我正在使用image_picker 0.5.2包上传图片，将依赖项添加到项目后，我无法构建我的项目，但出现了下面提到的异常。请帮帮我。
D8: Program type already present: android.support.v4.os.ResultReceiver$MyResultReceiver
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: /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/2.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/3.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/4.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/5.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/6.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/7.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/8.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/9.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/10.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/11.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/12.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/13.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/14.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/15.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/16.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/17.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/18.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/19.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/20.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/21.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/22.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/23.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/24.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/25.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/26.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/27.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/28.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/29.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/30.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/31.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/32.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/33.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/34.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/35.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/36.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/37.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/38.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/39.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/40.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/41.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/42.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/43.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/44.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/45.jar, /Users/harshavardhan/Workspace/cargill_flutter/build/app/intermediates/transforms/dexBuilder/debug/46.jar
Learn how to resolve the issue at https://developer.android.com/studio/build/dependencies#duplicate_classes.
Program type already present: android.support.v4.os.ResultReceiver$MyResultReceiver
* 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
*******************************************************************************************
The Gradle failure may have been because of AndroidX incompatibilities in this Flutter app.
*******************************************************************************************
Gradle task assembleDebug failed with exit code 1
Exited (sigterm)
答案 0 :(得分：1)
Gradle失败可能是由于此Flutter应用程序中的AndroidX不兼容所致。
如您的跟踪中所述，此错误是由于您的应用中的AndroidX不兼容所致。 image_picker插件已从版本 0.5.0 迁移到最新的AndroidX支持库。
要使您的应用正常运行，您可以migrate your app to AndroidX，或者如果您的应用依赖于尚未迁移到AndroidX的任何其他软件包，则可以将image_picker插件版本锁定为 0.4.12 +1 ，它使用了较早的支持库。
将此添加到您的pubspec.yaml中以使用此插件的特定版本-
image_picker: 0.4.12+1
有关此here的更多信息。
更新
您可以查看this answer以获得有关为何迁移到AndroidX的解释。另外，该官员blog解释了有关AndroidX的所有内容。
希望这会有所帮助！
答案 1 :(得分：0)
您需要迁移到AndroidX才能使该库的特定版本正常工作。 请按照此link中的步骤进行迁移。
答案 2 :(得分：0)
this，以及当您要使用
File _image;
final images=ImagePicker();
Future getImage()async {
var Image=await images.getImage(source: ImageSource.camera);
setState(() {
_image=File(Image.path);
}); }
存储了_image路径：
image当您最初运行程序时，_image变量不包含图像路径，实际上该路径为空或空，并且出现错误，所以这样做
Container(
height: 180,
width: 180,
child: ClipRRect(child: _image==null?Center(child: Text('Please Upload a pic'),):Image.file(_image,fit: BoxFit.fill,),),
它告诉flutter路径是否为空且未选择显示我的手动消息
选择图片文件File（Image.path）时，您将看到请在容器中上传图片；会生成一条合适的路径，您的图片会出现，谢谢