FirebaseUI with RecycleView

Question

After uptade syntax of FirebaseUI, can\'t work without onPopulateViewHolder method. I read the doc of FirebaseUI and did the same. After running app, Recy

Answer 1

To solve this, please follow the next steps:

1. change your model to look like this:

   public class Places {
       private String image, name;
   
       public Places() { }
   
       public Places(String image, String name) {
           this.image = image;
           this.name = name;
       }
   
       public String getImage() { return image; }
       public String getName() { return name; }
   }
   

   The fields from your model class should look exactly like the one from your database. In your code are different. See name_place vs. name.

2. Make your firebaseRecyclerAdapter varaible global:

   private FirebaseRecyclerAdapter<Places, PlaceViewHolder> firebaseRecyclerAdapter;
   

3. Remove FirebaseRecyclerAdapter<Places, PlaceViewHolder> from the onCreate() method.

4. Add the following lines of code in the onStart() and onStop() methods.

   @Override
   protected void onStart() {
       super.onStart();
       firebaseRecyclerAdapter.startListening();
   }
   
   @Override
   protected void onStop() {
       super.onStop();
       if(firebaseRecyclerAdapter != null) {
           firebaseRecyclerAdapter.stopListening();
       }
   }
   

This is a complete example on how you can retrieve data from a Firebase Realtime database and display it in a RecyclerView using FirebaseRecyclerAdapter.

Edit:

To simply display those names in the logcat, please use the following code:

DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference usersRef = rootRef.child("Users");
ValueEventListener valueEventListener = new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        for(DataSnapshot ds : dataSnapshot.getChildren()) {
            String name = ds.child("name").getValue(String.class);
            Log.d("TAG", name);
            Toast.makeText(getApplicationContext(), name, Toast.LENGTH_SHORT).show());
        }
    }

    @Override
    public void onCancelled(DatabaseError databaseError) {}
};
usersRef.addListenerForSingleValueEvent(valueEventListener);