ListView OnClick with filling

Question

I'm little lost filling a ListView from a List. I can fill it with one element, but I want to get three elements from the object, so when I touch each element the app go to the link it contain. In my actual code I just can show the title

protected  void onPostExecute (Boolean result){

            List <String> title = new ArrayList<String>();
            List <String> link = new ArrayList<>();
            List <String> date = new ArrayList<>(); 
            for(int i=0;i<news.size();i++)
            {
                title.add(news.get(i).getTitle());
                link.add(news.get(i).getLink());
                date.add(news.get(i).getDate());
            }
            ArrayAdapter <String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1,title);
            result.setAdapter(adapter);
            dialog.dismiss();
        }

In the arraylist date and link, I save the correct data, but I just can use one of them. My intention is to put date below the title and when you touch each element, the browser opens with the link selected.

Thanks a lot.

EDIT: I've done the custom adapter, but it gives me an error.

 class CustomAdapter extends ArrayAdapter<whatsnew> {

            public CustomAdapter(Context context, whatsnew[] data) {
                super(context, R.layout.listitem, data);
            }

            public View getView(int position, View convertView, ViewGroup parent) {
                LayoutInflater inflater = LayoutInflater.from(getContext());
                View item = inflater.inflate(R.layout.listitem, null); //This give me a warning

                TextView lblTitle = (TextView)item.findViewById(R.id.lbltitle);
                lblTitle.setText(data[position].getTitle());

                TextView lbldate = (TextView)item.findViewById(R.id.lbldate);
                lbldate.setText(data[position].getFecha());

                return(item);

            }

        }
        CustomAdapter adaptader = new CuestomAdapter(getActivity(), data);
        result.setAdapter(adaptador);
        dialog.dismiss();

My Logcat says:

Java NullPointerException: storage == null

The solution is change "whatsnew[] data" by "List data" in the public CustomAdapter method since I have all the data in ArrayList named data.

Answer 1

Don't use a list of strings, a better solution would be using an independent class that set and get those three variables, let's name this class (for example) Data:

public class Data{
private String title;
private String link;
private String date;
//define getters and setters here
}

then use an object of type data inside your list:

List <Data> data = new ArrayList<Data>();

you also have to make a custom adapter that extends Data:

public class ImageAdapter extends ArrayAdapter<Data>{



Context context;
    int layoutResourceId;   

ArrayList<Data> data=new ArrayList<Data>();
public ImageAdapter(Context YourClass, int layoutResourceId, ArrayList<Data> data) {
    super(YourClass, layoutResourceId, data);
    this.layoutResourceId = layoutResourceId;
    this.context = YourClass;
    this.data = data;
}




@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View row = convertView;
    ImageHolder holder = null;

    if(row == null)
    {
        LayoutInflater inflater = ((Activity)context).getLayoutInflater();
        row = inflater.inflate(layoutResourceId, parent, false);

        holder = new ImageHolder();
        holder.txtTitle = (TextView)row.findViewById(R.id.txtTitle);
        holder.txtlink = (TextView)row.findViewById(R.id.txtTitle1);
        holder.txtDate = (TextView)row.findViewById(R.id.txtTitle1);
        row.setTag(holder);
    }
    else
    {
        holder = (ImageHolder)row.getTag();
    }

    Data d = data.get(position);
    holder.txtTitle.setText(d.getTitle());
    holder.txtLink.setText(d.getLink());
    holder.txtDate.setText(d.getDate());


   return row;

}

static class ImageHolder
{
    ImageView imgIcon;
    TextView txtTitle;
    TextView txtTitle1;

}


}

then you create this:

ImageAdapter adapter1 = new TicketsImageAdapter(getActivity(),
                    R.layout.photo_list_adapter, data);

and you set your listview to this adapter:

dataList.setAdapter(adapter1);

Regarding NullPointerException: -first of all you've to initialize the vars inside your customAdapter constructor -the second thing is that you have to separate between listview layout and listItems so create new xml that contains listItems->tvTitle,tvLink,tvDate -then you have to make a condition that getView doesn't return View=null as i've did in the above code hope this will work for you. best of luck