RecyclerView Adapter Template (Java)

recyclerview_adapter.java

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.Nullable;
import androidx.recyclerview.widget.DiffUtil;
import androidx.recyclerview.widget.RecyclerView;

import java.util.ArrayList;
import java.util.List;

#parse("File Header.java")
public class ${Adapter_Name} extends RecyclerView.Adapter<${Adapter_Name}.ViewHolder> {

    private static final String TAG = ${Adapter_Name}.class.getSimpleName();

    private Context context;
    private List<${Model_Class}> list = new ArrayList<>();
    private OnItemClickListener onItemClickListener;
    
    public interface OnItemClickListener {
        void onItemClick(int position);
    }
    
    public void setOnClickListener(OnItemClickListener listener){
        this.onItemClickListener = listener;
    }
    
    public ${Adapter_Name}() {}

    public ${Adapter_Name}(Context context, List<${Model_Class}> list, OnItemClickListener onItemClickListener) {
        this.context = context;
        this.list = list;
        this.onItemClickListener = onItemClickListener;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.${Item_Layout_ID}, viewGroup, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        ${Model_Class} item = list.get(position);
        holder.bind(item, onItemClickListener);
    }

    @Override
    public int getItemCount() {
        return list.size();
    }
    
    public void updateList(${Model_Class} newList) {
        DiffUtil.DiffResult diffResult = DiffUtil.calculateDiff(new DiffCallback(newList, this.list));
        this.list.clear();
        this.list.addAll(newList);
        diffResult.dispatchUpdatesTo(this);
    }
    
    public static class ViewHolder extends RecyclerView.ViewHolder {
       // Todo bindings

        public ViewHolder(View itemView) {
            super(itemView);
            //ButterKnife.bind(this, itemView);

        }

        public void bind(final ${Model_Class} model, final OnItemClickListener listener) {
            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    listener.onItemClick(getLayoutPosition());

                }
            });
        }
    }
    
    public class DiffCallback extends DiffUtil.Callback {
        List<${Model_Class}> oldTodoList;
        List<${Model_Class}> newTodoList;

        public DiffCallback(List<${Model_Class}> newTodoList, List<${Model_Class}> oldTodoList) {
            this.newTodoList = newTodoList;
            this.oldTodoList = oldTodoList;
        }

        @Override
        public int getOldListSize() {
            return oldTodoList.size();
        }

        @Override
        public int getNewListSize() {
            return newTodoList.size();
        }

        @Override
        public boolean areItemsTheSame(int oldItemPosition, int newItemPosition) {
            return oldTodoList.get(oldItemPosition).equals(newTodoList.get(newItemPosition));
        }

        @Override
        public boolean areContentsTheSame(int oldItemPosition, int newItemPosition) {
            return oldTodoList.get(oldItemPosition) == newTodoList.get(newItemPosition);
        }

        @Nullable
        @Override
        public Object getChangePayload(int oldItemPosition, int newItemPosition) {
            //you can return particular field for changed item.
            return super.getChangePayload(oldItemPosition, newItemPosition);
        }
    }

}