Flutter数据搜索与自动补全插件dadata的使用

Flutter数据搜索与自动补全插件dadata的使用

Yet another DaData Suggestions 库。

实现的功能：

• 地址建议
• 反向地理编码
• 护照签发单位

完整示例Demo

以下是一个完整的示例代码，展示了如何在Flutter应用中使用dadata插件进行地址搜索与自动补全。

import 'package:flutter/material.dart';

import 'suggestions_screen.dart';

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

class MyApp extends StatelessWidget {
  // 这个widget是你的应用的根。
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key}) : super(key: key);

  [@override](/user/override)
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('DadataSuggestions Demo'),
      ),
      body: Center(
        child: Padding(
          padding: EdgeInsets.all(24),
          child: TextFormField(
            decoration: InputDecoration(
              hintText: "粘贴DaData API令牌并按回车键",
            ),
            onFieldSubmitted: (string) {
              Navigator.of(context).push(
                PageRouteBuilder(
                  opaque: false,
                  pageBuilder: (BuildContext context, a, b) {
                    return SuggestionsScreen(token: string);
                  },
                ),
              );
            },
          ),
        ),
      ),
    );
  }
}

SuggestionsScreen 类

SuggestionsScreen 是一个简单的页面，用于展示搜索结果。以下是该类的示例代码：

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

class SuggestionsScreen extends StatefulWidget {
  final String token;

  SuggestionsScreen({required this.token});

  [@override](/user/override)
  _SuggestionsScreenState createState() => _SuggestionsScreenState();
}

class _SuggestionsScreenState extends State<SuggestionsScreen> {
  List<String> suggestions = [];

  [@override](/user/override)
  void initState() {
    super.initState();
    fetchSuggestions(widget.token);
  }

  Future<void> fetchSuggestions(String token) async {
    var client = DaDataClient(token: token);
    var response = await client.suggest(SuggestionType.address, '');

    if (response != null && response.success) {
      setState(() {
        suggestions = response.suggestions.map((e) => e.value).toList();
      });
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('搜索结果'),
      ),
      body: ListView.builder(
        itemCount: suggestions.length,
        itemBuilder: (context, index) {
          return ListTile(
            title: Text(suggestions[index]),
          );
        },
      ),
    );
  }
}