BaseListFragment.java

import android.app.Fragment;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import java.util.List;

import rx.Observable;

public abstract class BaseListFragment<T> extends Fragment implements OnItemClickListener {

    protected ListAdapter mAdapter;

    @Override public void onResume() {
        super.onResume();
        loadData();
    }

    @Nullable @Override public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View view = inflater.inflate(getFragmentLayoutId(), container, false);
        ListView list = (ListView) view.findViewById(getListViewId());
        mAdapter = new ListAdapter(getActivity(), getListItemLayoutId());
        list.setAdapter(mAdapter);
        list.setOnItemClickListener(this);
        return view;
    }

    protected abstract Observable<List<T>> fetchDataObservable();

    protected void loadData() {
        fetchDataObservable()
                .finallyDo(this::finallyDo)
                .subscribe(list -> {
                    mAdapter.clear();
                    mAdapter.addAll(list);
                    mAdapter.notifyDataSetChanged();
                }, this::doOnError);

    }

    protected abstract void finallyDo();

    protected abstract void doOnError(Throwable e);

    protected abstract int getFragmentLayoutId();

    protected abstract int getListViewId();

    protected abstract int getListItemLayoutId();

    protected abstract void bindListItemView(View view, T item);

    public class ListAdapter extends ArrayAdapter<T> {

        private final int layoutRes;

        public ListAdapter(Context context, int resource) {
            super(context, resource);
            layoutRes = resource;
        }

        @Override public View getView(int position, View convertView, ViewGroup parent) {
            if (convertView == null) {
                convertView = View.inflate(getContext(), layoutRes, null);
            }

            final T item = getItem(position);
            bindListItemView(convertView, item);
            return convertView;
        }

    }
}