Flutter 与原生交互总结

import 'package:flutter/services.dart';
import 'package:flutter/material.dart';
 
void main() => runApp(MyApp());
 
class MyApp extends StatelessWidget {
  // 此处省略其他代码...
 
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        // 其他主题设置...
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}
 
class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
 
  final String title;
 
  @override
  _MyHomePageState createState() => _MyHomePageState();
}
 
class _MyHomePageState extends State<MyHomePage> {
  static const platform = MethodChannel('samples.flutter.dev/battery');
  String _batteryLevel = 'Unknown battery level.';
 
  Future<void> _getBatteryLevel() async {
    String batteryLevel;
    try {
      final int result = await platform.invokeMethod('getBatteryLevel');
      batteryLevel = 'Battery level at $result%.';
    } on PlatformException catch (e) {
      batteryLevel = "Failed to get battery level: '${e.message}'.";
    }
 
    setState(() {
      _batteryLevel = batteryLevel;
    });
  }
 
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'Battery level: $_batteryLevel\n',
              style: TextStyle(fontSize: 24),
            ),
            RaisedButton(
              child: Text('Get Battery Level'),
              onPressed: _getBatteryLevel,
            ),
          ],
        ),
      ),
    );
  }
}

这个代码示例展示了如何在Flutter中创建一个与原生平台交互的应用。它定义了一个方法通道来与原生代码通信，并展示了如何从原生代码获取电池电量信息，并在Flutter界面上显示。这个示例对于学习如何在Flutter和原生之间进行通信是非常有帮助的。