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• 创建FFI plugin summation，默认创建的FFI plugin是求两个数的和

flutter create --template=plugin_ffi summation --platforms=android,ios,ohos

• 创建my_application

flutter create --org com.example my_application

• 在my_application项目中文件pubspec.yaml引用summation

  summation:path: /Users/administrator/Desktop/workspace/summation

• my_application中调用summation

import 'package:flutter/material.dart';
import 'package:summation/summation.dart' as summation;void main() {runApp(const MyApp());
}class MyApp extends StatefulWidget {const MyApp({super.key});@overrideState<MyApp> createState() => _MyAppState();
}class _MyAppState extends State<MyApp> {int sumResult = 0;int sumAsyncResult = 0;@overridevoid initState() {super.initState();sumResult = summation.sum(1, 2);summation.sumAsync(3, 4).then((value) {sumAsyncResult = value;setState(() {});});}@overrideWidget build(BuildContext context) {const textStyle = TextStyle(fontSize: 25);const spacerSmall = SizedBox(height: 10);return MaterialApp(home: Scaffold(appBar: AppBar(title: const Text('my_application调用ffiplugin'),),body: SingleChildScrollView(child: Container(padding: const EdgeInsets.all(10),child: Column(children: [Text('同步求和sum(1, 2) = $sumResult',style: textStyle,textAlign: TextAlign.center,),spacerSmall,Text('异步求和sum(3, 4) = $sumAsyncResult',style: textStyle,textAlign: TextAlign.center,),],),),),),);}
}

• 效果展示