Question

Basically i have been try to do the damn this for over 40 hours – read all threads about it and still no result!!! So I can’t update list adapter in list view while posting in onPostExecute adapter.notifyDataSetChanged();

ArrayAdapter<String> adapter;
private ProgressDialog dialog;



protected void onCreate(Bundle savedInstanceState) 
{

    super.onCreate(savedInstanceState);

    setListAdapter(adapter);
    dialog = new ProgressDialog(
            Table.this);
    dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        dialog.setMessage("Загружаю. Подождите..."); 

    AsyncTask<Void, Void, Void> loadingTask = new AsyncTask<Void, Void, Void>() {
        @Override
        protected void onPreExecute() {                                     
              dialog.show();
        }

        @Override
        protected Void doInBackground(Void... params) {                 

  ........ adapter = new ArrayAdapter<String>(Table.this,         android.R.layout.simple_list_item_1,CreateStringArray
   .getString(myData, null, null, null, null));

            return null;
        }
        @Override
        protected void onPostExecute(Void result) {  
          adapter.notifyDataSetChanged();      
         Table.this.
            dialog.dismiss();
        }

    };          
    loadingTask.execute();  



    getListView().setOnItemClickListener(this);

}

So it shows me the spinner and successfully load and deletes it. After a while of debugging i noticed that it successfully changes data in the adapter. Still it dent display it. Am working with listvew

Answer 1

By instantiating a new Adapter in doInBackGround you lose the reference to the adapter you set doing setListAdapter(adapter); Therefore, the adapter you notify in OnPostExecute is not the one in your ListView.