RecyclerViewAdapter.java

package vidyalankar.myrecyclerview;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.constraint.ConstraintLayout;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.ArrayList;

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

    private static final String TAG = "MyRecyclerAdapter";
    OnNameClickListener onNameClickListener;

    private ArrayList<String> mUserNames = new ArrayList<>();
    private Context mContext;

    public MyRecyclerAdapter(Context mContext, ArrayList<String> mUserNames, OnNameClickListener onNameClickListener) {
        this.mUserNames = mUserNames;
        this.mContext = mContext;
        this.onNameClickListener = onNameClickListener;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_item, viewGroup, false);
        ViewHolder holder = new ViewHolder(view, onNameClickListener);
        return holder;
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder viewHolder, int i) {
        Log.d(TAG, "onBindViewHolder: called");

        viewHolder.tvName.setText(mUserNames.get(i));
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

        TextView tvName;
        ConstraintLayout mParentLayout;
        OnNameClickListener onNameClickListener;

        public ViewHolder(@NonNull View itemView, OnNameClickListener onNameClickListener) {
            super(itemView);
            tvName = itemView.findViewById(R.id.tvName);
            mParentLayout = itemView.findViewById(R.id.mParentLayout);
            this.onNameClickListener = onNameClickListener;

            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View v) {
            onNameClickListener.onNameClick(getAdapterPosition());
        }
    }

    public interface OnNameClickListener {
        void onNameClick(int position);
    }
}