Flutter谷歌地点搜索插件flutter_google_places_web的使用

发布于 1周前 作者 songsunli 来自 Flutter

Flutter Google Places Web

pub version donate

A web designed form field for Google Places Autocomplete

flutterwebplaces

API Key

To use this library, you need a Web API key. Here

Usage

FlutterGooglePlacesWeb is a Google Places Autocomplete field for Flutter Web.

import 'package:flutter_google_places_web/flutter_google_places_web.dart';

FlutterGooglePlacesWeb(
  apiKey: <GOOGLE_API_KEY>,
  proxyURL: 'https://cors-anywhere.herokuapp.com/',
  components: 'country:us',
),

If you encounter XMLHttpRequest errors, please use a proxy. For more information, please see cors-anywhere.

If you are using the demo CORS Anywhere proxy (included in the example) - please allow temporary access or use your own proxy

If a user types and selects “1600 Amphitheatre Parkway,” you can retrieve the data as follows:

String name = FlutterGooglePlacesWeb.value['name'];
String streetAddress = FlutterGooglePlacesWeb.value['streetAddress'];
String city = FlutterGooglePlacesWeb.value['city'];
String country = FlutterGooglePlacesWeb.value['country'];

print(name); // '1600 Amphitheatre Parkway, Mountain View, CA, USA'
print(streetAddress); // '1600 Amphitheatre Parkway'
print(city); // 'CA'
print(country); // 'USA'

Roadmap

  • [Coming soon] Add multiplatform support and remove CORS issues by having a JavaScript API rather than HTTP requests

Example

Here is a complete example of how to use FlutterGooglePlacesWeb in a Flutter application:

import 'package:flutter/material.dart';
import 'package:flutter_google_places_web/flutter_google_places_web.dart';

const kGoogleApiKey = "YOUR_API_KEY";

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Google Places Web',
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  String test = '';

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Google Places Web'),
      ),
      body: Center(
        child: Container(
          padding: EdgeInsets.only(top: 150),
          width: 500,
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            mainAxisSize: MainAxisSize.min,
            children: <Widget>[
              Text(
                'Address autocomplete',
                style: TextStyle(fontSize: 20),
              ),
              FlutterGooglePlacesWeb(
                apiKey: kGoogleApiKey,
                proxyURL: 'https://cors-anywhere.herokuapp.com/',
                required: true,
              ),
              SizedBox(height: 20),
              TextButton(
                onPressed: () {
                  final place = FlutterGooglePlacesWeb.value;
                  if (place != null) {
                    print(place['name']); // '1600 Amphitheatre Parkway, Mountain View, CA, USA'
                    print(place['streetAddress']); // '1600 Amphitheatre Parkway'
                    print(place['city']); // 'Mountain View'
                    print(place['country']); // 'USA'
                    setState(() {
                      test = place['name'] ?? '';
                    });
                  }
                },
                child: Text('Press to test'),
              ),
              SizedBox(height: 20),
              Text(
                test,
                style: TextStyle(fontSize: 18),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

Notes

  1. Replace YOUR_API_KEY with your actual Google Places API key.
  2. Ensure that the API key has the necessary permissions to access the Google Places API.
  3. If you encounter CORS issues, consider setting up your own proxy server or using a different proxy service.

This example demonstrates how to integrate the FlutterGooglePlacesWeb widget into a Flutter application, allowing users to search for and select addresses from the Google Places API. The selected address details are then displayed on the screen.


更多关于Flutter谷歌地点搜索插件flutter_google_places_web的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

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更多关于Flutter谷歌地点搜索插件flutter_google_places_web的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html


当然，以下是一个关于如何使用 flutter_google_places_web 插件在 Flutter Web 应用中实现谷歌地点搜索的示例代码。这个插件允许你在 Flutter Web 应用中集成谷歌地点搜索功能。

首先，确保你已经在 pubspec.yaml 文件中添加了 flutter_google_places_web 依赖：

dependencies:
  flutter:
    sdk: flutter
  flutter_google_places_web: ^0.x.x  # 请使用最新版本号

然后，运行 flutter pub get 来获取依赖。

接下来，在你的 Flutter Web 应用中实现谷歌地点搜索功能。以下是一个完整的示例：

import 'package:flutter/material.dart';
import 'package:flutter_google_places_web/flutter_google_places_web.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Google Places Web Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: GooglePlacesScreen(),
    );
  }
}

class GooglePlacesScreen extends StatefulWidget {
  @override
  _GooglePlacesScreenState createState() => _GooglePlacesScreenState();
}

class _GooglePlacesScreenState extends State<GooglePlacesScreen> {
  final GooglePlaces _googlePlaces = GooglePlaces(apiKey: 'YOUR_API_KEY');
  List<Prediction> _predictions = [];

  Future<void> _searchPlaces(String query) async {
    try {
      PredictionResult predictionResult = await _googlePlaces.autocomplete(query);
      setState(() {
        _predictions = predictionResult.predictions!;
      });
    } catch (e) {
      print(e);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Google Places Search'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            TextField(
              decoration: InputDecoration(
                labelText: 'Search for a place',
                border: OutlineInputBorder(),
              ),
              onChanged: (query) {
                _searchPlaces(query);
              },
            ),
            SizedBox(height: 16),
            Expanded(
              child: _predictions.isEmpty
                  ? Center(child: Text('No predictions found'))
                  : ListView.builder(
                      itemCount: _predictions.length,
                      itemBuilder: (context, index) {
                        Prediction prediction = _predictions[index];
                        return ListTile(
                          title: Text(prediction.description!),
                          onTap: () {
                            // Handle the selected prediction, e.g., get place details
                            print('Selected: ${prediction.description}');
                          },
                        );
                      },
                    ),
            ),
          ],
        ),
      ),
    );
  }
}

在上面的代码中，我们做了以下几件事：

  1. 创建一个 GooglePlaces 实例，并传入你的谷歌地点搜索 API 密钥。
  2. 在 GooglePlacesScreen 中，定义一个 _predictions 列表来存储搜索预测结果。
  3. 使用 TextField 来接受用户输入，并在输入变化时调用 _searchPlaces 函数进行搜索。
  4. 在 _searchPlaces 函数中，使用 autocomplete 方法获取预测结果，并更新 _predictions 列表。
  5. 使用 ListView.builder 来显示预测结果列表，每个预测结果都是一个 ListTile，用户点击时可以处理选中的预测（例如，获取详细信息）。

请确保将 'YOUR_API_KEY' 替换为你的实际谷歌地点搜索 API 密钥。

这个示例展示了如何在 Flutter Web 应用中使用 flutter_google_places_web 插件进行地点搜索，并显示搜索结果。你可以根据需要进一步扩展和自定义这个示例。

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