首先建议阅读 native 使用部分 native_usage.md
总的来说,这属于flutter方面的任务
参考: https://flutter.dev/docs/development/platform-integration/platform-channels
另外,可以参考我们写的eth flutter 多签冷热钱包demo: https://github.com/dabankio/wallet-sdk-demo
额外的,作为参考的flutter lib: https://github.com/dabankio/flutter-wallet-core