What you want to be doing here is getting a handle on the active ArrayList being used by the ListView right now and then manipulate that data directly and when you're done fire notifyDataSetChanged on that adapter. It looks from your code snippet above that you are creating a new ArrayList every time you want to manipulate the data. Just work with the one you already have, you can clear it and re-add items or delete items or whatever you want. This is what I have done to get notifyDataSetChanged to work on my ListViews.
On Mar 19, 10:34 pm, kavitha <[email protected]> wrote: > Thanks MarkMurphy. > > But still i am not able to clear list items and populate with new > items,,,new items get added up to old items. > > my code is this > > ArrayAdapter<String> adapter; > ArrayList<String> results=new ArrayList<String>(); > > private void populateStationsList(RadioStation[] radioStation){ > results.clear(); > stationsList=(ListView) findViewById(R.id.station_list); > > stationsList.setTranscriptMode(ListView.TRANSCRIPT_MODE_ALWAYS_SCROLL); > > for (int i=0; i<radioStation.length; i++) { > String s=radioStation[i].getName(); > > results.add(s); > } > stationsList.setSelectionFromTop(1, 1); > > adapter = new ArrayAdapter<String>(this, > android.R.layout.simple_list_item_1, results); > > stationsList.setAdapter(adapter); > adapter.notifyDataSetChanged(); > stationsList.setOnItemClickListener(this); > > } > > On Fri, Mar 19, 2010 at 6:31 PM, Mark Murphy <[email protected]>wrote: > > > > > kavitha wrote: > > > Hi All, > > > > How to remove all Items in a ListView in android. > > > > I want to remove all items in list view and populate with new items > > > dynamically from a background thread. > > > > Please tell,,this is very urgent. > > > Replace the adapter used by the ListView. > > > -- > > Mark Murphy (a Commons Guy) > >http://commonsware.com|http://twitter.com/commonsguy > > > Android Training in US: 14-18 June 2010:http://bignerdranch.com > > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to [email protected] > > To unsubscribe from this group, send email to > > [email protected]<android-developers%2Bunsubs > > [email protected]> > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en > > > To unsubscribe from this group, send email to android-developers+ > > unsubscribegooglegroups.com or reply to this email with the words "REMOVE > > ME" as the subject. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en To unsubscribe from this group, send email to android-developers+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.
