[Bug] Keyboard opens and closes when clicking on the search bar in web while in mobile

[npateras]

Steps to reproduce

1. Use the example in flutter web and open the web app in a mobile device.
2. Open the dropdown and click on the searchbar.

Expected results

• When the searchbar is clicked inside the dropdown, the keyboard opens and stays open.

Actual results:

• When the searchbar is clicked inside the dropdown, the keyboard opens and closes rendering you unable to even type any text in it.

Code sample:

final List<String> items = [
  'A_Item1',
  'A_Item2',
  'A_Item3',
  'A_Item4',
  'B_Item1',
  'B_Item2',
  'B_Item3',
  'B_Item4',
];

final valueListenable = ValueNotifier<String?>(null);
final TextEditingController textEditingController = TextEditingController();

@override
void dispose() {
  textEditingController.dispose();
  super.dispose();
}

@override
Widget build(BuildContext context) {
  return Scaffold(
    body: Center(
      child: DropdownButtonHideUnderline(
        child: DropdownButton2<String>(
          isExpanded: true,
          hint: Text(
            'Select Item',
            style: TextStyle(
              fontSize: 14,
              color: Theme.of(context).hintColor,
            ),
          ),
          items: items
              .map((item) => DropdownItem(
                    value: item,
                    height: 40,
                    child: Text(
                      item,
                      style: const TextStyle(
                        fontSize: 14,
                      ),
                    ),
                  ))
              .toList(),
          valueListenable: valueListenable,
          onChanged: (value) {
            valueListenable.value = value;
          },
          buttonStyleData: const ButtonStyleData(
            padding: EdgeInsets.symmetric(horizontal: 16),
            height: 40,
            width: 200,
          ),
          dropdownStyleData: const DropdownStyleData(
            maxHeight: 200,
          ),
          dropdownSearchData: DropdownSearchData(
            searchController: textEditingController,
            searchBarWidgetHeight: 50,
            searchBarWidget: Container(
              height: 50,
              padding: const EdgeInsets.only(
                top: 8,
                bottom: 4,
                right: 8,
                left: 8,
              ),
              child: TextFormField(
                expands: true,
                maxLines: null,
                controller: textEditingController,
                decoration: InputDecoration(
                  isDense: true,
                  contentPadding: const EdgeInsets.symmetric(
                    horizontal: 10,
                    vertical: 8,
                  ),
                  hintText: 'Search for an item...',
                  hintStyle: const TextStyle(fontSize: 12),
                  border: OutlineInputBorder(
                    borderRadius: BorderRadius.circular(8),
                  ),
                ),
              ),
            ),
            noResultsWidget: const Padding(
              padding: EdgeInsets.all(8),
              child: Text('No Item Found!'),
            ),
            searchMatchFn: (item, searchValue) {
              return item.value.toString().contains(searchValue);
            },
          ),
          //This to clear the search value when you close the menu
          onMenuStateChange: (isOpen) {
            if (!isOpen) {
              textEditingController.clear();
            }
          },
        ),
      ),
    ),
  );
}

Details:

• dropdown_button2: 3.0.0-beta.22
• flutter: 3.29.2
• dart: 3.7.2

[npateras]

Update: Using TextField instead of TextFormField fixes the issue, however, having autofocus: true doesn't automatically open the keyboard when opening the dropdown.

[AhmedLSayed9]

I couldn't reproduce it. Can you provide more details?

https://github.com/user-attachments/assets/edd20bc1-779a-4e9d-a5ea-f54bda0bb350

[npateras]

Interestingly, I didn't test iOS web, I will check again and let you know, I was able to reproduce on Android web.

[npateras]

@AhmedLSayed9 I was not able to reproduce on iOS, this seems like an Android bug