在颤振应用程序中添加 image_picker 插件后，Gradle Build 失败答案

【问题标题】：Gradle Build failing after adding image_picker plugin in flutter app在颤振应用程序中添加 image_picker 插件后，Gradle Build 失败
【发布时间】：2019-07-11 11:15:58
【问题描述】：

当我运行应用程序而不添加图像选择器作为依赖项时，它工作正常。但是当我添加插件并运行时，它给了我 gradle build failed 错误。

Resolving dependencies...                                    5.0s
Gradle task 'assembleDebug'...
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
D8: Program type already present: android.support.v4.app.INotificationSideChannel

         *********************************************************
WARNING: This version of image_picker will break your Android build if it or its dependencies aren't compatible with AndroidX.

         This warning prints for all Android build failures. The real root cause of the error may be unrelated.
         *********************************************************
FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:transformDexArchiveWithExternalLibsDexMergerForDebug'.
> com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\142.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\118.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\94.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\124.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\88.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\136.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\157.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\103.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\163.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\151.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\127.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\100.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\166.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\139.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\97.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\115.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\160.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\169.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\106.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\154.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\148.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\112.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\172.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\133.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\109.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\91.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\121.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\130.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\145.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\27.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\52.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\18.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\43.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\19.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\51.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\60.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\36.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\34.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\42.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\28.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\50.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\33.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\37.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\2.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\9.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\25.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\45.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\32.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\38.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\39.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\44.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\57.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\26.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\8.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\31.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\30.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\56.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\13.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\14.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\21.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\49.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\7.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\12.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\15.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\55.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\58.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\6.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\20.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\46.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\11.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\59.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\24.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\29.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\54.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\16.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\41.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\5.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\10.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\3.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\17.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\23.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\47.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\40.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\53.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\35.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\4.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\48.jar, D:\fluuter_projects\motor_app_demo\build\app\intermediates\transforms\dexBuilder\debug\22.jar
  Learn how to resolve the issue at https://developer.android.com/studio/build/dependencies#duplicate_classes.
  Program type already present: android.support.v4.app.INotificationSideChannel

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 22s
Gradle task 'assembleDebug'... Done                         23.7s
Gradle task assembleDebug failed with exit code 1

【问题讨论】：

标签： android gradle dart flutter build.gradle

【解决方案1】：

由于 Android X 支持... 避免 AndroidX 并回滚到旧版本的简单解决方案依赖项： image_picker: 0.4.12+1

或

将 Flutter 应用迁移到 AndroidX 将您的 Flutter 应用导入 Android Studio，以便 IDE 可以按照在具有完整 IDE 支持的 Android Studio 中编辑 Android 代码中的步骤解析 Android 代码。

按照迁移到 AndroidX 的说明进行操作。

https://flutter.io/docs/development/packages-and-plugins/androidx-compatibility

https://developer.android.com/jetpack/androidx/migrate

【讨论】：

AndroidX 兼容性文档很有帮助。