flutter_google_places 0.1.3

Google places autocomplete widgets for flutter. No wrapper, use https://pub.dartlang.org/packages/google_maps_webservice

example/lib/main.dart

import 'dart:async';

import 'package:google_maps_webservice/places.dart';
import 'package:flutter_google_places/flutter_google_places.dart';
import 'package:flutter/material.dart';

const kGoogleApiKey = "API_KEY";

// to get places detail (lat/lng)
GoogleMapsPlaces _places = GoogleMapsPlaces(kGoogleApiKey);

main() {
  runApp(RoutesWidget());
}

class RoutesWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) => MaterialApp(
        title: "My App",
        theme: ThemeData(
          primarySwatch: Colors.blue,
          brightness: Brightness.dark,
          accentColor: Colors.redAccent,
          inputDecorationTheme: InputDecorationTheme(
            border: OutlineInputBorder(
              borderRadius: BorderRadius.all(Radius.circular(4.00)),
            ),
            contentPadding: EdgeInsets.symmetric(
              vertical: 12.50,
              horizontal: 10.00,
            ),
          ),
        ),
        routes: {
          "/": (_) => MyApp(),
          "/search": (_) => CustomSearchScaffold(),
        },
      );
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

final homeScaffoldKey = GlobalKey<ScaffoldState>();
final searchScaffoldKey = GlobalKey<ScaffoldState>();

class _MyAppState extends State<MyApp> {
  Mode _mode = Mode.overlay;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      key: homeScaffoldKey,
      appBar: AppBar(
        title: Text("My App"),
      ),
      body: Center(
          child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          DropdownButton(
              value: _mode,
              items: <DropdownMenuItem<Mode>>[
                DropdownMenuItem<Mode>(
                    child: Text("Overlay"), value: Mode.overlay),
                DropdownMenuItem<Mode>(
                    child: Text("Fullscreen"), value: Mode.fullscreen),
              ],
              onChanged: (m) {
                setState(() {
                  _mode = m;
                });
              }),
          RaisedButton(
              onPressed: () async {
                // show input autocomplete with selected mode
                // then get the Prediction selected
                Prediction p = await PlacesAutocomplete.show(
                    context: context,
                    apiKey: kGoogleApiKey,
                    onError: (res) {
                      homeScaffoldKey.currentState.showSnackBar(
                          SnackBar(content: Text(res.errorMessage)));
                    },
                    mode: _mode,
                    language: "fr",
                    components: [Component(Component.country, "fr")]);

                displayPrediction(p, homeScaffoldKey.currentState);
              },
              child: Text("Search places")),
          RaisedButton(
            child: Text("Custom"),
            onPressed: () {
              Navigator.of(context).pushNamed("/search");
            },
          ),
        ],
      )),
    );
  }
}

Future<Null> displayPrediction(Prediction p, ScaffoldState scaffold) async {
  if (p != null) {
    // get detail (lat/lng)
    PlacesDetailsResponse detail = await _places.getDetailsByPlaceId(p.placeId);
    final lat = detail.result.geometry.location.lat;
    final lng = detail.result.geometry.location.lng;

    scaffold
        .showSnackBar(SnackBar(content: Text("${p.description} - $lat/$lng")));
  }
}

// custom scaffold that handle search
// basically your widget need to extends [GooglePlacesAutocompleteWidget]
// and your state [GooglePlacesAutocompleteState]
class CustomSearchScaffold extends PlacesAutocompleteWidget {
  CustomSearchScaffold()
      : super(
          apiKey: kGoogleApiKey,
          language: "en",
          components: [Component(Component.country, "uk")],
        );

  @override
  _CustomSearchScaffoldState createState() => _CustomSearchScaffoldState();
}

class _CustomSearchScaffoldState extends PlacesAutocompleteState {
  @override
  Widget build(BuildContext context) {
    final appBar = AppBar(title: AppBarPlacesAutoCompleteTextField());
    final body = PlacesAutocompleteResult(onTap: (p) {
      displayPrediction(p, searchScaffoldKey.currentState);
    });
    return Scaffold(key: searchScaffoldKey, appBar: appBar, body: body);
  }

  @override
  void onResponseError(PlacesAutocompleteResponse response) {
    super.onResponseError(response);
    searchScaffoldKey.currentState.showSnackBar(
      SnackBar(content: Text(response.errorMessage)),
    );
  }

  @override
  void onResponse(PlacesAutocompleteResponse response) {
    super.onResponse(response);
    if (response != null && response.predictions.isNotEmpty) {
      searchScaffoldKey.currentState.showSnackBar(
        SnackBar(content: Text("Got answer")),
      );
    }
  }
}