How can I add registerOnSharedPreferenceChangeListener on to a ListActivity?
When I call intent
public class TInfo extends ListActivity
implements OnSharedPreferenceChangeListener{
@Override
public void onCreate(Bundle icicle) {
super.onCrea开发者_StackOverflow中文版te(icicle);
prefs = PreferenceManager.getDefaultSharedPreferences(this);
initvars();
setListAdapter(new TAdapter()); // class TAdapter extends ArrayAdapter<String>
}
where and how do I call registerOnSharedPreferenceChangeListener
In your case it will be something like this:
public class TInfo extends ListActivity
implements OnSharedPreferenceChangeListener{
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
prefs = PreferenceManager.getDefaultSharedPreferences(this);
initvars();
setListAdapter(new TAdapter()); // class TAdapter extends ArrayAdapter<String>
}
@Override
public void onSharedPreferenceChanged (SharedPreferences sharedPreferences, String key){
// do whatever you want here
}
}
onSharedPreferenceChanged
is called when a shared preference is changed, added, or removed. This may be called even if a preference is set to its existing value.
精彩评论