ArrayAdapterRecycler.java

public abstract class ArrayAdapterRecycler<T, VH extends RecyclerView.ViewHolder> extends RecyclerView.Adapter<VH> {

    private List<T> items;

    protected ArrayAdapterRecycler(List<T> items) {
        this.items = items;
    }

    @Override
    public int getItemCount() {
        return items != null ? items.size() : 0;
    }

    public T getItem(int position) {
        return items.get(position);
    }

    /**
     * Adds the specified object at the end of the array.
     *
     * @param object The object to add at the end of the array.
     */
    public void add(T object) {
        items.add(object);
        notifyItemInserted(items.size() - 1);
    }

    /**
     * Adds the specified Collection at the end of the array.
     *
     * @param collection The Collection to add at the end of the array.
     */
    public void addAll(Collection<? extends T> collection) {
        items.addAll(collection);
        notifyDataSetChanged();
    }

    /**
     * Removes the specified object from the array.
     *
     * @param position The position to remove.
     */
    public void remove(int position) {
        if (position >= 0 && position < getItemCount()) {
            items.remove(position);
            notifyItemRemoved(position);
        }
    }
    /**
     * Removes the specified object from the array.
     *
     * @param object The object to remove.
     */
    public void remove(T object) {
        int index = items.indexOf(object);
        remove(index);
    }

    /**
     * Remove all elements from the list.
     */
    public void clear() {
        items.clear();
        notifyDataSetChanged();
    }
}