 
protected void onHandleIntent(Intent intent) { 
    GeofencingEvent geofencingEvent = GeofencingEvent.fromIntent(intent); 
    if (geofencingEvent.hasError()) { 
        String errorMessage = 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_DWELL || 
            geofenceTransition == Geofence.GEOFENCE_TRANSITION_EXIT) { 
 
        // Get the geofences that were triggered. A single event can trigger 
        // multiple geofences. 
        ArrayList<Geofence> triggeringGeofences = (ArrayList<Geofence>) geofencingEvent.getTriggeringGeofences(); 
 
        // Get the transition details as a String. 
        String geofenceTransitionDetails = getGeofenceTransitionDetails( 
                this, 
                geofenceTransition, 
                triggeringGeofences 
        ); 
 
        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this) 
                        .setSmallIcon(R.drawable.ic_media_play) 
                        .setContentTitle("Geofence!") 
                        .setContentText(geofenceTransitionDetails); 
 
        mBuilder.setStyle(new NotificationCompat.BigTextStyle(mBuilder).bigText(geofenceTransitionDetails).setBigContentTitle("Big title") 
                .setSummaryText(geofenceTransitionDetails)); 
 
 
        // Send notification and log the transition details. 
        int mNotificationId = 001; 
 
        NotificationManager mNotifyMgr = 
                (NotificationManager)    getSystemService(NOTIFICATION_SERVICE); 
 
        mNotifyMgr.notify(mNotificationId, mBuilder.build()); 
 
    } else { 
        // Log the error. 
        Log.e(TAG, getString(R.string.geofence_transition_invalid_type, 
                geofenceTransition)); 
 
    } 
 
} 

人们通常如何获取触发地理围栏的信息并在主线程上执行某些操作？

请您参考如下方法:

使用LocalBroadcastManager向任何必须收听事件的上下文发送广播。以下是您应该在 Activity 中执行的操作的示例:

public class MyActivity extends Activity { 
 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceBundle); 
        //Your code here 
 
        LocalBroadcastManager lbc = LocalBroadcastManager.getInstance(this); 
        GoogleReceiver googleReceiver = new GoogleReceiver(this); 
        lbc.registerReceiver(googleReceiver, new IntentFilter("googlegeofence")); 
        //Anything with this intent will be sent to this receiver 
     
    } 
 
    static class GoogleReceiver extends BroadcastReceiver{ 
 
        MyActivity mActivity; 
 
        public GoogleReceiver(Activity activity){ 
            mActivity = (MyActivity)activity; 
        } 
 
        @Override 
        public void onReceive(Context context, Intent intent) { 
            //Handle the intent here 
        } 
    } 
} 

这是您应该为您的 intentservice 写下的内容:

public class GeofenceTransitionsIntentService extends IntentService { 
 
//Any stuff you need to do here     
 
@Override 
protected void onHandleIntent(Intent intent) { 
    GeofencingEvent geofencingEvent = GeofencingEvent.fromIntent(intent); 
 
    //Collect all the stuff you want to send to activity here 
 
 
    Intent lbcIntent = new Intent("googlegeofence"); //Send to any reciever listening for this 
 
    lbcIntent.putExtra("Key", Value);  //Put whatever it is you want the activity to handle 
 
    LocalBroadcastManager.getInstance(this).sendBroadcast(lbcIntent);  //Send the intent 
}