Android RecyclerView.Adapter

ArrayAdapter.java

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

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

    private final Object mLock = new Object();
    private final Context mContext;
    private final LayoutInflater mInflater;
    private final List<T> mObjects = new ArrayList<>();

    public ArrayAdapter(Context context) {
        mContext = context;
        mInflater = LayoutInflater.from(context);
    }

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

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

    public List<T> getItems() {
        return mObjects;
    }

    public void add(T object) {
        synchronized (mLock) {
            mObjects.add(object);
        }
        notifyDataSetChanged();
    }

    public void insert(T object, int index) {
        synchronized (mLock) {
            mObjects.add(index, object);
        }
        notifyDataSetChanged();
    }

    public void remove(T object) {
        synchronized (mLock) {
            mObjects.remove(object);
        }
        notifyDataSetChanged();
    }

    public void addAll(List<T> objects) {
        synchronized (mLock) {
            mObjects.addAll(objects);
        }
        notifyDataSetChanged();
    }

    public void setAll(List<T> objects) {
        synchronized (mLock) {
            mObjects.clear();
            mObjects.addAll(objects);
        }
        notifyDataSetChanged();
    }

    public void clear() {
        synchronized (mLock) {
            mObjects.clear();
        }
        notifyDataSetChanged();
    }

    public void sort(Comparator<? super T> comparator) {
        synchronized (mLock) {
            Collections.sort(mObjects, comparator);
        }
        notifyDataSetChanged();
    }

    public boolean isEmpty() {
        return mObjects == null || mObjects.isEmpty();
    }

    protected Context getContext() {
        return mContext;
    }

    protected LayoutInflater getInflater() {
        return mInflater;
    }
}