ItemsAdapter.java

package com.artemzin.qualitymatters.ui.adapters;

import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.ViewGroup;

import com.artemzin.qualitymatters.R;
import com.artemzin.qualitymatters.api.entities.Item;
import com.artemzin.qualitymatters.models.QualityMattersImageLoader;

import java.util.List;

import static java.util.Collections.emptyList;
import static java.util.Collections.unmodifiableList;

public class ItemsAdapter extends RecyclerView.Adapter<ItemViewHolder> {

    @NonNull
    private final LayoutInflater layoutInflater;

    @NonNull
    private final QualityMattersImageLoader imageLoader;

    @NonNull
    private List<Item> items = emptyList();

    public ItemsAdapter(@NonNull LayoutInflater layoutInflater, @NonNull QualityMattersImageLoader imageLoader) {
        this.layoutInflater = layoutInflater;
        this.imageLoader = imageLoader;
    }

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

    public void setData(@NonNull List<Item> items) {
        this.items = unmodifiableList(items); // Prevent possible side-effects.
        notifyDataSetChanged();
    }

    @Override @NonNull
    public ItemViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        return new ItemViewHolder(layoutInflater.inflate(R.layout.list_item, parent, false), imageLoader);
    }

    @Override
    public void onBindViewHolder(@NonNull ItemViewHolder viewHolder, int position) {
        viewHolder.bind(items.get(position));
    }

}