listview doesn't refresh in android fragment with notifyDataSetChanged() - android-fragments

Question

In my android application, I am unable to solve this issue since two months even after trying so many similar solutions found at Stack Overflow. I am populating the listview with an ArrayAdapter. When an item of listview is pressed for long, a dialog box appears and asks for confirmation. After confirmation, the selected item gets deleted from the array-list but in listview last item seems to be removed. When you close the fragment and come back to it, you see the correct items but not immediately after closing the alert dialog.
Can anyone please help? Thanks!
Adapter Class
public class DuasListAdapter extends ArrayAdapter<String>{
// class variables
private final Context context;// to save context
private final List<String> duas;// to save list of stores
LayoutInflater inflater;// so save layout inflater for the view
public DuasListAdapter(Context ctx, List<String> duasList) {
super(ctx, R.layout.adapter_list_duas, duasList);
context = ctx;// save context
duas = duasList;// save list of stores
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);// save inflater layout
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
convertView=inflater.inflate(R.layout.adapter_list_duas, parent, false);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
holder.duaIndex = position;
if(SingletonClass.duasAra.get(holder.duaIndex)!=""){
holder.tv_dua_arabic.setText(SingletonClass.duasAra.get(holder.duaIndex));
}
else{
if(keyUrdSel && !keyEngSel)
holder.tv_dua_arabic.setText(SingletonClass.duasTitUrd.get(holder.duaIndex));
else
holder.tv_dua_arabic.setText(SingletonClass.duasTitEng.get(holder.duaIndex));
}
holder.tv_dua_no.setText(" ("+ (holder.duaIndex+1));
return convertView;
}
static class ViewHolder {
int duaIndex;
LinearLayout background;// background to display color for read and unread messages
ImageView iv_duatype;
TextView tv_dua_arabic;// title of message
TextView tv_dua_ref;// message by and message created on
TextView tv_dua_no;
/**
* #description constructor to save context and list of stores views
* #param v to refer the view
* #return
*/
public ViewHolder(View v) {
// initialize their respective views
background = (LinearLayout) v.findViewById(R.id.ll_duas_list);
iv_duatype = (ImageView) v.findViewById(R.id.iv_duatype);
tv_dua_arabic = (TextView) v.findViewById(R.id.tv_dua_arabic);
tv_dua_no = (TextView) v.findViewById(R.id.dua_no);
}
}
Fragment Class
public class DuasListFragment extends Fragment {
Context context;
LinearLayout ll_back_duas_list_header;
TextView ll_back_duas_list_header_title;
ListView lvDuaas;
public DuasListAdapter duasAdapter;
int intListViewItemPosition = -1;
ArrayList<String> duas;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
context = inflater.getContext();
View view = inflater.inflate(R.layout.fragment_list_duas, container, false);
// TODO Auto-generated method stub
return view;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
ll_back_duas_list_header = (LinearLayout) getActivity().findViewById(R.id.ll_back_duas_list_header);
ll_back_duas_list_header_title = (TextView) getActivity().findViewById(R.id.ll_back_duas_list_header_title);
lvDuaas = (ListView) getActivity().findViewById(R.id.lv_duas);
String verses = new SharedPreferencesSupplication().read(SingletonClass.keyListOfVerses, "a1");
String[] versesList = verses.split(",");
duas = new ArrayList<String>();
for (int i = 0; i < versesList.length; i++) {
if (versesList[i].length() > 0)
duas.add(versesList[i]);
}
duasAdapter = new DuasListAdapter(context, duas);
lvDuaas.setAdapter(duasAdapter);
lvDuaas.setOnItemLongClickListener(new OnItemLongClickListener() {
#Override
public boolean onItemLongClick(final AdapterView<?> parent,
View view, final int position, long id) {
// TODO Auto-generated method stub
DialogInterface.OnClickListener dialogClickListener = new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case DialogInterface.BUTTON_POSITIVE:
duasAdapter = (DuasListAdapter) parent.getAdapter();
duas.remove(position);
duasAdapter.notifyDataSetChanged();
((MainActivity) context).removeItemFromList(position);
break;
case DialogInterface.BUTTON_NEGATIVE:
// No button clicked
break;
}
}
};
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setMessage("Delete Dua from Favorites?").setPositiveButton("Yes", dialogClickListener).setNegativeButton("No", dialogClickListener).show();
return true;
}
});
super.onActivityCreated(savedInstanceState);
}
#Override
public void onResume() {
// TODO Auto-generated method stub
super.onResume();
// duasAdapter.clear();
//duasAdapter.addAll(duas);
duasAdapter.notifyDataSetChanged();
}
}

Answer 1

I also faced same problem with notifydatasetchanged method.
My problem was List that I had attached to adapter was getting updated but notifydatasetchanged method was not working.
If your ListView is designed to show moderate number of items in it,instead of calling notifydatasetchanged you can recreate your adapter.
It worked for me.I wasusing BaseAdapter.