鸿蒙harmonyos next flutter混合开发之开发FFI plugin

helloxmg2024-10-07 9:23

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
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```
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});

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@override
State<MyApp> createState() => _MyAppState();

}

class _MyAppState extends State<MyApp> {
int sumResult = 0;
int sumAsyncResult = 0;

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@override
void initState() {
  super.initState();
  sumResult = summation.sum(1, 2);
   summation.sumAsync(3, 4).then((value) {
     sumAsyncResult = value;
     setState(() {

     });
   });
}

@override
Widget 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