A RecyclerView.Adapter-like Adapter that binds RealmResults to ListView

RealmAdapter.java

import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;

import io.realm.RealmObject;
import io.realm.RealmResults;

public abstract class RealmAdapter<E extends RealmObject, VH extends RealmAdapter.ViewHolder>
        extends BaseAdapter {

    public static class ViewHolder {
        public final View itemView;

        public ViewHolder(View itemView) {
            this.itemView = itemView;
            this.itemView.setTag(this);
        }
    }

    private RealmResults<E> results;

    public abstract VH onCreateViewHolder(ViewGroup parent, int viewType);

    public abstract void onBindViewHolder(VH holder, int position);

    public void onViewRecycled(VH holder) {
    }

    public void setResults(RealmResults<E> results) {
        this.results = results;
        notifyDataSetChanged();
    }

    @Override
    public int getCount() {
        return results == null ? 0 : results.size();
    }

    @Override
    public E getItem(int position) {
        return results == null ? null : results.get(position);
    }

    @Override
    public long getItemId(int position) {
        return -1;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = onCreateViewHolder(parent, getItemViewType(position)).itemView;
        } else {
            onViewRecycled(getViewHolder(convertView));
        }

        onBindViewHolder(getViewHolder(convertView), position);

        return convertView;
    }

    @SuppressWarnings("unchecked")
    private VH getViewHolder(View view) {
        return (VH) view.getTag();
    }

}

Usage

public final class ExampleAdapter extends RealmAdapter<Example, ExampleAdapter.ViewHolder> {

    public static class ViewHolder extends RealmAdapter.ViewHolder {
        public final TextView title;

        public ViewHolder(View itemView) {
            super(itemView);
            this.title = (TextView) itemView.findViewById(R.id.title);
        }
    }

    public static interface OnItemClickListener {
        public void onItemClick(Example example);
    }

    private final LayoutInflater inflater;
    private final OnItemClickListener listener;

    public ExampleAdapter(Context context, OnItemClickListener listener) {
        this.inflater = LayoutInflater.from(context);
        this.listener = listener;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return new ViewHolder(inflater.inflate(R.layout.example_item, parent, false));
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        final Example item = getItem(position);
        holder.title.setText(item.title);
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                listener.onItemClick(item);
            }
        });
    }

}

ExampleAdapter adapter = new ExampleAdapter(this, new ExampleAdapter.OnItemClickListener() {
    public void onItemClick(Example example) {
        // ...
    }
});

listView.setAdapter(adapter);

adapter.setResults(realm.where(Example.class).findAll());

sorry noob question, what is the main benefit using this Realm adapter?

Read this answer here from Pirate App for an even more sophisticated realm adapter that can add items remove items, swipe to delete, section the recyclerview http://stackoverflow.com/questions/28995380/best-practices-to-use-realm-with-a-recycler-view

thank u