如何从数据库中完全删除密钥

Question

我想从 geoFire 中完全移除一辆车，但是当我运行这样做时：

@Override 
    public void onKeyExited(String key) { 
        // Remove any old marker 
        Marker marker = this.markers.get(key); 
        if (marker != null) { 
            marker.remove(); 
            this.markers.remove(key); 
        } 
    }

它已从当前视图中删除，但当我刷新位置时，车辆就在那里。

Answer 1

您当前的代码只是从应用程序中删除标记，不会从数据库中删除任何数据。要删除车辆，您需要执行与添加车辆时相反的操作。

来自GeoFire for Java documentation on setting location data：

To set a location for a key simply call the setLocation() method. The method is passed a key as a string and the location as a GeoLocation object containing the location's latitude and longitude:

geoFire.setLocation("firebase-hq", new GeoLocation(37.7853889, -122.4056973));

To remove a location and delete it from the database simply pass the location's key to removeLocation:

geoFire.removeLocation("firebase-hq");

如何从数据库中完全删除密钥

How do I remove a key completely from Database

android

firebase

geofire