adding more items to custom ArrayAdapter

Question

I have a listview which i populate using cusome ArrayAdapter , each row in the listview contain image and title .

i followed this tutorial http://www.vogella.com/tutorials/AndroidListView/article.html to create custom arrayadapter and populate my listview using it like the following :

here i attach the adapter to my list in MainActivity:

newsAdapter = new NewsAdapter( getActivity() , titles , images );
listView.setAdapter(newsAdapter);

each of images and titles are ArrayList objects which i want to populate my listview with.

here is my ArrayAdapter :

public class NewsAdapter extends ArrayAdapter<String> {

private final Context context;
private final ArrayList<String> titles;
private final ArrayList<String> images;

public NewsAdapter(Context context,ArrayList<String> titles, ArrayList<String> images ) {
    super(context, R.layout.drawer_list_item, titles);
    this.context = context;
    this.titles = titles;
    this.images = images;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View rowView = inflater.inflate(R.layout.news_list_item, parent, false);
    TextView title = (TextView) rowView.findViewById(R.id.news_title);
    ImageView imageView = (ImageView) rowView.findViewById(R.id.news_thumble);
    title.setText(titles.get(position));
    new DownloadImageTask(imageView).execute(images.get(position));
    return rowView;
}



 }

this code works perfectly and the listView populated with the data (images and titles).

The Question:

Is it possible to append the Listview (Add more rows) in this implementation ? (e.g using newsAdapter.add() method) .

and if this is possible , how to achieve that ?

stamanuel · Accepted Answer · 2014-02-17 14:23:42Z

4

yeah, you could for example implement an addItem(String title, String image) method in your custom adapter. this method then adds the passed values to your titles and images list.

after changing the content of the listadapter you have to invalidate the view by calling notifyDataSetChanged() in that adapter to redraw the listview.

call this method then in your main activity to add more items to the list. (eg newsAdapter.addItem("some Title", imageString);

answered Feb 17, 2014 at 14:23

stamanuel

3,8691 gold badge32 silver badges46 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Kinimod Over a year ago

I followed your instruction but it does not work. Did google change it in a newer version?

stamanuel Over a year ago

afaik this method is still valid and a good way for list views. but nowadays the recyclerview is - depending on the specific needs - in some cases a good replacement for listviews.

Collectives™ on Stack Overflow

adding more items to custom ArrayAdapter

1 Answer 1

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related