two arraylist in recyclerview adapter code example
Example: how to use more than one arraylist in recyclerview holder
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);
}
}
}