AutocompleteTextView with async suggestions doesn't show dropdown

Question

I add `TextChangedListener` to `AutocompleteTextView`. In `TextChangedListener`'s `afterTextChanged()` I invoke `AsyncTask` which loads data from web (loading all the data when activity starts is not an option because lists can be pretty large, so it becomes just waste of traffic). `AsyncTask`'s `onPostExecute()` looks like that (I use `ArrayAdapter`): ``` @Override protected void onPostExecute(ArrayList result) { super.onPostExecute(result); if (result != null) { adapter.clear(); for (Iterator iterator = result.iterator(); iterator.hasNext();) { Subregion subregion = iterator.next(); adapter.add(subregion); } adapter.notifyDataSetChanged(); autocompleteTextView.showDropDown(); } } ``` `Subregion` is my custom object with overriden `toString()`. I want my program to start loading data when user starts typing and show results at once they are received and parsed. My problem: `autocompleteTextView.showDropDown()` has no effect. `onPostExecute()` receives correct li…

Accepted Answer

I am doing the exact same thing, and I just achieved this functionality. Instead of clearing the adapter and building it individually, set the adapter as below(I do this in a function which is called in the onPostExecute);

```
//suggestions is a string array of suggestions.
suggestAdapter = new ArrayAdapter<String>(this, R.layout.suggestions, suggestions);
//The autocomplete view 
suggestions.setAdapter(this.suggestAdapter);
suggestAdapter.notifyDataSetChanged();
```

You do not need to explicitly call showdropdown, the autocomplete view is automatically updated when the adapter notifies it that data has been changed.

You also can call

```
adapter.setNotifyOnChange(true)
```

which makes it unnecessary to call

```
adapter.notifyDatasetChanged()
```

See setNotifyOnChange Hope I could be of help.

AutocompleteTextView with async suggestions doesn't show dropdown

Solution

Problem