native_address_autocomplete

A customizable Flutter address autocomplete TextField powered by native platform APIs.

Features

• No Google API key required.
• iOS uses Apple MapKit MKLocalSearchCompleter.
• Android uses the platform Geocoder.
• Includes a TextField-style widget with a dropdown.
• Customize debounce, minimum characters, result limit, countries, dropdown height, item UI, and the full suggestions list.
• Shows a trailing loading indicator while searching.
• Optional clear button, error UI, keyboard navigation, and matched-text highlight.
• Resolve a selected suggestion into coordinates and address components.
• Optional FormField and external state controller.
• Use the system language by default, or pass a custom locale where supported.

Android Geocoder is best-effort and depends on the device's available geocoding service. It is useful for lightweight address suggestions, but it is not a full replacement for Google Places Autocomplete in delivery-critical flows.

Usage

NativeAddressAutocompleteTextField(
  addressController: AddressAutocompleteController(),
  countries: const ['US', 'CA'],
  limit: 5,
  dropdownMaxHeight: 280,
  showLoadingIndicator: true,
  showClearButton: true,
  resolveOnSelected: true,
  useSystemLocale: true,
  // Android applies this locale to Geocoder. iOS MapKit follows system/app
  // language and ignores per-request locale overrides.
  locale: const Locale('fr', 'CA'),
  resultTypes: const {
    AddressResultType.address,
    AddressResultType.pointOfInterest,
  },
  decoration: const InputDecoration(
    labelText: 'Address',
    border: OutlineInputBorder(),
  ),
  itemBuilder: (context, suggestion, index) {
    return ListTile(
      title: Text(suggestion.primaryText),
      subtitle: suggestion.secondaryText == null
          ? null
          : Text(suggestion.secondaryText!),
    );
  },
  onSelected: (suggestion) {
    debugPrint(suggestion.fullText);
  },
  onResolved: (address) {
    debugPrint(address.city);
    debugPrint('${address.latitude}, ${address.longitude}');
  },
  errorBuilder: (context, error) {
    return const Padding(
      padding: EdgeInsets.all(16),
      child: Text('Could not load suggestions.'),
    );
  },
)

Use it inside a Form:

final formKey = GlobalKey<FormState>();

Form(
  key: formKey,
  child: NativeAddressAutocompleteFormField(
    showClearButton: true,
    validator: (address) {
      return address == null ? 'Address required' : null;
    },
    onSaved: (address) {
      debugPrint(address?.fullText);
    },
  ),
)

Customize the trailing loading indicator:

NativeAddressAutocompleteTextField(
  loadingIndicatorBuilder: (context) {
    return const Padding(
      padding: EdgeInsets.all(12),
      child: CircularProgressIndicator.adaptive(strokeWidth: 2),
    );
  },
)

You can also use the client directly:

const autocomplete = NativeAddressAutocomplete();

final available = await autocomplete.isAvailable();

final suggestions = await autocomplete.suggest(
  '1600 Amph',
  countries: const ['US'],
  limit: 5,
  resultTypes: const {AddressResultType.address},
  localeTag: 'zh-Hant-TW',
);

final address = await autocomplete.resolve(suggestions.first);

debugPrint(address?.street);
debugPrint(address?.postalCode);

The dropdown opens below the text field. If there is not enough room, it uses the available height and scrolls its contents.

Platform notes

• iOS suggestions use MKLocalSearchCompleter; selected suggestions are resolved with MKLocalSearch.
• Android suggestions and resolution use Geocoder. Availability and quality depend on the device geocoding service.
• locale / localeTag is applied on Android. iOS MapKit uses the system/app language for local search results.