如何在Firebase中检索唯一键的所有子节点

Question

I am creating an application which uses Firebase and Geofire. I am able to store values in FireBase.

In Geoquery I am getting the keys which are in that particular area. I want to retrieve all the child nodes of that particular key only. how do I do that?

i want to retrieve the child values of the key -KpzaWx6FfdT27FlEoaZ

how do I do that?

please give the full code for getting all the values of -KpzaWx6FfdT27FlEoaZ <---- this key only I should get

Answer 1

Assuming that user_Location is the direct child of your Firebase root, please use this code:

DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference userLocationRef = rootRef.child("user_Location").child("-KpzaWx6FfdT27FlEoaZ").child("l");
ValueEventListener eventListener = new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        Double lat = ds.child("0").getValue(Double.class);
        Double long = ds.child("0").getValue(Double.class);
        Log.d("TAG", lat + " / " + long);
    }

    @Override
    public void onCancelled(DatabaseError databaseError) {}
};
userLocationRef.addListenerForSingleValueEvent(eventListener);