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