Recycler View item Click event

1. Define in adapter with inter face

public class programmingAdapter extends RecyclerView.Adapter<programmingAdapter.programmingViewHolder> {

    String[] data;
    iItemClickListnerRK iItemClickListnerRk;

    public programmingAdapter(String[] data, iItemClickListnerRK iItemClickListnerRk) {
        this.data = data;
        this.iItemClickListnerRk = iItemClickListnerRk;
    }

    @Override
    public programmingViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
        View view = inflater.inflate(R.layout.list_item_layout, parent, false);
        return new programmingViewHolder(view);
    }

    @Override
    public void onBindViewHolder(programmingViewHolder holder, int position) {
        String title = data[position];
        holder.txtTitle.setText(title);

        holder.itemView.setOnClickListener(view -> {
            iItemClickListnerRk.onClickItemListnerRK(title, position);//this will get current index of item in recyclerView
        });
    }

    @Override
    public int getItemCount() {
        return data.length;
    }

    public interface iItemClickListnerRK {
        void onClickItemListnerRK(String itemNameRK, int idx);
    }


    public class programmingViewHolder extends RecyclerView.ViewHolder {
        ImageView imgIcon;
        TextView txtTitle;

        public programmingViewHolder(View itemView) {
            super(itemView);
            imgIcon = itemView.findViewById(R.id.imgIcon);
            txtTitle = itemView.findViewById(R.id.txtTitle);
        }
    }


}

2. Apply in MainActivity

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        RecyclerView recyclerView=findViewById(R.id.programmingListRK);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));

        String[] lng={"Java","C Sharp","C plus plus","Dot net","PHP","Python","C Sharp","C plus plus","Dot net","PHP","Python","C Sharp","C plus plus","Dot net","PHP","Python"};

        programmingAdapter adapter =  new programmingAdapter(lng, new programmingAdapter.iItemClickListnerRK() {
            @Override
            public void onClickItemListnerRK(String itemNameRK, int idx) {
                Toast.makeText(MainActivity.this, "Clicked => P:"+idx+", item:"+itemNameRK, Toast.LENGTH_SHORT).show();
            }
        });

        recyclerView.setAdapter(adapter);

    }
}

3. xml main

<?xml version="1.0" encoding="utf-8"?>
<androidx.recyclerview.widget.RecyclerView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/programmingListRK"
    tools:context=".MainActivity">


</androidx.recyclerview.widget.RecyclerView>

4. xml list view for recycler

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="8dp">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/imgIcon"
        android:src="@mipmap/ic_launcher"
        />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/app_name"
        android:id="@+id/txtTitle"
        android:textSize="24sp"
        android:layout_gravity="center"
        android:layout_weight="1"
        android:layout_marginLeft="16dp"/>

</LinearLayout>