onBindViewHolder and onCreateViewholder of FirebaseRecyclerAdapter are not getting called

Question

I am trying to populate a recyclerview using FirebaseRecyclerAdapter fetching details from firebase.

Activity code is given below :-

 private FirebaseRecyclerAdapter<UserChat,RecyclerView.ViewHolder> adapter; 

final FirebaseRecyclerOptions<UserChat> options = new FirebaseRecyclerOptions.Builder<UserChat>()
                .setQuery(queryforDisplayMessages, UserChat.class)
                .setLifecycleOwner(this)
                .build();

adapter=new FirebaseUserChatAdapter(options);
    mRecyclerView.setLayoutManager(new LinearLayoutManager(getBaseContext()));
    mRecyclerView.setAdapter(adapter);

FirebaseAdapter Code is given below

public class FirebaseUserChatAdapter extends FirebaseRecyclerAdapter<UserChat,RecyclerView.ViewHolder> {
private static final String TAG=FirebaseUserChatAdapter.class.getSimpleName();

private static final int VIEW_TYPE_MESSAGE_SENT = 1;
private static final int VIEW_TYPE_MESSAGE_RECEIVED = 2;

/**
 * Initialize a {@link RecyclerView.Adapter} that listens to a Firebase query. See
 * {@link FirebaseRecyclerOptions} for configuration options.
 *
 * @param options
 */
public FirebaseUserChatAdapter(@NonNull FirebaseRecyclerOptions<UserChat> options) {
    super(options);
}

@Override
public int getItemViewType(int position) {
    UserChat message = getItem(position);

    Log.d(TAG,"usermodel"+message.getUserModel().getId());

    if (message.getUserModel().getId().equals("GgGwv7BzOSSoMA5ve2047Neg8aC3")) {
        // If the current user is the sender of the message
        return VIEW_TYPE_MESSAGE_SENT;
    } else {
        // If some other user sent the message
        return VIEW_TYPE_MESSAGE_RECEIVED;
    }
}

@Override
protected void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position, @NonNull UserChat model) {

    UserChat message = getItem(position);



    switch (holder.getItemViewType()){

        case VIEW_TYPE_MESSAGE_SENT:

            ((FirebaseUserChatViewHolderSent)holder).tvSent.setText(model.getMessage());

        case VIEW_TYPE_MESSAGE_RECEIVED:

            ((FirebaseUserChatViewHolderReceived)holder).tvReceived.setText(model.getMessage());
    }

}

@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View view;

    switch (viewType){

        case VIEW_TYPE_MESSAGE_SENT:

            view = LayoutInflater.from(parent.getContext())
                    .inflate(R.layout.chat_user1_item, parent, false);
            return new FirebaseUserChatViewHolderSent(view);

        case VIEW_TYPE_MESSAGE_RECEIVED:
            view = LayoutInflater.from(parent.getContext())
                    .inflate(R.layout.chat_user2_item, parent, false);
            return new FirebaseUserChatViewHolderReceived(view);
    }

    return null;
}

class FirebaseUserChatViewHolderSent extends RecyclerView.ViewHolder {

    TextView tvSent;

    public FirebaseUserChatViewHolderSent(View itemView) {
        super(itemView);
        tvSent=itemView.findViewById(R.id.textview_messagesent);
    }
}

class FirebaseUserChatViewHolderReceived extends RecyclerView.ViewHolder {

    TextView tvReceived;

    public FirebaseUserChatViewHolderReceived(View itemView) {
        super(itemView);
        tvReceived=itemView.findViewById(R.id.textview_messagereceived);
    }
}
}

Model class

    package com.iworld.daxi.Model;


    import java.security.Timestamp;

    /**
     * Created by Admin on 20/02/2018.

 */

public class UserChat {


    private boolean datetimestamp;
    private String message;
    private String status;
    private Object timeStamp;
    private UserModel userModel;

    public UserChat(){

    }

    public UserChat(boolean datetimestamp, String message, String status, Object timeStamp, UserModel userModel) {
        this.datetimestamp = datetimestamp;
        this.message = message;
        this.status = status;
        this.timeStamp = timeStamp;
        this.userModel = userModel;
    }

    public boolean isDatetimestamp() {
        return datetimestamp;
    }

    public void setDatetimestamp(boolean datetimestamp) {
        this.datetimestamp = datetimestamp;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public String getStatus() {
        return status;
    }

    public void setStatus(String status) {
        this.status = status;
    }

    public Object getTimeStamp() {
        return timeStamp;
    }

    public void setTimeStamp(Object timeStamp) {
        this.timeStamp = timeStamp;
    }

    public UserModel getUserModel() {
        return userModel;
    }

    public void setUserModel(UserModel userModel) {
        this.userModel = userModel;
    }
}

Its going to the FirebaseUserChatAdapter constructor. But no other methods are getting called. And so my recyclerview is not getting populated. Can someone help please.

can you post your pojo class please , and a photo of your database structure in firebase — Gastón Saillén, Mar 13 '18 at 12:25
Override this method and return number of items "getItemCount()". — RajaReddy PolamReddy, Mar 13 '18 at 12:28
@GastonSaillen Pojo class added. It was working fine when I used ListView Adapter . But i want to use RecyclerAdaper since there are different layouts. But those methods are not getting called. — neab, Mar 13 '18 at 12:34
your pojo need to match exactly your database items, can you post a photo of your firebase database ? just the name of the fields — Gastón Saillén, Mar 13 '18 at 12:35
it exactly matches the database items . Beacuse it was working fine when i used FirebaseListAdapter @GastonSaillen — neab, Mar 13 '18 at 12:39

score 3 · Answer 1 · answered Mar 13 '18 at 12:45

you just need to startListening in your onStart() method

 protected void onStart() {
         super.onStart();

        mAdapter.startListening();
     }

and in your onStop()

 protected void onStop() {
         super.onStop();

        mAdapter.stopListening();
     }

Also make sure your variables in the pojo match exactly with the fields in your datbase structure in Firebase.

Take a look at the doc

https://github.com/firebase/FirebaseUI-Android/tree/master/firestore/#firestorerecycleradapter-lifecycle

hope it helps

Happy coding

I think the doc url should be : https://github.com/firebase/FirebaseUI-Android/blob/master/database/README.md#firebaserecycleradapter-lifecycle — Anatol Bivol, Apr 18 '21 at 17:00

score 2 · Accepted Answer · answered Mar 13 '18 at 12:40

2

Before this:

   mRecyclerView.setAdapter(adapter);

add this:

   adapter.startListening();

hopefully it will work.

answered Mar 13 '18 at 12:40

Hasan Bou Taam

4,017
2
12
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This is not working for me... – Kavin Raju S Feb 29 '20 at 10:01

onBindViewHolder and onCreateViewholder of FirebaseRecyclerAdapter are not getting called

2 Answers2

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