Retrieve Node ID from FireBase Database on CardView Click

Question

I have a firebase database I am using with Android.

To Retrieve and show data from Firebase, I am using FirebaseRecyclerAdapter and results are displayed to CardView.

Now I am getting all listings from my required table to CardView. Every Node has an automatically generated value as shown in the image below.

How do I retrieve this value in Android when I click on respective CardView. I'll need this value for further database operations.

Now, I tried some of the methods posted here as well as online forums but nothing seems to work. I am not asking for complete code, just how to do it? Some reference code would be great.

Regards

I found this article here which seems promising but what is PostKey in that answer ? https://stackoverflow.com/questions/52139193/retrieving-data-from-particular-nodes-firebase-database — Mahadev, May 16 '19 at 15:31
Nope. Just First blue strikethrough line from an image. I want to use ID above that. One that showed by arrow. Starting with Lez........Zp — Mahadev, May 16 '19 at 15:38

score 2 · Accepted Answer · answered May 16 '19 at 16:59

To get the node id try the following:

DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
Query query = rootRef.child("Projects");
ValueEventListener valueEventListener = new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        for(DataSnapshot ds : dataSnapshot.getChildren()) {
             String key = ds.getKey();
        }
    }

    @Override
    public void onCancelled(@NonNull DatabaseError databaseError) {
        Log.d(TAG, databaseError.getMessage());
    }
};
query.addListenerForSingleValueEvent(valueEventListener);

First, add a reference to node Projects then loop inside of it and retrieve the id using getKey().

Yeah, Thanks. That worked. Now I only have to modify a query for sorting results. That I'll do. — Mahadev, May 19 '19 at 16:45

Retrieve Node ID from FireBase Database on CardView Click

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