我正在尝试在 android 项目中使用 KSoap 库来处理 web 服务，但我从一开始就失败了。我导入这个 jar并将其添加到构建路径中。一切似乎都很好，但是当我构建项目时，我得到了这个错误（当使用不同版本的 ksoap 时，还有其他类似的错误）：
[2012-01-17 13:22:27 - TestWSApp] Dx
UNEXPECTED TOP-LEVEL EXCEPTION:
java.lang.IllegalArgumentException: already added: Lorg/ksoap2/transport/AndroidHttpTransport;
at com.android.dx.dex.file.ClassDefsSection.add(ClassDefsSection.java:123)
at com.android.dx.dex.file.DexFile.add(DexFile.java:163)
at com.android.dx.command.dexer.Main.processClass(Main.java:486)
at com.android.dx.command.dexer.Main.processFileBytes(Main.java:455)
at com.android.dx.command.dexer.Main.access$400(Main.java:67)
at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:394)
at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:245)
at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:131)
at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:109)
at com.android.dx.command.dexer.Main.processOne(Main.java:418)
at com.android.dx.command.dexer.Main.processAllFiles(Main.java:329)
at com.android.dx.command.dexer.Main.run(Main.java:206)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.android.ide.eclipse.adt.internal.build.DexWrapper.run(DexWrapper.java:179)
at com.android.ide.eclipse.adt.internal.build.BuildHelper.executeDx(BuildHelper.java:745)
at com.android.ide.eclipse.adt.internal.build.builders.PostCompilerBuilder.build(PostCompilerBuilder.java:634)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:728)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:321)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:396)
at org.eclipse.core.internal.resources.Project$1.run(Project.java:618)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2344)
at org.eclipse.core.internal.resources.Project.internalBuild(Project.java:597)
at org.eclipse.core.internal.resources.Project.build(Project.java:124)
at com.android.ide.eclipse.adt.internal.project.ProjectHelper.doFullIncrementalDebugBuild(ProjectHelper.java:961)
at com.android.ide.eclipse.adt.internal.launch.LaunchConfigDelegate.launch(LaunchConfigDelegate.java:146)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:854)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:703)
at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:928)
at org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin.java:1132)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
[2012-01-17 14:06:52 - ShapeSalesForceApp] Dx 1 错误；中止 [2012-01-17 14:06:52 - ShapeSalesForceApp] 转换为 Dalvik 格式失败，错误 1
有一些文章说我必须重建 maven 项目并创建一个新 jar，因为有一些错误。
我只是希望有人知道 ksoap 的一个好的工作版本。我使用的jdk版本应该重要吗？我认为不是……但现在我正试图找出问题的根源，然后找出解决方案。你能帮忙吗？无论如何谢谢:)