通过 geofire 让用户在我的半径范围内进入列表和规则

Question

到目前为止，我面临两个问题，第一个是

Using an unspecified index. Consider adding '".indexOn": "g"' at Geofire to your security and Firebase Database rules for better performance

而运行应用程序这些是我通过 firebase

制定的安全规则

{
  "rules": {
    ".read": "auth != null",
    ".write": "auth != null"
  }
}

这是我的数据库

第二个问题，我试图获取除我以外的用户数量代码，请帮助我

final Set<String> runnersNearby = new HashSet<String>();

geoFire.setLocation(uid, new GeoLocation(lat, lang));

GeoQuery geoQuery = geoFire.queryAtLocation(new GeoLocation(lat, lang), radius);
geoQuery.addGeoQueryEventListener(new GeoQueryEventListener() {
    @Override
    public void onKeyEntered(String key, GeoLocation location) {
        Toast.makeText(UserProfile.this, "Successfully Found", Toast.LENGTH_SHORT).show();
        if (key != user.getUid())
            runnersNearby.add(key);
        Log.d("Number of users", String.valueOf(runnersNearby.size()));
        Log.d("KEY", String.valueOf(key));
    }

    @Override
    public void onKeyExited(String key) {
        Toast.makeText(UserProfile.this, "left the place", Toast.LENGTH_SHORT).show();
        runnersNearby.remove(key);
    }

    @Override
    public void onKeyMoved(String key, GeoLocation location) {
        Toast.makeText(UserProfile.this, "key moved but here", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onGeoQueryReady() {
        System.out.println("All initial data has been loaded and events have been fired!");
    }

    @Override
    public void onGeoQueryError(DatabaseError error) {
        Toast.makeText(UserProfile.this, "Error Occured", Toast.LENGTH_SHORT).show();
    }
});

Answer 1

消息非常明确：

{
  "rules": {
    ".read": "auth != null",
    ".write": "auth != null",
    "Geofire": {
      ".indexOn": "g"
    }
  }
}

Answer 2

1- 将位置保存到 Firebase：geoFire.setlocation......

2- 从 firebase 查询位置：getlocationforkey.....

a- 按区域查询 geoFire.querybyregion(region) 你需要在 mapKit 中用坐标声明区域。

b- 观察事件：
1- ObserveEventType(.keyEntered....)

2- ...............(.keyExited....)

通过 geofire 让用户在我的半径范围内进入列表和规则

getting users on my radius via geofire to a list and rules

android

firebase

geofire

firebase-realtime-database