android集成flutter

遇到的问题：

1.如果开发中调用flutter没问题，但是打包后打开flutter页面报错，可能是签名有问题。

在proguard-rules.pro添加

-keep class io.flutter.facade.**{*;}
-keep class io.flutter.plug.**{*;}
-keep class io.flutter.app.** { *; }
-keep class io.flutter.plugin.**  { *; }
-keep class io.flutter.util.**  { *; }
-keep class io.flutter.view.**  { *; }
-keep class io.flutter.**  { *; }
-keep class io.flutter.plugins.**  { *; }