Base adapter for simple item selection

BaseSimpleSelectionAdapter.java

package com.example.daniel.testapplication.ui.base;

import android.support.v7.widget.RecyclerView;

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

/**
 * Created by Daniel Leonett ([email protected]) on 20/6/2017.
 */
public abstract class BaseSimpleSelectionAdapter<Item> extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    private static final String TAG = BaseSimpleSelectionAdapter.class.getSimpleName();

    protected List<Item> mItems = new ArrayList<>();
    protected boolean[] mSelectedPositions = new boolean[0];

    public void setItems(List<Item> items) {
        mItems.clear();
        mItems.addAll(items);

        mSelectedPositions = new boolean[mItems.size()];

        notifyDataSetChanged();
    }

    public void clearItems() {
        mItems.clear();
        mSelectedPositions = new boolean[0];

        notifyDataSetChanged();
    }

    public boolean isItemSelected(int adapterPosition) {
        return adapterPosition >= 0
                && adapterPosition < mSelectedPositions.length
                && mSelectedPositions[adapterPosition];
    }

    public void selectItem(int adapterPosition) {
        selectItemAndClearOthers(adapterPosition);

        notifyDataSetChanged();
    }
    
    private void selectItemAndClearOthers(int selectedPosition) {
        for (int i = 0; i < mSelectedPositions.length; i++) {
            mSelectedPositions[i] = (i == selectedPosition);
        }
    }

    public Item getSelectedItem() {
        for (int i = 0; i < mSelectedPositions.length; i++) {
            if (mSelectedPositions[i]) {
                return mItems.get(i);
            }
        }
        return null;
    }

    public int getSelectedPosition() {
        for (int i = 0; i < mSelectedPositions.length; i++) {
            if (mSelectedPositions[i]) {
                return i;
            }
        }
        return -1;
    }

}

UsersAdapter.java

package com.example.daniel.testapplication.ui.users;

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.bumptech.glide.Glide;
import com.example.daniel.testapplication.R;
import com.example.daniel.testapplication.ui.base.BaseSimpleSelectionAdapter;

import butterknife.BindView;
import butterknife.ButterKnife;

/**
 * Created by Daniel Leonett ([email protected]) on 20/6/2017.
 */
class UsersAdapter extends BaseSimpleSelectionAdapter<User> {

    public UsersAdapter() {

    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater vi = LayoutInflater.from(parent.getContext());
        View v = vi.inflate(R.layout.item_list_user, parent, false);
        return new ViewHolderItem(v);
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        final int finalPosition = position;

        User user = mItems.get(position);
        boolean selected = isItemSelected(position);

        final ViewHolderItem viewHolderItem = (ViewHolderItem) holder;

        viewHolderItem.tvName.setText(user.getName());

        Glide.with(viewHolderItem.itemView.getContext())
                .load(user.getAvatarUrl())
                .into(viewHolderItem.ivAvatar);

        viewHolderItem.checkedIndicator.setVisibility((selected) ? View.VISIBLE : View.INVISIBLE);

        viewHolderItem.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                selectItem(finalPosition);
            }
        });
    }

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

    public static class ViewHolderItem extends RecyclerView.ViewHolder {

        @BindView(R.id.ivAvatar)
        ImageView ivAvatar;
        @BindView(R.id.tvName)
        TextView tvName;
        @BindView(R.id.checkedIndicator)
        View checkedIndicator;

        public ViewHolderItem(View view) {
            super(view);
            ButterKnife.bind(this, view);
        }

    }

}