我想使用flutter_local_notifications在我的应用中添加通知，但是一旦将插件添加到.yaml中，我的应用就不会再次运行。
以下是错误
```D8: Program type already present: android.support.v4.app.INotificationSideChannel
失败：构建失败，并出现异常。
出了什么问题： 任务'：app：transformDexArchiveWithExternalLibsDexMergerForDebug'的执行失败。
com.android.builder.dexing.DexArchiveMergerException：合并dex归档文件时出错：/Users/macbook/AndroidStudioProjects/restaurant/build/app/intermediates/transforms/dexBuilder/debug/2.jar，/ Users / macbook / AndroidStudioProjects /restaurant/build/app/intermediates/transforms/dexBuilder/debug/3.jar，/Users/macbook/AndroidStudioProjects/restaurant/build/app/intermediates/transforms/dexBuilder/debug/6.jar，/Users/macbook/AndroidStudioProjects /restaurant/build/app/intermediates/transforms/dexBuilder/debug/7.jar，/Users/macbook/AndroidStudioProjects/restaurant/build/app/intermediates/transforms/dexBuilder/debug/8.jar，/Users/macbook/AndroidStudioProjects /restaurant/build/app/intermediates/transforms/dexBuilder/debug/9.jar，/Users/macbook/AndroidStudioProjects/restaurant/build/app/intermediates/transforms/dexBuilder/debug/10.jar，/Users/macbook/AndroidStudioProjects /restaurant/build/app/intermediates/transforms/dexBuilder/debug/11.jar，/Users/macbook/AndroidStudioProjects/restaurant/bui ld / app / intermediates / transforms / dexBuilder / debug / 12.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 13.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 14.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 15.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 16.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 17.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 18.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 19.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 20.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transfo rms / dexBuilder / debug / 21.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 22.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 23.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 24.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 25.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 26.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 27.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 28.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 29.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 30.jar， /Users/macbook/AndroidStudioProjects/restaurant/build/app/intermediates/transforms/dexBuilder/debug/31.jar，/Users/macbook/AndroidStudioProjects/restaurant/build/app/intermediates/transforms/dexBuilder/debug/32.jar， /Users/macbook/AndroidStudioProjects/restaurant/build/app/intermediates/transforms/dexBuilder/debug/33.jar，/Users/macbook/AndroidStudioProjects/restaurant/build/app/intermediates/transforms/dexBuilder/debug/34.jar， /Users/macbook/AndroidStudioProjects/restaurant/build/app/intermediates/transforms/dexBuilder/debug/35.jar，/Users/macbook/AndroidStudioProjects/restaurant/build/app/intermediates/transforms/dexBuilder/debug/36.jar， /Users/macbook/AndroidStudioProjects/restaurant/build/app/intermediates/transforms/dexBuilder/debug/37.jar，/Users/macbook/AndroidStudioProjects/restaurant/build/app/intermediates/transforms/dexBuilder/debug/38.jar， /Users/macbook/AndroidStudioProjects/restaurant/build/app/intermediates/transforms/dexBuilder/debug/39.jar，/Users/macbook/AndroidStudi oProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 40.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 41.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 42.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 43.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 44.jar，/ Users / macbook / AndroidStudioProjects / restaurant / build / app / intermediates / transforms / dexBuilder / debug / 45.jar 在https://developer.android.com/studio/build/dependencies#duplicate_classes了解如何解决该问题。 程序类型已经存在：android.support.v4.app.INotificationSideChannel
尝试： 使用--stacktrace选项运行以获取堆栈跟踪。使用--info或--debug选项运行以获取更多日志输出。使用--scan运行以获取完整的见解。
在29秒内失败
Gradle失败可能是由于此Flutter应用程序中的AndroidX不兼容所致。 有关此问题及其解决方法的更多信息，请参见...。
完成错误：Gradle任务assembleDebug失败，退出代码为1```
谢谢。
答案 0 :(得分：0)
首先，您需要将所有软件包升级到与AndroidX兼容的版本。您可以从dart packages page上每个包的ChangeLog.md知道这一点。接下来，您需要在AndroidStudio中打开flutter的android项目，然后选择Refactor-> Migrate to AndroidX。稍等片刻，直到android studio重构您的项目。并从android studio运行重建项目。这样就可以了！