Data binding in adapter of recyclerView - Android

Question

I am using dataBinding in my project to populate a RecyclerView. How can I handle clicks on items?

Here is my XML layout:

I specified the onClick handler in this line:

android:onClick="@{()->clickListener.onCardClick(listItems)}"

And below is my adapter:

public class AdapterStartActivity extends RecyclerView.Adapter {
    private ListItemActivityStartBinding binding;
    private List listTitle;
    private Context context;

    public AdapterStartActivity(Context context, List listTitle) {
        this.listTitle = listTitle;
        this.context = context;
    }

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

        public ViewHolder(View v) {
            super(v);
            txtTitles = (TextView) v.findViewById(R.id.txtTitles);
        }
    }

    @Override
    public AdapterStartActivity.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.list_item_activity_start, parent, false);
        binding = DataBindingUtil.bind(view);
        ViewHolder viewHolder = new ViewHolder(view);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(ViewHolder Vholder, int position) {
        binding.setListItems(listTitle.get(position));
    }

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

    public void onCardClick(String listItems) {
        Log.i("SADASSDASDAS", listItems);
    }
}

However, the following code doesn't work:

public void onCardClick(String listItems) {
    Log.i("SADASSDASDAS", listItems);
}

user_9087148 · Answer

Here is the adapter class for data binding:

class MyBasketAdapter(
        items: List,
        private val itemClick: (view: View, position: Int, getBasketData: GetBasketData?) -> Unit)
    : RecyclerView.Adapter() {

// refresh items
var items = items
    set(value) {
        field = value
        notifyDataSetChanged()
    }

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
    return ViewHolder(
        DataBindingUtil.inflate(
            LayoutInflater.from(parent.context),
            R.layout.item_my_basket,
            parent,
            false
        )
    )
}

override fun onBindViewHolder(holder: ViewHolder, position: Int) {
    holder.bind(position)
    holder.itemView.setOnClickListener(holder)
    holder.itemView.ibDelete.setOnClickListener(holder)
}

override fun getItemCount(): Int {
    return items.count()
}

inner class ViewHolder(private val binding: ItemMyBasketBinding) :
    RecyclerView.ViewHolder(binding.root), View.OnClickListener {

    override fun onClick(v: View?) {
        v?.let {
            itemClick.invoke(it, adapterPosition, items[adapterPosition])
        }
    }

    fun bind(
        position: Int
    ) {
        binding.basketData = items[position]
        binding.executePendingBindings()
    }
}

and this is my item_my_basket.xml file

Data binding in adapter of recyclerView - Android

5 Answers