LecturerContactAdapter.java

package com.cellasoft.univrapp.adapter;

import android.content.Context;
import android.view.View;
import com.cellasoft.univrapp.manager.ContentManager;
import com.cellasoft.univrapp.model.Lecturer;
import com.cellasoft.univrapp.utils.AsyncTask;
import com.cellasoft.univrapp.widget.ContactItemInterface;

import java.util.List;

public class LecturerContactAdapter extends ContactListAdapter {

    public LecturerContactAdapter(Context context, int resource) {
        super(context, resource);
    }

    public LecturerContactAdapter(Context context, int resource, List<ContactItemInterface> items) {
        super(context, resource, items);
    }

    @Override
    protected void populateDataForRow(ViewHolder viewHolder,
                                      ContactItemInterface item, int position) {
        super.populateDataForRow(viewHolder, item, position);

        if (item instanceof Lecturer) {
            Lecturer contactItem = (Lecturer) item;

            if (viewHolder instanceof Holder) {
                Holder holder = (Holder) viewHolder;
                checked(holder, contactItem.id);
                imageLoader(holder, contactItem.thumbnail);
            }
        }

    }

    protected void checked(final Holder holder, int id) {

        new AsyncTask<Integer, Void, Boolean>() {

            @Override
            protected void onPostExecute(Boolean exist) {
                if (exist) {
                    holder.subscribed.setVisibility(View.VISIBLE);
                }
            }

            @Override
            protected Boolean doInBackground(Integer... id) {
                return id != null && id.length > 0 && ContentManager.existSubscription(id[0]);
            }
        }.execute(id);
    }

    public void refreshIndexer() {
        getIndexer().initPositions(items);
    }
}