Custom adapterView calls getView function multiple times and updating list view which causes slow speed of application

Question

I have an custom adpter which is having public View getView(int position, View convertView, ViewGroup parent) method.

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    ObjA obj = mArr.get(position);
    LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View view;

    if (convertView == null) {
        view = new View(mContext);
        view = inflater.inflate(R.layout.grid_view, null);

    } else {
        view = (View) convertView;
    }

    // set value into bus_stop_name textView
                TextView id_label = (TextView) view.findViewById(R.id.txt_ID);
                TextView direction_label = (TextView) view.findViewById(R.id.txt_Direction);

                id_label.setText(obj.getId()); // Setting values in view
                direction_label.setText(obj.getName());

                GetTiming getTiming = new GetTiming(mContext, this, obj.getId(), view);
                getTiming.execute();

    return view;
}

This GetTiming is AsyncTask which fetches time from Parse.com. I have interface which will call public void onGetTimings(ArrayList<Timing> timings, View view) method.

@Override
public void onGetTimings(ArrayList<Timing> timings, View view) {

    TextView time = (TextView) view.findViewById(R.id.txt_time);
    busRouteTime.setText("" + timings.get(0).getTime() + "");
}

This method is getting call multiple times. Means multiple networking calls. I have other functionality which also uses Parse.com. Due to calling this method again and again, application get slow. Could anyone suggest other option to update textView in listItemView?

Answer 1

Can you design the app to fetch the data from parse using a single api call instead of each call for each row element? (a single api call to fetch all the data from parse OR fetch first x rows data at a time).

Then create some model to store the fetched data along with the response from parse. After this iterate through the adapter.