"how to use more than one arraylist in recyclerview holder" Code Answer's

how to use more than one arraylist in recyclerview holder

By Uptight Unicorn on Jun 01, 2020

public class ChatAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    final int VIEW_TYPE_MESSAGE = 0;
    final int VIEW_TYPE_IMAGE = 1;

    Context context;
    List<ChatWrapper> messages;
    List<ImageDataWrapper> images;

    public ChatAdapter(Context context, List<ChatWrapper> messages, List<ImageDataWrapper> images){
        this.context = context;
        this.messages = messages;
        this.images = images;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType){
        if(viewType == VIEW_TYPE_MESSAGE){
            return new MessageViewHolder(itemView);
        }

        if(viewType == VIEW_TYPE_IMAGE){
            return new ImageViewHolder(itemView);
        }

        return null;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position){
        if(viewHolder instanceof MessageViewHolder){
            ((MessageViewHolder) viewHolder).populate(messages.get(position));
        }

        if(viewHolder instanceof ImageViewHolder){
            ((ImageViewHolder) viewHolder).populate(images.get(position - messages.size()));
        }
    }

    @Override
    public int getItemCount(){
        return messages.size() + images.size();
    }

    @Override
    public int getItemViewType(int position){
        if(position < messages.size()){
            return VIEW_TYPE_MESSAGE;
        }

        if(position - messages.size() < images.size()){
            return VIEW_TYPE_IMAGE;
        }

        return -1;
    }

    public class MessageViewHolder extends RecyclerView.ViewHolder {
        TextView message;
        TextView timeStamp;
        ImageView userImage;

        public MessageViewHolder(View itemView){
            super(itemView);

            message = (TextView) itemView.findViewById(R.id.Single_Item_Chat_Message);
            timeStamp = (TextView) itemView.findViewById(R.id.Single_Item_Chat_TimeStamp);
            userImage = (ImageView) itemView.findViewById(R.id.Single_Item_Chat_ImageView);
        }

        public void populate(ChatWrapper chatWrapper){
            message.setText(chatWrapper.getMessage());
            userImage.setText(chatWrapper.getTimestamp());
        }
    }

    public class ImageViewHolder extends RecyclerView.ViewHolder {
        TextView dataTitle;
        TextView dataLink;
        TextView dataSnippet;
        ImageView image;
        ImageButton dataSendButton;

        public ImageViewHolder(View itemView){
            super(itemView);

            dataTitle = (TextView) itemView.findViewById(R.id.Image_data_Title);
            dataLink = (TextView) itemView.findViewById(R.id.Image_data_Link);
            dataSnippet = (TextView) itemView.findViewById(R.id.Image_data_Snippet);
            image = (ImageView) itemView.findViewById(R.id.Image_data_Image);
            dataSendButton = (ImageButton) itemView.findViewById(R.id.Image_data_SendButton);
        }

        public void populate(ImageDataWrapper imageDataWrapper){
            dataTitle.setText(imageDataWrapper.getPage_Title());
            dataLink.setText(imageDataWrapper.getPage_Link());
            dataSnippet.setText(imageDataWrapper.getPage_Desc());
            Picasso.with(context).load(imageDataWrapper.getPage_ImageThumb()).into(image);
        }
    }
}

Source: stackoverflow.com

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