Android delete listview row in custom array adapter

Question

I have a listview that for displaying detail data. I'm storing my data in an ArrayList of Strings. However, some of the fields may not have any data to display, but I need to keep the array length the same to match a static titles array. I can trap the empty data in my getView method in my custom base adaptor here:

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

        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.drug_detail_cell, parent, false);
        }

        // check array bounds
        if (position < getCount()) {

            // check for null items
            String item = items.get(position);
            if (item != null) {

                // get the text views
                TextView title = (TextView) convertView.findViewById(R.id.item_title);
                TextView sub = (TextView) convertView.findViewById(R.id.item_subtitle);

                title.setText(titles.get(position));
                sub.setText(item.toString());                   
            } else {
                // delete row
            }
        }

        return convertView;
    }

My problem is that while the data does not display, I still have an empty row in my listview. My question is how do I delete that row? Any help would be greatly appreciated. Thanks in advanced.

delete the data that populates your listview call notifyDatasetChanged on your adapter to refresh or update listview — Raghunandan
– Raghunandan, Commented Aug 17, 2013 at 17:05
find textViews id in if condition not out of it while you are inflating the view. — Piyush
– Piyush, Commented Aug 17, 2013 at 17:34

Umer Farooq · Accepted Answer · 2013-08-17 18:00:06Z

2

For removing a row from the CustomListAdapter:

Remove the item from the ArrayAdapter from the specified index, after that call notifyDatasetChanged . It will update your listView.

In CustomAdapterClass:

@Override
public void remove(String object) {
    super.remove(object);

         // your other code
}

In ListActivity class:

CustomAdapterClass adap = new CustomAdapterClass();

adap.remove("hello world");

adap.notifyDatasetChanged(); // this will update your listView

My code is a bare bone example to depict how to achieve your goal.

answered Aug 17, 2013 at 18:00

Umer Farooq

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Comments

hieuxit · Accepted Answer · 2013-08-17 17:46:10Z

1

I have a tip: in else clause you return a empty view

else{
    View v = new View(context);
    v.setLayoutParams(new AbsListView.LayoutParams(0, 0));
    return v;
}

But if your list have divider, the divider below the empty view will be double.

In a different: I think you should handle all null data before getView call. I mean: - In getCount(){ loop and create a new map from position and not null data
loop and count all data!=null; return count; }

use new map in getView function.

Hope this help.

answered Aug 17, 2013 at 17:46

hieuxit

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1 Comment

wyoskibum Over a year ago

Thanks for the reply. I took your suggestion to handle null data before sending it to the array adapter. Since my data set is small, I created a loop to remove null data from my list and the associated header.

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