Question

After deleting from database my ListView does not update , I found a method on stackoverflow by it does not work, here is how I populate my list:

...
private ListView list;
ListAdapter adapter; (ListAdapter is a class from here i set the layout of a row)
...
...

protected void onCreate(Bundle savedInstanceState) {
     ...
     ...
      database info = new database(this);
  info.open();
  data = info.getData2();
  data2 = info.getData3();
  info.close();   
  list=(ListView)findViewById(R.id.list);   
  adapter=new ListAdapter(this, data , data2);
  list.setAdapter(adapter);
      registerForContextMenu(list);
      ...
      ...
 }

 ...
 ...
 public boolean onContextItemSelected(MenuItem item) {
    AdapterView.AdapterContextMenuInfo info =(AdapterView.AdapterContextMenuInfo)item.getMenuInfo();
        ...
        ...
        if(menuItemName.equals("Delete")){
        menuItemName = "2";
        Log.i(TAG,"Primul "+listItemName + " " + " al doilea " + listItemName2);
        database delete = new database(this);
        delete.open();          
    delete.deleteEntryFromList(listItemName,listItemName2);
    delete.close();
        //here i am suposed to do
            adapter.notifyDataSetChanged();
        //but it does not work
        }
 }

Can somebody help me here ?

Answer 1

I always have problems with the notify methods. Easiest solution: Create a method that is called updateAdapter(), replace the notify call with that and put this in it:

  private void updateAdapter(){
  database info = new database(this);
  info.open();
  data = info.getData2();
  data2 = info.getData3();
  info.close();   
  list=(ListView)findViewById(R.id.list);   
  adapter=new ListAdapter(this, data , data2);
  list.setAdapter(adapter);
      registerForContextMenu(list);
}   

Call that instead of the notify* method.