无法执行dex:多个dex文件定义Lcom / nineoldandroids / animation / Animator $ AnimatorListener;

我在构buildapk时反复出错。 做了基本的东西,如清理,更新和重新启动日食,但仍然没有得到解决。 这里是错误日志。

com.android.dx.util.DexException: Multiple dex files define Lcom/nineoldandroids/animation/Animator$AnimatorListener; at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:592) at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:550) at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:531) at com.android.dx.merge.DexMerger.mergeDexBuffers(DexMerger.java:168) at com.android.dx.merge.DexMerger.merge(DexMerger.java:186) at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:300) at com.android.dx.command.dexer.Main.run(Main.java:232) at sun.reflect.GeneratedMethodAccessor29.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:187) at com.android.ide.eclipse.adt.internal.build.BuildHelper.executeDx(BuildHelper.java:813) at com.android.ide.eclipse.adt.internal.build.builders.PostCompilerBuilder.build(PostCompilerBuilder.java:597) at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:726) 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:1116) at com.android.ide.eclipse.adt.internal.launch.LaunchConfigDelegate.launch(LaunchConfigDelegate.java:147) at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:855) at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:704) at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:1047) at org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin.java:1251) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53) 

我认为案例是,直接或间接引用的jar子必须是唯一的。