UnsupportedOperationException due to injection of Application Context while inflating layout in adapter.

[riteshakya037]

So I was trying to set android:background="?selectableItemBackground" on the adapter item view when I ran into this issue. On further research I found out that passing application context while creating custom view results in this issue. This seriously limits injecting the adapter.

Thanks

[ljluestc]

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

    private Context context;
    private List<MyItem> items;

    public MyAdapter(Context context, List<MyItem> items) {
        this.context = context;  // Ensure you pass Activity Context here
        this.items = items;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        // Inflate view using the Activity context
        View view = LayoutInflater.from(context).inflate(R.layout.item_layout, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        // Bind data to the view holder
        MyItem item = items.get(position);
        holder.textView.setText(item.getText());
        
        // Example of setting background
        holder.itemView.setBackgroundResource(R.attr.selectableItemBackground);
    }

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

    public static class ViewHolder extends RecyclerView.ViewHolder {
        TextView textView;

        public ViewHolder(View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.textView);
        }
    }
}