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POFilter a Listview using a spinner in android
 

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  1. POFilter a Listview using a spinner in android
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    <p>I have this Listview that contains both text and images. Each list item contains four key elements. I want to be able to filter the listview using either of the three TextViews by an option selected from the spinner. This is what I have done so far:</p> <pre><code> public class LazyVenueAdapter extends BaseAdapter implements Filterable { private Activity activity; private ArrayList&lt;HashMap&lt;String, String&gt;&gt; data; private static LayoutInflater inflater = null; public ImageLoader imageLoader; public LazyVenueAdapter(Activity a, ArrayList&lt;HashMap&lt;String, String&gt;&gt; d) { activity = a; data = d; inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE); imageLoader = new ImageLoader(activity.getApplicationContext()); } public int getCount() { return data.size(); } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } @Override public void notifyDataSetChanged() { super.notifyDataSetChanged(); } public View getView(int position, View convertView, ViewGroup parent) { View vi = convertView; if (convertView == null) vi = inflater.inflate(R.layout.venue_list_item, null); TextView title = (TextView) vi.findViewById(R.id.venueName); TextView location = (TextView) vi.findViewById(R.id.venueLocation); TextView tags = (TextView) vi.findViewById(R.id.venueTags); ImageView thumb_image = (ImageView) vi.findViewById(R.id.venueImage); HashMap&lt;String, String&gt; venue = new HashMap&lt;String, String&gt;(); venue = data.get(position); // Setting all values in listview title.setText(venue.get(VenuesFragment.KEY_TITLE)); location.setText(venue.get(VenuesFragment.KEY_LOCATION)); tags.setText(venue.get(VenuesFragment.KEY_TAGS)); imageLoader.DisplayImage(venue.get(VenuesFragment.KEY_THUMB_URL), thumb_image); return vi; } @Override public Filter getFilter() { Filter filter = new Filter() { @Override protected FilterResults performFiltering(CharSequence constraint) { FilterResults results = new FilterResults(); ArrayList&lt;HashMap&lt;String, String&gt;&gt; filteredArrayVenues = new ArrayList&lt;HashMap&lt;String, String&gt;&gt;(); data.clear(); if (constraint == null || constraint.length() == 0) { results.count = data.size(); results.values = data; } else { constraint = constraint.toString(); for (int index = 0; index &lt; data.size(); index++) { HashMap&lt;String, String&gt; dataVenues = data.get(index); if (dataVenues.get(VenuesFragment.KEY_TAGS).toString().startsWith( constraint.toString())) { filteredArrayVenues.add(dataVenues); } } results.count = filteredArrayVenues.size(); System.out.println(results.count); results.values = filteredArrayVenues; Log.e("VALUES", results.values.toString()); } return results; } @SuppressWarnings("unchecked") @Override protected void publishResults(CharSequence constraint, FilterResults results) { data = (ArrayList&lt;HashMap&lt;String, String&gt;&gt;) results.values; notifyDataSetChanged(); } }; return filter; } } </code></pre> <p>The problem that I am having is that when I select an option from the drop down list I get back an empty result set.</p>
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    1. USKarey Powell
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    1. This table or related slice is empty.
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      1. VTUpMod
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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