我已经在firebase中使用geofire插入了位置 [英] I have inserted location using geofire in firebase

问题描述

我已经在firebase中使用geofire插入位置，现在我想用标记检索单个Google地图活动中的所有位置。
我已经创建了地图活动，但我不知道如何从firebase中检索位置。

请帮我解决这个问题。使用一些源代码。

这是我的代码发送位置firebase

  GeoFire geoFire = new 
 GeoFire（databaseReference.child（Location）。child（user.getUid（）））; 
 geoFire.setLocation（location，new 
 GeoLocation（location.getLatitude（），location.getLongitude（）），new 
 GeoFire.CompletionListener（）{
 @Override 
 public void onComplete（String key，DatabaseError error）{
 if（error！= null）{
 Toast.makeText（gpdfuel.this，有一个错误
保存位置to GeoFire：+ error，Toast.LENGTH_LONG）.show（）; 
} else {
 Toast.makeText（gpdfuel.this，保存在服务器上的位置
成功！ LENGTH_LONG）.show（）; 
 
} 
} 
}）; 
  

解决方案

您必须首先创建数据引用

  DatabaseReference ref = FirebaseDatabase.getInstance（）。getReference（/ path /）; 
  

比geofire object

  GeoFire geoFire =新GeoFire（ref）; 
  

现在可以在特定范围内检索地理位置

  GeoQuery geoQuery = geoFire.queryAtLocation（new GeoLocation（lat，long），radius）; 
 geoQuery.addGeoQueryEventListener（new GeoQueryEventListener（）{
 @Override $ b $ public void onKeyEntered（String key，GeoLocation location）{
 Log.d（Const.TAG，String.format（ Key％s在[％f，％f]，key，location.latitude，location.longitude）中输入了搜索区域）; 
} 
 
 @Override 
 public void onKeyExited（String key）{
 Log.d（Const.TAG，String.format（Key％s is no in the search area，key））; 
} 
 
 @Override 
 public void onKeyMoved（String key，GeoLocation location）{
 Log.d（Const.TAG，String.format（Key％s within search within to [％f， （））; 
} 
 
 @Override 
 public void onGeoQueryReady（）{
 Log.d（ Const.TAG，所有的初始数据已经被加载，事件已经被触发！）; 
} 
 
 @Override 
 public void onGeoQueryError（DatabaseError error）{
 Log.d（Const.TAG，这个查询有错误：+ error）; 
} 
}）; 
  

I have inserted location using geofire in firebase from one of the activity in android studio now I want to retrieve all the location in single google map activity with marker. I have created map activity, but I don't know how to retrieve the location from the firebase .

Please help I am stuck in this. With some source code.

Here is my code for sending location to firebase

GeoFire geoFire = new 
GeoFire(databaseReference.child("Location").child(user.getUid()));
          geoFire.setLocation("location", new 
GeoLocation(location.getLatitude(), location.getLongitude()), new 
GeoFire.CompletionListener() {
              @Override
              public void onComplete(String key, DatabaseError error) {
                  if (error != null) {
                      Toast.makeText(gpdfuel.this, "There was an error 
saving the location to GeoFire: " + error, Toast.LENGTH_LONG).show();
                  } else {
                      Toast.makeText(gpdfuel.this, "Location saved on server 
successfully!", Toast.LENGTH_LONG).show();

                  }
              }
          });

解决方案

you have to create a data reference first

 DatabaseReference ref = FirebaseDatabase.getInstance().getReference("/path/");

than geofire object

        GeoFire geoFire = new GeoFire(ref);

now retreive geo firelocation within particular range like this

 GeoQuery geoQuery = geoFire.queryAtLocation(new GeoLocation(lat, long), radius);
    geoQuery.addGeoQueryEventListener(new GeoQueryEventListener() {
        @Override
        public void onKeyEntered(String key, GeoLocation location) {
            Log.d(Const.TAG,String.format("Key %s entered the search area at [%f,%f]", key, location.latitude, location.longitude));
        }

        @Override
        public void onKeyExited(String key) {
            Log.d(Const.TAG,String.format("Key %s is no longer in the search area", key));
        }

        @Override
        public void onKeyMoved(String key, GeoLocation location) {
            Log.d(Const.TAG,String.format("Key %s moved within the search area to [%f,%f]", key, location.latitude, location.longitude));
        }

        @Override
        public void onGeoQueryReady() {
            Log.d(Const.TAG,"All initial data has been loaded and events have been fired!");
        }

        @Override
        public void onGeoQueryError(DatabaseError error) {
            Log.d(Const.TAG,"There was an error with this query: " + error);
        }
    });

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