Databases
StackOverflow2013
Postsdbo
POAndroid - cannot update listview with filtered results from edittext string
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POAndroid - cannot update listview with filtered results from edittext string
    primarykey
    data
    text
    <p>I'm experiencing some problems filtering contacts on the phone by the search string typed by the user in an edittext.</p> <p>It seems like it's filtering well, but the problem is that the filtered ListView contains the same initial contacts as the ALL CONTACTS ListView.</p> <p>For example:</p> <pre><code>ALL CONTACTS: A - B - C - D - E </code></pre> <p>I write E in the <code>EditText</code> and, using a <code>TextWatcher</code>, the filtered result is <code>A</code>.</p> <p>So it's like it's filtering well (only one result), but the listview content has not been updated!</p> <p>Some code here:</p> <p><code>getFilter()</code> and custom filter:</p> <pre><code>@Override public Filter getFilter() { if (mFilter == null) { mFilter = new CustomFilter(); } return mFilter; } private class CustomFilter extends Filter { @Override protected FilterResults performFiltering(CharSequence prefix) { FilterResults results = new FilterResults(); Log.d("PREFIX", "its ---&gt; " + prefix); prefix = prefix.toString().toLowerCase(); if(prefix != null &amp;&amp; prefix.length()&gt;0) { ArrayList&lt;Contact&gt; contatti = new ArrayList&lt;Contact&gt;(); for(int i = 0; i &lt; _app._contacts.size(); i++) { Contact current = _app._contacts.get(i); if(current.getContactName().toLowerCase(Locale.getDefault()).contains(prefix) /*|| current.getNumber().toLowerCase().contains(prefix) || current.getEmail().toLowerCase().contains(prefix) || current.getOrganization().toLowerCase().contains(prefix)*/) { contatti.add(current); Log.d("added to contatti list: ", current.getContactName()+" - "+current.getNumber()); } } results.count = contatti.size(); results.values = contatti; } else { results.count = _app._contacts.size(); results.values = _app._contacts; } return results; } @SuppressWarnings("unchecked") @Override protected void publishResults(CharSequence constraint, FilterResults results) { ArrayList&lt;Contact&gt; risultatoFiltro = new ArrayList&lt;Contact&gt;(); risultatoFiltro = (ArrayList&lt;Contact&gt;) results.values; MyAdapter filteredAdapter = new MyAdapter(_ctx,R.layout.listview,risultatoFiltro); MainActivity.lv.setAdapter(filteredAdapter); notifyDataSetChanged(); } } </code></pre> <p><strong>EDIT</strong></p> <p>Edited publishResults method:</p> <pre><code>protected void publishResults(CharSequence constraint, FilterResults results) { if (results.count == 0) notifyDataSetInvalidated(); else { ArrayList&lt;Contact&gt; risultatoFiltro = (ArrayList&lt;Contact&gt;) results.values; notifyDataSetChanged(); clear(); //Add the items back in for (Iterator&lt;Contact&gt; iterator = risultatoFiltro.iterator(); iterator.hasNext();) { Contact contactList = (Contact) iterator.next(); add(contactList); } } } </code></pre> <p>Now the filtering works well, but if I delete some characters the list doesn't update!</p> <p>Example: write 'Daniel'. If I delete all except 'D' the list remains 'Daniel'! And if I delete the 'D' the list is not the initial one, but it gives me an empty list!</p> <p>Can you help me figuring this?</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USThe Condor
    1. USThe Condor
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COhave you tried my given solution for your problem?
      singulars
      1. POAndroid - cannot update listview with filtered results from edittext string
      1. USPratik Sharma
    2. CO@PratikSharma I took a piece of code from another answer and it seems pretty similar to your in the way it works. See my edited question, can you help me with my last problem please?
      singulars
      1. POAndroid - cannot update listview with filtered results from edittext string
      1. USThe Condor
    3. COI tried your version of the publishresults method and it works well, but when I delete part of the string I have the same problem as reported in the edited question!
      singulars
      1. POAndroid - cannot update listview with filtered results from edittext string
      1. USThe Condor
 

Querying!

 
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.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload