如何從公開列表中檢索觸發的地理柵欄的經度和緯度<Geofence> getTriggeringGeofences（）

Question

我是Android新手，我正在開發地理圍欄項目。

是否有可能從公共列表getTriggeringGeofences（）檢索觸發的地理柵欄的經度和緯度？

我希望在地圖上顯示觸發的位置，一旦我們收到通知提醒並且用戶點擊了通知。點擊通知後，將顯示帶有所有觸發的地理欄位的mapActivity。 要添加標記，我需要觸發位置的LatLong。我該如何實現？

Answer 1

你可以從IntentService地理圍欄事件

GeofencingEvent geofencingEvent = GeofencingEvent.fromIntent（意向）的緯度和經度;

在意圖服務是將地理圍欄被觸發，所以你會在這裏添加引腳：

public class GeofenceTransitionsIntentService extends IntentService { 

protected void onHandleIntent(Intent intent) { 
    GeofencingEvent geofencingEvent = GeofencingEvent.fromIntent(intent); 
    if (geofencingEvent.hasError()) { 
     String errorMessage = GeofenceErrorMessages.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 triggeringGeofences = geofencingEvent.getTriggeringGeofences(); 

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

Android的官方文件對實施地理圍欄一個很好的教程：

https://developer.android.com/training/location/geofencing.html

Answer 2

你可以從GeofencingEvent獲取它。

protected void onHandleIntent(Intent intent) { 
    GeofencingEvent geofencingEvent = GeofencingEvent.fromIntent(intent); 
    if (geofencingEvent.hasError()) { 
     //TODO: Error handling 

     return; 
    } 

    Location location = geofencingEvent.getTriggeringLocation(); 
    double latitude = location.getLatitude(); 
    double longitude = location.getLongitude(); 
}