前言:从 SDK 级别 16 开始,Android 有一个内置的 Zeroconf 实现。除非担心青铜时代的兼容性,否则不要再使用 jmDNS,NsdManager
而是使用。
序言 #2:NsdManager 的早期版本充满了故障,请参阅 SO question getSystemService(Context.NSD_SERVICE) freezes the 5.0 emulator和链接的错误记录。
我已将 jmDNS 3.4.1 添加到我的 Android 项目中。将 JAR 复制到 下lib
,然后在“Java BuildPath”/Libraries 下添加参考。
现在我的构建失败并在控制台中显示以下消息:
[2012-07-27 22:59:07 - Yarxi] Dx
UNEXPECTED TOP-LEVEL EXCEPTION:
java.lang.IllegalArgumentException: already added: Lcom/strangeberry/jmdns/tools/Browser$1;
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:180)
at com.android.ide.eclipse.adt.internal.build.BuildHelper.executeDx(BuildHelper.java:703)
at com.android.ide.eclipse.adt.internal.build.builders.PostCompilerBuilder.build(PostCompilerBuilder.java:577)
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:1000)
at com.android.ide.eclipse.adt.internal.launch.LaunchConfigDelegate.launch(LaunchConfigDelegate.java:147)
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:937)
at org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin.java:1141)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
[2012-07-27 22:59:10 - Yarxi] Dx 1 error; aborting
[2012-07-27 22:59:10 - Yarxi] Conversion to Dalvik format failed with error 1
当我查看 Package Explorer 中 Referenced Libraries 下的 JAR 内容时,我看到 jmdns.jar 中每个包下的每个类都列出了两次。JmDNS.class 的两个副本,JmmDNS.class 的两个副本,依此类推。
知道这个罐子有什么问题吗?我在项目中使用了其他 jars,它们都没有这样的行为。尝试清洁几次,删除并重新添加 JAR - 效果相同。
可能值得注意的是,这是一个库项目,当我构建引用该库的应用程序时会弹出错误。