Flutter地点搜索插件free_place_search的使用
Flutter地点搜索插件free_place_search的使用
Free Place Search
使用Photon API进行地点搜索。
Usage
以下是如何在Flutter应用中使用free_place_search
插件的示例代码。
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
[@override](/user/override)
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
// 使用PlaceAutocomplete小部件
PlaceAutocomplete.widget(onDone: (e) {}),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: () => PlaceAutocomplete.show(
onDone: (e) {
Navigator.pop(context);
},
context: context),
tooltip: 'Increment',
child: const Icon(Icons.add),
),
);
}
}
完整示例代码
以下是完整的示例代码,用于展示如何在Flutter应用中集成地点搜索功能。
import 'package:flutter/material.dart';
import 'package:free_place_search/place_search.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
[@override](/user/override)
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
// 使用PlaceAutocomplete小部件
PlaceAutocomplete.widget(onDone: (e) {}),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: () => PlaceAutocomplete.show(
onDone: (e) {
Navigator.pop(context);
},
context: context),
tooltip: 'Increment',
child: const Icon(Icons.add),
),
);
}
}
更多关于Flutter地点搜索插件free_place_search的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
更多关于Flutter地点搜索插件free_place_search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,下面是一个关于如何在Flutter项目中使用free_place_search
插件进行地点搜索的示例代码。这个插件允许你通过Google Places API进行地点搜索。
首先,确保你已经在pubspec.yaml
文件中添加了free_place_search
依赖:
dependencies:
flutter:
sdk: flutter
free_place_search: ^最新版本号 # 请替换为最新的版本号
然后,运行flutter pub get
来获取依赖。
接下来,你需要在你的Flutter项目中配置Google Places API的API密钥。确保你已经在Google Cloud Platform上启用了Places API,并获取了API密钥。
下面是一个完整的示例代码,展示了如何使用free_place_search
插件:
import 'package:flutter/material.dart';
import 'package:free_place_search/free_place_search.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Place Search Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: PlaceSearchScreen(),
);
}
}
class PlaceSearchScreen extends StatefulWidget {
@override
_PlaceSearchScreenState createState() => _PlaceSearchScreenState();
}
class _PlaceSearchScreenState extends State<PlaceSearchScreen> {
final TextEditingController _controller = TextEditingController();
List<Prediction> _predictions = [];
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Place Search Demo'),
),
body: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
children: [
TextField(
controller: _controller,
decoration: InputDecoration(
prefixIcon: Icon(Icons.search),
hintText: 'Search for a place...',
suffixIcon: IconButton(
icon: Icon(Icons.clear),
onPressed: () {
_controller.clear();
setState(() {
_predictions = [];
});
},
),
),
onChanged: (value) {
_fetchPredictions(value);
},
),
SizedBox(height: 16.0),
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 selection of a prediction
print('Selected: ${prediction.description}');
// Optionally, you can use prediction.placeId to get details of the place
},
);
},
),
),
],
),
),
);
}
Future<void> _fetchPredictions(String query) async {
// Replace YOUR_API_KEY with your actual Google Places API key
String apiKey = 'YOUR_API_KEY';
PlaceSearchService placeSearchService = PlaceSearchService(apiKey: apiKey);
try {
AutocompletePredictionResponse response = await placeSearchService.getAutocompletePredictions(
input: query,
type: 'geocode', // You can specify other types like 'establishment'
components: null, // Optional, specify a location bias
sessionToken: null, // Optional, for session management
);
setState(() {
_predictions = response.predictions ?? [];
});
} catch (e) {
print('Error fetching predictions: $e');
}
}
}
在这个示例中:
- 我们创建了一个简单的Flutter应用,其中包含一个文本字段用于输入搜索查询。
- 当用户在文本字段中输入内容时,
_fetchPredictions
函数会被调用,该函数使用free_place_search
插件的PlaceSearchService
来获取自动完成的预测。 - 预测结果会显示在下方的列表中,用户可以点击列表项来处理选择。
请确保将YOUR_API_KEY
替换为你自己的Google Places API密钥。
这个示例演示了基本的地点搜索功能,你可以根据需求进一步扩展和优化。