Flutter DropdownSearch

Simple and highly customizable Flutter Dropdown with a lot of features (search, adaptive, async/sync values, ...) with multi mode like menu, modal, dialog, bottomSheet and etc.

Dropdown search

Key Features

Reactive widget
Infinite list (lazy loading)
Sync and/or Async items (online, offline, DB, ...)
Searchable dropdown
Support multi level items
Five dropdown modes: Menu / BottomSheet / ModalBottomSheet / Dialog / autocomplete
Single & multi selection
Adaptive platform UI : Material, Adaptive, Cupertino
Easy customizable UI - No Boilerplate

pubspec.yaml

dropdown_search: <lastest version>

Import

import 'package:dropdown_search/dropdown_search.dart';

Adaptive Platform UI

To use Material ui (by default) use DropdownSearch<T>(...) or DropdownSearch<T>.multiSelection(...)
for the cupertino mode use CupertinoDropdownSearch<T>(...) or CupertinoDropdownSearch<T>.multiSelection(...)
To let the package pick the suitable platform UI based on the used platform, use AdaptiveDropdownSearch<T>(...) or AdaptiveDropdownSearch<T>.multiSelection(...)
Bonus Tip: with adaptive platform ui you can use different PopupMode depending on platform type:

AdaptiveDropdownSearch<T>(
    popupProps: AdaptivePopupProps(
        cupertinoProps: CupertinoPopupProps.bottomSheet(),
        materialProps: PopupProps.dialog()
    ),
)

Infinite Scroll

To enable infinite scroll all you have to do is to declare infiniteScrollProps and of course don't forget to pass loadProps to your API like this:

DropdownSearch<T>(
    items: (filter, loadProps) => _getDataFromAPI(filter, loadProps!.skip, loadProps!.take),
    popupProps: PopupProps.dialog(
        infiniteScrollProps: InfiniteScrollProps(
            loadProps: LoadProps(skip: 0, take: 10),
        ),
    ),
)

Simple implementation

See here

DropdownSearch<String>(
  items: (f, cs) => ["Item 1", 'Item 2', 'Item 3', 'Item 4'],
  popupProps: PopupProps.menu(
    disabledItemFn: (item) => item == 'Item 3',
    fit: FlexFit.loose
  ),
),

DropdownSearch<String>.multiSelection(
  mode: Mode.CUSTOM,
  items: (f, cs) => ["Monday", 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'],
  dropdownBuilder: (ctx, selectedItem) => Icon(Icons.calendar_month_outlined, size: 54),
),

DropdownSearch<(String, Color)>(
  clickProps: ClickProps(borderRadius: BorderRadius.circular(20)),
  mode: Mode.CUSTOM,
  items: (f, cs) => [
    ("Red", Colors.red),
    ("Black", Colors.black),
    ("Yellow", Colors.yellow),
    ('Blue', Colors.blue),
  ],
  compareFn: (item1, item2) => item1.$1 == item2.$1,
  popupProps: PopupProps.menu(
  menuProps: MenuProps(align: MenuAlign.bottomCenter),
    fit: FlexFit.loose,
    itemBuilder: (context, item, isDisabled, isSelected) => Padding(
      padding: const EdgeInsets.all(8.0),
      child: Text(item.$1, style: TextStyle(color: item.$2, fontSize: 16)),
    ),
  ),
  dropdownBuilder: (ctx, selectedItem) => Icon(Icons.face, color: selectedItem?.$2, size: 54),
),

DropdownSearch<(IconData, String)>(
  selectedItem: (Icons.person, 'Your Profile'),
  compareFn: (item1, item2) => item1.$1 == item2.$2,
  items: (f, cs) => [
    (Icons.person, 'Your Profile'),
    (Icons.settings, 'Setting'),
    (Icons.lock_open_rounded, 'Change Password'),
    (Icons.power_settings_new_rounded, 'Logout'),
  ],
  decoratorProps: DropDownDecoratorProps(
    decoration: InputDecoration(
      contentPadding: EdgeInsets.symmetric(vertical: 6),
      filled: true,
      fillColor: Color(0xFF1eb98f),
      border: OutlineInputBorder(
        borderSide: BorderSide(color: Colors.transparent),
        borderRadius: BorderRadius.circular(8),
      ),
      focusedBorder: OutlineInputBorder(
        borderSide: BorderSide(color: Colors.transparent),
        borderRadius: BorderRadius.circular(8),
      ),
      enabledBorder: OutlineInputBorder(
        borderSide: BorderSide(color: Colors.transparent),
        borderRadius: BorderRadius.circular(8),
      ),
    ),
  ),
  dropdownBuilder: (context, selectedItem) {
    return ListTile(
      leading: Icon(selectedItem!.$1, color: Colors.white),
      title: Text(
        selectedItem.$2,
        style: TextStyle(color: Colors.white, fontSize: 18, fontWeight: FontWeight.bold),
      ),
    );
  },
  popupProps: PopupProps.menu(
    itemBuilder: (context, item, isDisabled, isSelected) {
      return ListTile(
        contentPadding: EdgeInsets.symmetric(vertical: 8, horizontal: 12),
        leading: Icon(item.$1, color: Colors.white),
        title: Text(
          item.$2,
          style: TextStyle(color: Colors.white, fontSize: 18, fontWeight: FontWeight.bold),
        ),
      );
    },
    fit: FlexFit.loose,
    menuProps: MenuProps(
      backgroundColor: Colors.transparent,
      elevation: 0,
      margin: EdgeInsets.only(top: 16),
    ),
    containerBuilder: (ctx, popupWidget) {
      return Column(
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment: CrossAxisAlignment.end,
        children: [
          Padding(
            padding: const EdgeInsets.only(right: 12),
            child: Image.asset(
              'assets/images/arrow-up.png',
              color: Color(0xFF1eb98f),
              height: 14,
            ),
          ),
          Flexible(
            child: Container(
              decoration: BoxDecoration(
                color: Color(0xFF1eb98f),
                shape: BoxShape.rectangle,
                borderRadius: BorderRadius.circular(8),
              ),
              child: popupWidget,
            ),
          ),
        ],
      );
    },
  ),
),

DropdownSearch<String>(
  items: (filter, infiniteScrollProps) => ['Item 1', 'Item 2', 'Item 3'],
  suffixProps: DropdownSuffixProps(
    dropdownButtonProps: DropdownButtonProps(
      iconClosed: Icon(Icons.keyboard_arrow_down),
      iconOpened: Icon(Icons.keyboard_arrow_up),
    ),
  ),
  decoratorProps: DropDownDecoratorProps(
    textAlign: TextAlign.center,
    decoration: InputDecoration(
      contentPadding: EdgeInsets.symmetric(vertical: 20),
      filled: true,
      fillColor: Colors.white,
      border: OutlineInputBorder(
        borderSide: BorderSide(color: Colors.transparent),
        borderRadius: BorderRadius.circular(12),
      ),
      focusedBorder: OutlineInputBorder(
        borderSide: BorderSide(color: Colors.transparent),
        borderRadius: BorderRadius.circular(12),
      ),
      enabledBorder: OutlineInputBorder(
        borderSide: BorderSide(color: Colors.transparent),
        borderRadius: BorderRadius.circular(12),
      ),
      hintText: 'Please select...',
      hintStyle: TextStyle(fontWeight: FontWeight.bold, fontSize: 18, color: Colors.grey),
    ),
  ),
  popupProps: PopupProps.menu(
    itemBuilder: (context, item, isDisabled, isSelected) {
      return Padding(
        padding: const EdgeInsets.symmetric(vertical: 12.0),
        child: Text(
          item,
          style: TextStyle(fontWeight: FontWeight.bold, fontSize: 18),
          textAlign: TextAlign.center,
        ),
      );
    },
    constraints: BoxConstraints(maxHeight: 160),
    menuProps: MenuProps(
      margin: EdgeInsets.only(top: 12),
      shape: const RoundedRectangleBorder(borderRadius: BorderRadius.all(Radius.circular(12))),
    ),
  ),
),

DropdownSearch<UserModel>.multiSelection(
  items: (filter, s) => getData(filter),
  compareFn: (i, s) => i.isEqual(s),
  popupProps: PopupPropsMultiSelection.bottomSheet(
    bottomSheetProps: BottomSheetProps(backgroundColor: Colors.blueGrey[50]),
    showSearchBox: true,
    itemBuilder: userModelPopupItem,
    suggestedItemProps: SuggestedItemProps(
      showSuggestedItems: true,
      suggestedItems: (us) {
        return us.where((e) => e.name.contains("Mrs")).toList();
      },
    ),
  ),
),

DropdownSearch<int>(
  items: (f, cs) => List.generate(30, (i) => i + 1),
  decoratorProps: DropDownDecoratorProps(
    decoration: InputDecoration(labelText: "Dialog with title", hintText: "Select an Int"),
  ),
  popupProps: PopupProps.dialog(
    title: Container(
      decoration: BoxDecoration(color: Colors.deepPurple),
      alignment: Alignment.center,
      padding: EdgeInsets.symmetric(vertical: 16),
      child: Text(
        'Numbers 1..30',
        style: TextStyle(fontSize: 21, fontWeight: FontWeight.bold, color: Colors.white70),
      ),
    ),
    dialogProps: DialogProps(
      clipBehavior: Clip.antiAlias,
      shape: OutlineInputBorder(
        borderSide: BorderSide(width: 0),
        borderRadius: BorderRadius.circular(25),
      ),
    ),
  ),
),

Layout customization

You can customize the layout of the DropdownSearch and its items. click here for more examples.

Full documentation here

DropdownSearch Anatomy

Support

If this plugin was useful to you, helped you to deliver your app, saved you a lot of time, or you just want to support the project, I would be very grateful if you buy me a cup of coffee.

License

MIT