Question

While working on my first app I’d like to give the user the ability to search the entries in a ListView (it’s in the UI-Thread).
For that, I added the SearchView into the Action Bar.

listView1.setTextFilterEnabled(true);

In an AsyncTask I set the Adapter to the listView:

protected void onPostExecute(boolean result) {
ListAdapter listadapter= new ArrayAdapter<String>(getApplicationContext(), R.layout.list_item, nameList);
listview1.setAdapter(listadapter);
}

Now the SearchView:

public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.activity_main, menu);    
    SearchView searchView = (SearchView) menu.findItem(R.id.menu_search).getActionView();
searchView.setOnQueryTextListener(this);
return true;
[...]
}

Also I added these functions:

public boolean onQueryTextChange(String newText) {
    ListView listview1= (ListView) findViewById(R.id.mylist);
    listview1.setFilterText(newText);
    //mFilter.filter(newText);
    return false;
}

public boolean onQueryTextSubmit(String query) {
    ListView listview1= (ListView) findViewById(R.id.mylist);
    listview1.setFilterText(query);
}

Now the filtering is working fine, but this overlay with the searched char sequence is hiding the filtered data -> it doesn’t look well.

As I read everywhere, there’s no simple possibility to turn this overlay off.
So I changed my code a bit:

onPostExecute(blaaaaa) { [...]
     //Filter mFilter= = new ArrayAdapter<String>(getApplicationContext(), R.layout.list_item, nameList).getFilter();

and the two functions:

 //mFilter.filter(the_entered_text);
 ((ArrayAdapter<String>)listAdapter).getFilter().filter(query);
 ((ArrayAdapter<String>)listAdapter).notifyDataSetChanged();

My question is now, how can I let the listView get updated?
That “listview1.notifyDataSetChanged()” is no option for me, because it isn’t available for my ListAdapter.

EDIT: cast the adapter, as in an answer postet, now it works, but it filters so: entered text= “ka” -> all entries, which start with “ka” are displayed, not the ones which contain “ka”.

Answer 1

listview1.getAdapter().notifyDataSetChanged()

Simples