Hi!
I have a ListView with a custom Adapter that extends ArrayAdapter. It's
a ArrayAdapter of Type Artist. (There are about 1200 artists in my list)
Artist is a very small class that has a name and an id. The Artist Class
has toString() overridden to return just the name.
I have an EditText. The EditText has an TextChangeListener where i call
.getFilter().filter(chars, callback) on my adapter.
In the Filter.Filterlistener().onComplete() callback i print the count
and it looks really good. As i type the count decreases. So it seams
everything works as advertised, but the List stays the same. I tried to
call artistAdapter.notifyDataSetChanged() to force the list to redraw,
but nothing happens. [see 2.)]
I am tinkering around for days now! I am desperate.. Hopefully someone
can have a look on my code and tell me what i am doing wrong! How can i
force the list to be redrawn?
Thanks!
(I have posted this question also on stackoverflow:
http://stackoverflow.com/questions/2505800/filtered-listview-not-updated)
Here is what i have done:
1.) Defined a ListView and an EditText like this:
<EditText xmlns:android="http://schemas.android.com/apk/res/android";
android:id="@+id/list_search_text"
android:layout_width="fill_parent"
android:layout_height="35dip"
android:layout_below="@id/header">
</EditText>
<ListView xmlns:android="http://schemas.android.com/apk/res/android";
android:id="@+id/list_search"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
</ListView>
2.) Setup my ListView in the Activities onCreate():
private ListView listView = null;
private ArtistAdapter artistAdapter = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.search_artists);
artistAdapter = new ArtistAdapter(this, R.layout.row, list); //
'list' is an ArrayList<Artist>
listView = (ListView) findViewById(R.id.list_search);
listView.setAdapter(artistAdapter);
listView.setFastScrollEnabled(true);
listView.setTextFilterEnabled(true);
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> av, View v, int
position, long id) {
// do something
}
});
EditText txtSearch = (EditText) findViewById(R.id.list_search_text);
txtSearch.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable arg0) { }
public void beforeTextChanged(CharSequence arg0, int arg1,
int arg2, int arg3) { }
public void onTextChanged(CharSequence chars, int start, int
before, int count) {
artistAdapter.getFilter().filter(chars, new
Filter.FilterListener() {
public void onFilterComplete(int count) {
Log.d(Config.LOG_TAG, "filter complete! count: "
+ count);
artistAdapter.notifyDataSetChanged();
}
});
}
});
}
3.) This is my ArtistAdapter in short. I added an remove() and add() method:
public class ArtistAdapter extends ArrayAdapter<Artist> implements
SectionIndexer {
private List<Artist> items;
/* other stuff like overridden getView, getPositionForSection,
getSectionForPosition and so on */
@Override
public void remove(Artist object) {
super.remove(object);
items.remove(object);
}
@Override
public void add(Artist object) {
super.add(object);
items.add(object);
}
}
4.) My artist has also the toString() overridden:
public class Artist implements Comparable<Artist> {
public String uid;
public String name;
public Artist(String id, String name) {
this.uid = id;
this.name = name;
}
public int compareTo(Artist another) {
return this.name.compareToIgnoreCase(another.name);
}
@Override
public String toString() {
return this.name;
}
}
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