Get Parent Name Using Child Key In Firebase Android

I am trying to get parent name '170002001' by using child key 'UID' in android studio. Please help. Thanks in advance :) String uid = user.getUid(); private void getdata(){

Solution 1:

Place this inside your onDataChange(DataSnapshot dataSnapshot) listener

Stringparent= dataSnapshot.getKey();

Since firebase will manage a list of possible parent keys for that , do this

DatabaseReference reference;
reference = FirebaseDatabase.getInstance.getReference();

reference.addListenerForSingleValueEvent(newValueEventListener() {
    @OverridepublicvoidonDataChange(DataSnapshot dataSnapshot) {
        for (DataSnapshotchildSnapshot: dataSnapshot.getChildren()) {
            String parent = childSnapshot.getKey();
            Log.i(TAG,parent);
        }
    }

note that reference here will be the node up above your "170002001" key, which is the parent of all those keys

Edit: If you want to get all UID inside each of those nodes do this

Create a POJO class to hold that user id

publicclassUserPojo {


    privateStringUID;

    publicUserPojo(StringUID) {
        this.UID = UID;
    }
    publicUserPojo() {
    }


    publicStringgetUID() {
        returnUID;
    }

    publicvoidsetUID(String UID) {
        this.UID = UID;
    }


}

then just do the same like above

   reference.addListenerForSingleValueEvent(newValueEventListener() {
        @OverridepublicvoidonDataChange(DataSnapshot dataSnapshot) {
            for (DataSnapshot childSnapshot: dataSnapshot.getChildren()) {
                Stringparent= childSnapshot.getKey();
                  UserPojouser= childSnapshot.getValue(UserPojo.class);
//get your User IDStringuser= user.getUID();
                Log.i(TAG,parent);
            }
        }