How to set multiple layout in FirebaseRecyclerAdapter?

Question

I just make a chat application with Firebase and using RecyclerView in XML and using FirebaseRecyclerAdapter in Android, but the problem is that when I send a message through EditText, the message is sent successfully and show to the right side that I set with Layout as you can see in code below but the problem is that when I close app and restart the message go to left side:

            mFirebaseRecyclerAdapter = new FirebaseRecyclerAdapter<MessageModel, MessageViewHolder>(
                MessageModel.class,
                R.layout.layout_message_sender,
                MessageViewHolder.class,
                mFirebaserefrence_messages) {


            @Override
            public int getItemViewType(int position) {
                MessageModel model = getItem(position);
                if (model.getUserId() == mUserId) {
                    return R.layout.layout_message_sender;
                }
                else {
                    return R.layout.layout_message_recipitent;
                }
            }

            @Override
            protected void populateViewHolder(MessageViewHolder viewHolder, MessageModel model, int position) {
                viewHolder.mTextView_userMessage.setText(model.getUserMessage());
                if (model.getUserName() == null) {
                    viewHolder.mTextView_userName.setText("Anonymous");
                } else {
                    viewHolder.mTextView_userName.setText(model.getUserName());
                }
                if (model.getUserImageUrl() == null) {
                    viewHolder.mCircleImageView_userImage
                            .setImageDrawable(ContextCompat.getDrawable(ChatActivity.this,
                                    R.drawable.ic_account_circle_red_48dp));
                } else {
                    Glide.with(ChatActivity.this)
                            .load(model.getUserImageUrl())
                            .into(viewHolder.mCircleImageView_userImage);
                }
            }

        };

        mFirebaseRecyclerAdapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
            @Override
            public void onItemRangeInserted(int positionStart, int itemCount) {
                super.onItemRangeInserted(positionStart, itemCount);
                int messageCount = mFirebaseRecyclerAdapter.getItemCount();
                int lastVisiblePosition = mLinearLayoutManager.findLastCompletelyVisibleItemPosition();
                // If the recycler view is initially being loaded or the user is at the bottom of the list, scroll
                // to the bottom of the list to show the newly added message.
                if (lastVisiblePosition == -1 ||
                        (positionStart >= (messageCount - 1) && lastVisiblePosition == (positionStart - 1))) {
                    mRecyclerView.scrollToPosition(positionStart);
                }
            }
        });

        mRecyclerView.setLayoutManager(mLinearLayoutManager);
        mRecyclerView.setAdapter(mFirebaseRecyclerAdapter);

        mEditText_message = (EditText) findViewById(R.id.editText_message);
        mEditText_message.addTextChangedListener(new TextWatcher() {
                                                     @Override
                                                     public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                                                     }

                                                     @Override
                                                     public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                                                         if (charSequence.toString().trim().length() > 0) {
                                                             mImageButton.setEnabled(true);
                                                         } else {
                                                             mImageButton.setEnabled(false);
                                                         }
                                                     }

                                                     @Override
                                                     public void afterTextChanged(Editable editable) {
                                                     }
                                                 }
        );

        mImageButton = (ImageButton) findViewById(R.id.imageButton_send);

        mImageButton.setOnClickListener(this);
    }

    @Override
    public void onStart() {
        super.onStart();
        mFirebaseAuth.addAuthStateListener(mFirebaseAuthListener);
    }

    @Override
    public void onStop() {
        super.onStop();
        if (mFirebaseAuthListener != null) {
            mFirebaseAuth.removeAuthStateListener(mFirebaseAuthListener);
        }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.item_signOut:
                mFirebaseAuth.signOut();
                startActivity(new Intent(ChatActivity.this, SignInActivity.class));
                finish();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    @Override
    public void onClick(View v) {
        if (v == mImageButton) {
            MessageModel messageModel = new MessageModel(mUserId,
                    mUserImageUrl,
                    mEditText_message.getText().toString(),
                    mUsername,
                    null);
            mFirebaserefrence_messages.push().setValue(messageModel);
            mEditText_message.setText(null);
        }
    }
}

Answer 1

The FirebaseUI adapters were made for a homogenous lists with a single layout. While having heterogenous list with multiple layouts were always considered an interesting feature to add (see this original feature request), it hasn't been added so far.

There is an open feature request for specifically adding multi-layout support on the FirebaseUI library: https://github.com/firebase/FirebaseUI-Android/issues/305.

You might want to add your vote/+1 to that.

Answer 2

public Class MyAdapter extends FirebaseRecyclerAdapter<ModelClass, ViewHolderClass> {

    private static final int LAYOUT_ONE = 1;

    public MyAdapter(Class<ModelClass> modelClass,
                       int modelLayout,
                       Class<ViewHolderClass> viewHolderClass,
                       Query ref) {

        super(modelClass, modelLayout, viewHolderClass, ref);

    }
    
    @Override
    public ViewHolderClass onCreateViewHolder(ViewGroup parent, int viewType) {
    
        View view;
        
        if (viewType == LAYOUT_ONE) {

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

        } 
        
        else {

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

        }
    }
    
    @Override
    public int getItemViewType(int position) 
    
        ModelClass model = getItem(position);
        
        if (model.caseWhenYouWentToUseLayoutOne)) {
            return LAYOUT_ONE;
        }
        
        return position;
    }

}