Java – Android: Inverts the RecyclerView position

Android: Inverts the RecyclerView position… here is a solution to the problem.

Android: Inverts the RecyclerView position

I’m setting up a RecyclerView that behaves like a list, I want to have a button at the bottom of the list that adds more View when clicked, I think it’s easier to have position 0 as the first one at the bottom and increase the position to the top, so I can add View when I click View in position 0.
If there is a better way to solve this problem, please share.

Here is my adapter :

public class AddEventsAdapter extends RecyclerView.Adapter<AddEventsAdapter.ViewHolder> {

public List<String> items = new ArrayList<>();

public void addItem(String name) {
        notifyItemInserted(items.size() - 1);
        items.add(name);

}

public void removeItem(int position) {
        items.remove(position);
        notifyItemRemoved(position);
        notifyItemRangeChanged(position, items.size());
    }

@Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
        View view = inflater.inflate(R.layout.add_event_item, parent, false);

return new ViewHolder(view);
    }

@Override
    public int getItemCount() {
        return items.size();
    }

@Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.setData(position);
        holder.eventName.setText(i + "");
        if(position == 0)
        {
            holder.theLayout.setBackgroundColor(Color.parseColor("#7F9099"));
            holder.eventName.setText("Add");
        }

}

static int i;
    class ViewHolder extends RecyclerView.ViewHolder{

public TextView eventName;
        public RelativeLayout theLayout;

public ViewHolder(final View itemView) {
            super(itemView);
            eventName = (TextView)itemView.findViewById(R.id.eventName);
            theLayout = (RelativeLayout)itemView.findViewById(R.id.backgroundevent);

theLayout.setId(++i);

}

public void setData(final int position) {
            theLayout.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (position == items.size() - 1) {
                        addItem("");
                    } else {
                        removeItem(position);
                    }
                }
            });
        }

}

}

You may notice some of these errors, I’ve been working on it for the last 10 hours and I’m having a logical glitch

Solution

by adding this line to LayoutManager .setReverseLayout(true);

Related Problems and Solutions