RecyclerView.Adapter implementation for displaying a list of Book objects.

BooksAdapter

package com.msvs.bookshelf.adapters;

import android.os.Handler;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.msvs.bookshelf.R;
import com.msvs.bookshelf.events.BookSelectedEvent;
import com.msvs.bookshelf.model.entities.Book;
import com.squareup.picasso.Picasso;

import java.util.List;

import butterknife.ButterKnife;
import butterknife.InjectView;
import de.greenrobot.event.EventBus;

/**
 * An adapter for displaying a list of {@link com.msvs.bookshelf.model.entities.Book} objects.
 */
public class BooksAdapter extends RecyclerView.Adapter<BooksAdapter.ViewHolder> {
    private final int NOTIFY_DELAY = 500;
    
    private List<Book> mBooks;

    public static class ViewHolder extends RecyclerView.ViewHolder
            implements View.OnClickListener {
        @InjectView(R.id.book_list_item_title) TextView mTitle;
        @InjectView(R.id.book_list_item_authors) TextView mAuthors;
        @InjectView(R.id.book_list_item_cover) ImageView mCover;

        public ViewHolder(View view) {
            super(view);
            ButterKnife.inject(this, view);
            view.setOnClickListener(this);
        }

        @Override
        public void onClick(View view){
            EventBus.getDefault().post(new BookSelectedEvent(
                    (Long)view.getTag(R.string.tag_book_id),
                    (String)view.getTag(R.string.tag_book_title)));
        }
    }

    public BooksAdapter(List<Book> books) {
        mBooks = books;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater
                    .from(parent.getContext())
                    .inflate(R.layout.list_item_book, parent, false);

        return new ViewHolder(v);
    }

    @Override
    public void onBindViewHolder(ViewHolder viewHolder, int position) {
        Book book = mBooks.get(position);

        Picasso.with(viewHolder.mCover.getContext())
                .load(book.getCoverImagePath())
                .resize(500, 500)
                .centerInside()
                .into(viewHolder.mCover);

        viewHolder.mTitle.setText(book.getTitle());
        viewHolder.mAuthors.setText(book.getAuthorsConcat());
        viewHolder.itemView.setTag(R.string.tag_book_id, book.getId());
        viewHolder.itemView.setTag(R.string.tag_book_title, book.getTitle());
    }

    @Override
    public long getItemId(int position) {
        return mBooks.get(position).getId();
    }

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

    // region List manipulation methods

    public void addBook(final Book book, final int position) {
        // notify of the insertion with a delay, so there is a brief pause after returning
        // from the new book screen; this makes the animation more noticeable
        Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                mBooks.add(position, book);
                notifyItemInserted(position);
            }
        }, NOTIFY_DELAY);
    }

    public void removeBook(final int position) {
        mBooks.remove(position);

        // notify of the removal with a delay so there is a brief pause after returning
        // from the book details screen; this makes the animation more noticeable
        Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                notifyItemRemoved(position);
            }
        }, NOTIFY_DELAY);
    }

    // endregion
}