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Custom adapter shows RuntimeException - ListView


Custom adapter shows RuntimeException - ListView

By : Asmaa Elmoghazy
Date : November 14 2020, 04:48 PM
should help you out You get NPE because your theatreList is null. You don't initialize it anywhere.
code :


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Android custom adapter and ListView shows nothing

Android custom adapter and ListView shows nothing


By : user2180247
Date : March 29 2020, 07:55 AM
this will help I want to create a ListView populated by my own layout and my data. So I looked at examples and I found that I need to extend ArrayAdapter<>. So I made a CustomAdapter and did everything by following an example. , change
code :
public CustomAdapter(Context context, int resource, ArrayList<Ssoverview> ssList) {
        super(context, resource);
        this.layoutId = resource;
        this.context = context;
        this.list = ssList;
    }
public CustomAdapter(Context context, int resource, ArrayList<Ssoverview> ssList) {
        super(context, resource , ssList); <-- change this line
        this.layoutId = resource;
        this.context = context;
        this.list = ssList;
    }
alertdialog listview with custom adapter shows nothing

alertdialog listview with custom adapter shows nothing


By : Sohail Bukhari
Date : March 29 2020, 07:55 AM
To fix this issue Mike. M was correct in his comment. The arraylist was indeed empty. However I've fixed it now. Dumb oversight on my for loop.
Listview with custom adapter shows repeating grid items if adapter used from Fragment

Listview with custom adapter shows repeating grid items if adapter used from Fragment


By : Katerina
Date : March 29 2020, 07:55 AM
hop of those help? After facing this problem I decided to switch to Java Android instead of using C#. In a few weeks after learning Java (and Android development) I tried to rewrite my program and faced the same problem! This time I've tried to dynamically create TableRows with TextViews inside it, via my custom adapter for ListView.
Still got duplicated elements in first row! But solution is very easy. You should create new Views during runtime only if current view for adapter wasn't created (equals null). (Of course, if you don't create any Views dynamically, instead use from XML layout it already works fine) This solution works just fine for my Java program and it should be like this for my old C# code:
code :
public override View GetView(int position, View convertView, ViewGroup parent)
{
    View view = convertView;

    // re-use an existing view, if one is available
    // otherwise create a new one
    if (view == null)
    {
        view = context.LayoutInflater.Inflate(Resource.Layout.Grid, parent, false);
        //find GridView from Grid.axml and set columns count to 2 (only ID and Nick)
        GridLayout tableView = view.FindViewById<GridLayout>(Resource.Id.gridLayout1);
        tableView.ColumnCount = 2;

        //Creating TextView to show ID, place position is 0 - first
        TextView textCaption = new TextView(view.Context);
        textCaption.SetText(list[position].ID.ToString(), TextView.BufferType.Normal);
        tableView.AddView(textCaption, 0);

        //Creating TextView to show ID, place position is 1 - second in a row of Grid
        textCaption = new TextView(view.Context);
        textCaption.SetText(list[position].Nick, TextView.BufferType.Normal);
        tableView.AddView(textCaption, 1);
    }

    return view;
}
Android ListView with Custom Adapter shows only last item

Android ListView with Custom Adapter shows only last item


By : Addy Darmawan
Date : March 29 2020, 07:55 AM
around this issue I am using a ListView to show some data that comes from a JSON. The JSON has 3 objects. I am using a Custom Adapter for the list view. , You're inflating your list item layout incorrectly.
code :
convertView = vi.inflate(R.layout.doc_list, (ViewGroup) activity.findViewById(R.id.doc_list_row));
convertView = vi.inflate(R.layout.doc_list, parent, false);
ListView with custom adapter that shows images and texts

ListView with custom adapter that shows images and texts


By : Shany
Date : March 29 2020, 07:55 AM
Does that help You should to override the getCount method in your customAdapter in order to Android know how many itens it have to display in ListView:
code :
@Override
    public int getCount() {
        return data.size();
    }
convertView  = inflator.inflate(layoutResoruceId, parent);
convertView  = inflator.inflate(layoutResoruceId, null);
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