如何将flutter_local_notifications添加到我的应用程序中？

Question

我想用flutter_local_notifications在我的应用程序中添加通知，但是一旦我将插件添加到我的.yaml中，我的应用程序就不会再运行了。下面是错误

```D8: Program type already present: android.support.v4.app.INotificationSideChannel

失败:生成失败，出现异常。

• 出了什么问题:任务':app:transformDexArchiveWithExternalLibsDexMergerForDebug'.的执行失败 合并dex档案时发生com.android.builder.dexing.DexArchiveMergerException:错误: /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/build/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/transforms/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/AndroidStudioProjects/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学习如何在类上解决这个问题。已存在的程序类型: android.support.v4.app.INotificationSideChannel
• 尝试:使用--stacktrace选项运行以获得堆栈跟踪。使用--info或-调试选项运行以获得更多日志输出。用扫描来获得完整的洞察力。
• 在https://help.gradle.org获得更多帮助

生成在29s中失败

Gradle的失败可能是因为这个颤振应用程序中的AndroidX不兼容。你看..。有关此问题和如何解决问题的更多信息。

完成错误:分级任务assembleDebug失败，退出代码1‘

谢谢。

Answer 1

首先，您需要将所有必须的包升级到与AndroidX兼容的版本。您可以从ChangeLog.md上的每个包的dart软件包页面中知道这一点。接下来，您需要在AndroidStudio中打开颤振的android项目，然后选择Refactor->Migrate to AndroidX。请稍候，直到android重新调整您的项目。以及android工作室的run重建项目。那就行了！