需要Flutter开发HarmonyOS原生plugin和so动态库打包的官方教程文档

import 'dart:async'; 
import 'package:flutter/material.dart'; 
import 'package:flutter/services.dart'; 
 
void main() { 
  runApp(const MyApp()); 
} 
 
class MyApp extends StatelessWidget { 
  const MyApp({super.key}); 
 
  @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({super.key, required this.title}); 
 
  final String title; 
 
  @override 
  State<MyHomePage> createState() => _MyHomePageState(); 
} 
 
class _MyHomePageState extends State<MyHomePage> { 
  // 注册通道名称。 
  // 一个应用中所使用的所有通道名称必须是唯一的；使用唯一的 域前缀 为通道名称添加前缀 
  static const platform = MethodChannel('samples.flutter.dev/battery'); 
  String _batteryLevel = 'Unknown battery level.'; 
 
  Future<void> _getBatteryLevel() async { 
  String batteryLevel; 
  try { 
  // 调用需要在平台中实现的方法 
  final result = await platform.invokeMethod<int>('getBatteryLevel'); 
  batteryLevel = 'Battery level at $result % .'; 
} on PlatformException catch (e) { 
  batteryLevel = "Failed to get battery level: '${e.message}'."; 
} 
 
setState(() { 
  _batteryLevel = batteryLevel; 
}); 
} 
 
// 以字符串形式显示电池状态、并包含一个用于刷新该值的按钮的小型用户界面。 
@override 
Widget build(BuildContext context) { 
  return Material( 
    child: Center( 
    child: Column( 
    mainAxisAlignment: MainAxisAlignment.spaceEvenly, 
  children: [ 
  ElevatedButton( 
    onPressed: _getBatteryLevel, 
  child: const Text('Get Battery Level'), 
  ), 
  Text(_batteryLevel), 
  ], 
  ), 
  ), 
  ); 
} 
}

import { FlutterAbility } from '@ohos/flutter_ohos' 
import { GeneratedPluginRegistrant } from '../plugins/GeneratedPluginRegistrant'; 
import FlutterEngine from '@ohos/flutter_ohos/src/main/ets/embedding/engine/FlutterEngine'; 
import BatteryPlugin from './BatteryPlugin'; 
 
export default class EntryAbility extends FlutterAbility { 
  configureFlutterEngine(flutterEngine: FlutterEngine) { 
    super.configureFlutterEngine(flutterEngine) 
    GeneratedPluginRegistrant.registerWith(flutterEngine) 
    // 注册插件 
    this.addPlugin(new BatteryPlugin()) 
  } 
}

import { FlutterPlugin, Log, Any, MethodChannel, MethodCall } from '@ohos/flutter_ohos'; 
import { FlutterPluginBinding } from '@ohos/flutter_ohos/src/main/ets/embedding/engine/plugins/FlutterPlugin'; 
import { batteryInfo } from '@kit.BasicServicesKit'; 
import { MethodResult } from '@ohos/flutter_ohos/src/main/ets/plugin/common/MethodChannel'; 
 
const TAG = "BatteryPluginTag"; 
const CHANNEL = "samples.flutter.dev/battery"; 
 
export default class BatteryPlugin implements FlutterPlugin { 
  onAttachedToEngine(binding: FlutterPluginBinding): void { 
    new MethodChannel(binding.getBinaryMessenger(), CHANNEL).setMethodCallHandler({ 
      onMethodCall(call: MethodCall, result: MethodResult) { 
        if (call.method == "getBatteryLevel") { 
          let level: number = getBatteryLevel(); 
          Log.i(TAG, "level=" + level); 
          let wrapped: Map<String, Any> = new Map<String, Any>(); 
          if (level >= 0) { 
            result.success(level); 
          } else { 
            Log.i(TAG, "getBatteryLevel else"); 
            wrapped.set("UNAVAILABLE", "Battery level not available."); 
            result.error("UNAVAILABLE", "Battery level not available.", null) 
          } 
          Log.i(TAG, "getBatteryLevel finish"); 
        } 
      } 
    }) 
  } 
 
  onDetachedFromEngine(binding: FlutterPluginBinding): void { 
    Log.i(TAG, "onDetachedFromEngine"); 
  } 
 
  getUniqueClassName(): string { 
    return "BatteryPlugin"; 
  } 
} 
 
function getBatteryLevel(): number { 
  return batteryInfo.batterySOC; 
}

flutter run -d $DEVICE --local-engine=$ENGINE_DEBUG --debug