google places search in flutter

main.dart

import 'dart:async';

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

const kGoogleApiKey = ""; //add your key here 

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

class RoutesWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) => MaterialApp(
        title: "My App",
        debugShowCheckedModeBanner: false,
        routes: {
          "/": (_) => CustomSearchScaffold(),
        },
      );
}

Future<Null> displayPrediction(Prediction p, ScaffoldState scaffold) async {
  if (p != null) {
    // get detail (lat/lng)
    GoogleMapsPlaces _places = GoogleMapsPlaces(
      apiKey: kGoogleApiKey,
      apiHeaders: await const GoogleApiHeaders().getHeaders(),
    );
    PlacesDetailsResponse detail =
        await _places.getDetailsByPlaceId(p.placeId!);
    final lat = detail.result.geometry!.location.lat;
    final lng = detail.result.geometry!.location.lng;
/**
 * Afther click on the search result, the app will display the result in the
 */

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

class CustomSearchScaffold extends PlacesAutocompleteWidget {
  CustomSearchScaffold()
      : super(
            apiKey: kGoogleApiKey,
            sessionToken: Uuid().v4(),
            language: "en",
            types: ['address'],
            components: [],
            strictbounds: false);

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

class _CustomSearchScaffoldState extends PlacesAutocompleteState {
  final homeScaffoldKey = GlobalKey<ScaffoldState>();
  final searchScaffoldKey = GlobalKey<ScaffoldState>();
  @override
  Widget build(BuildContext context) {
    final appBar = AppBar(
      title: AppBarPlacesAutoCompleteTextField(),
    );
    final body = PlacesAutocompleteResult(
        onTap: (p) {
          displayPrediction(p, searchScaffoldKey.currentState!);
        },
        logo: Container());
    return Scaffold(
        key: searchScaffoldKey,
        bottomNavigationBar: BottomSheet(
          elevation: 12.0,
          backgroundColor: Colors.white,
          onClosing: () {
            print("Bottom sheet closed");
          },
          builder: (context) {
            return Padding(
              padding: const EdgeInsets.all(8.0),
              child: Container(
                height: MediaQuery.of(context).size.height * 0.3,
                child: body,
              ),
            );
          },
        ),
        appBar: appBar,
        body: Container(
          child: Text("Your Body"),
        ));
  }
}