android - 升级 1.12 之前的 Android 项目后未找到实现

Question

我必须像这里一样升级 flutter android ' Upgrading pre 1.12 Android projects '

但是在我完成后我在 android 模拟器中运行应用程序它正在工作但是给我错误 No implementation found 几乎所有的包都给我这个问题

MissingPluginException(No implementation found for method init on channel plugins.flutter.io/google_sign_in)

MissingPluginException(No implementation found for method getDatabasesPath on channel com.tekartik.sqflite)

MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences)

我的 android 项目是 kotlin 所以在结构的第一步 Upgrading-pre-1.12 我删除 MainActivity.kt 而不是 MainActivity.java

我尝试了 flutter clean 和 flutter upgrade

ae24f1841..e43fd1c54 master -> origin/master Updating cf37c2cd0..27321ebba 24 files changed, 651 insertions(+), 218 deletions(-) Flutter is already up to date on channel stable Flutter 1.12.13+hotfix.5 • channel stable • https://github.com/flutter/flutter.git Framework • revision 27321ebbad (2 weeks ago) • 2019-12-10 18:15:01 -0800 Engine • revision 2994f7e1e6 Tools • Dart 2.7.0

我尝试关闭模拟器和vscode并卸载应用程序，但问题仍然存在

Answer 1

尝试重新安装所有包

flutter clean
flutter packages get