Android: instantiate a class extending ArrayAdapter

Question

How can I instantiate objects of type ArrayAdapter in Android

private class LeDeviceListAdapter extends ArrayAdapter<LeScanRecord>

LeScanRecord is a class too.

check some custom listview examples. All you need to do is define right constructor and just create new object with that. — vipul mittal
– vipul mittal, Commented Mar 6, 2016 at 8:18

Adnan Amjad · Accepted Answer · 2016-03-06 08:22:16Z

1

   public class LeDeviceListAdapter extends ArrayAdapter<LeScanRecord> {

    Context context;

    public LeDeviceListAdapter(Context context, int itemResource, List<LeScanRecord> itemList ) {
        super(context, itemResource, itemList);
        this.context = context;
        this.itemResource = itemResource;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (null == convertView) {
            convertView = newView(parent);
            // your functionality here
         }   
        return 
    }

 private View newView(ViewGroup parent) {
        return LayoutInflater.from(context).inflate(itemResource, parent, false);
    }
}

answered Mar 6, 2016 at 8:22

Adnan Amjad

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Adnan Amjad Over a year ago

Thanks. Please me it an answer. If you find it helpful

Farhad · Accepted Answer · 2016-03-06 08:31:11Z

1

You can create objects of ArrayAdapter and use it as the ListView adapter :

ArrayAdapter<LeScanRecord> adapter = new ArrayAdapter<LeScanRecord>(this,
          android.R.layout.simple_list_item_1, android.R.id.text1, values);

in which, values is a list of LeScanRecord objects to display in the listview.

For more information on using ArrayAdapter, you can study Simple ListView tutorial by AndroidExample.com.

You can also create custom Adapter for list components (ListView, GridView,Spinner , ....) by extending BaseAdapter, which is easier and more straightforward.

I recommend you to study another great article by Ravi Tamada, on Android ListViews, published on AndroidHive.info.

answered Mar 6, 2016 at 8:31

Farhad

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