【问题标题】:Issue using gson with Android in Eclipse在 Eclipse 中将 gson 与 Android 一起使用的问题
【发布时间】:2010-05-03 16:46:34
【问题描述】:

将 gson 1.4 添加到我的 Android 项目的 java 构建路径时,我收到如下所示的错误。

有人可以帮忙吗?

谢谢

 [2010-05-03 18:42:07 - Atable] 
 UNEXPECTED TOP-LEVEL EXCEPTION:
 java.lang.IllegalArgumentException: already added: Lcom/google/gson/annotations/Expose;
 [2010-05-03 18:42:07 - Atable]     at com.android.dx.dex.file.ClassDefsSection.add(ClassDefsSection.java:123)
 [2010-05-03 18:42:07 - Atable]     at com.android.dx.dex.file.DexFile.add(DexFile.java:143)
 [2010-05-03 18:42:07 - Atable]     at com.android.dx.command.dexer.Main.processClass(Main.java:299)
 [2010-05-03 18:42:07 - Atable]     at com.android.dx.command.dexer.Main.processFileBytes(Main.java:276)
 [2010-05-03 18:42:07 - Atable]     at com.android.dx.command.dexer.Main.access$100(Main.java:56)
 [2010-05-03 18:42:07 - Atable]     at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:228)
 [2010-05-03 18:42:07 - Atable]     at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:245)
 [2010-05-03 18:42:07 - Atable]     at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:130)
 [2010-05-03 18:42:07 - Atable]     at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:108)
 [2010-05-03 18:42:07 - Atable]     at com.android.dx.command.dexer.Main.processOne(Main.java:245)
 [2010-05-03 18:42:07 - Atable]     at com.android.dx.command.dexer.Main.processAllFiles(Main.java:183)
 [2010-05-03 18:42:07 - Atable]     at com.android.dx.command.dexer.Main.run(Main.java:139)
 [2010-05-03 18:42:07 - Atable]     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 [2010-05-03 18:42:07 - Atable]     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 [2010-05-03 18:42:07 - Atable]     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 [2010-05-03 18:42:07 - Atable]     at java.lang.reflect.Method.invoke(Method.java:597)
 [2010-05-03 18:42:07 - Atable]     at com.android.ide.eclipse.adt.internal.sdk.DexWrapper.run(Unknown Source)
 [2010-05-03 18:42:07 - Atable]     at com.android.ide.eclipse.adt.internal.build.ApkBuilder.executeDx(Unknown Source)
 [2010-05-03 18:42:07 - Atable]     at com.android.ide.eclipse.adt.internal.build.ApkBuilder.build(Unknown Source)
 [2010-05-03 18:42:07 - Atable]     at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:627)
 [2010-05-03 18:42:07 - Atable]     at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
 [2010-05-03 18:42:07 - Atable]     at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:170)
 [2010-05-03 18:42:07 - Atable]     at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:201)
 [2010-05-03 18:42:07 - Atable]     at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:253)
 [2010-05-03 18:42:07 - Atable]     at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
 [2010-05-03 18:42:07 - Atable]     at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:256)
 [2010-05-03 18:42:07 - Atable]     at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:309)
 [2010-05-03 18:42:07 - Atable]     at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:341)
 [2010-05-03 18:42:07 - Atable]     at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:140)
 [2010-05-03 18:42:07 - Atable]     at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:238)
 [2010-05-03 18:42:07 - Atable]     at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
 [2010-05-03 18:42:07 - Atable] 1 error; aborting
 [2010-05-03 18:42:07 - Atable] Conversion to Dalvik format failed with error 1

【问题讨论】:

  • 当您的意思是添加到构建路径时,您是指“添加外部 jar”还是“添加 jar”?我总是使用“添加外部 jar”。
  • 我清理了项目并使用“添加外部 jar”,现在它可以工作了......谢谢
  • 发布答案并接受它,还是删除这个问题有意义吗?

标签: android eclipse gson


【解决方案1】:

如果其他人正在寻找另一个可能的解决方法: 如果您使用的是 Eclipse,则必须确保 lib 文件夹未(!)声明为 src 文件夹。相反,它只需要一个数据文件夹,您可以通过上下文菜单“添加到构建路径”自动导入库。

【讨论】:

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