How to update a listview on scroll up?

Question

I would like my ListView to be updated with new entries on scroll up (i.e. the way Facebook do this). How can i achieve that?

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

    // Inflate the layout
    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View rowView = inflater.inflate(R.layout.list_single, parent, false);

    ImageView image = (ImageView) rowView.findViewById(R.id.picture);
    TextView firstline = (TextView) rowView.findViewById(R.id.firstline);
    TextView secondline = (TextView) rowView.findViewById(R.id.secondline);         

    // Get information about the report
    AnimalLocationLog current = objects.get(position);

    // Get all the important information
    String species = current.getSpecies();
    String sanitizedSpecies = MiscHelpers.sanitizeString(species);
    int reportId = objects.get(position).getTrackerId();

    // Construct the URL to the image
    String imageLocation = websiteUrl + sanitizedSpecies + separator + reportId + extension;

    // Display user report          
    downloader.download(imageLocation, image);          
    firstline.setText(species);
    secondline.setText("Spotted " + current.getDateTime().toString("yyyy-MM-dd H:m"));

    return rowView;
}

@Merlevede I am not. Take some time to read the question! – chuckfinley Mar 04 '14 at 19:41 — chuckfinley, Mar 04 '14 at 19:41

score 0 · Answer 1 · answered Mar 04 '14 at 19:41

0

What you can do is getting track of your current item and if the item is the first or last (depends on what you want) then you will load more data and add that data to your list adapter.

@Override
public View getView(int position, View convertView, ViewGroup parent) {
   //your code
   if(position==objects.size()){
        ArrayList<MyObject> newData = loadMoreData();
        objects.addAll(newData);
        myAdapter.notifyDataSetChanged();
   }
}

answered Mar 04 '14 at 19:41

GhostDerfel

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I don't think this is right as this clearly lacks an onScroll listener. – chuckfinley Mar 04 '14 at 19:44
1

Take a look here http://stackoverflow.com/questions/16791100/detect-scroll-up-scroll-down-in-listview maybe this post can help you – GhostDerfel Mar 04 '14 at 19:46

score 0 · Answer 2 · answered Mar 04 '14 at 19:45

0

You can achieve this by using Endless Adapter the library is here and the tutorial regarding this can be found here and here.

answered Mar 04 '14 at 19:45

NullPointerException

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Isn't that for endless scrolling? – chuckfinley Mar 04 '14 at 19:46

How to update a listview on scroll up?

2 Answers2