Android：使用Ant Release构建apk的问题

Android: Problems building apk with Ant Release

我在eclipse中构建我的应用程序没有问题，但是一旦我尝试通过ant进行，它就不会构建。我用过"android update project -p"。生成build build.xml和proguard.cfg文件。我试过"ant compile"，它也很好。该应用程序包括一个Android库，如果重要的话有外部库。这里的任何人都是在我尝试进行"蚂蚁释放"时打印出来的错误，

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UNEXPECTED TOP-LEVEL EXCEPTION:
com.android.dx.util.ExceptionWithContext
at com.android.dx.util.ExceptionWithContext.withContext(ExceptionWithContext.java:46)
at com.android.dx.dex.cf.CfTranslator.processMethods(CfTranslator.java:340)
at com.android.dx.dex.cf.CfTranslator.translate0(CfTranslator.java:131)
at com.android.dx.dex.cf.CfTranslator.translate(CfTranslator.java:85)
at com.android.dx.command.dexer.Main.processClass(Main.java:369)
at com.android.dx.command.dexer.Main.processFileBytes(Main.java:346)
at com.android.dx.command.dexer.Main.access$400(Main.java:59)
at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:294)
at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:134)
at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:190)
at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:122)
at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:190)
at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:122)
at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:190)
at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:122)
at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:190)
at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:122)
at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:190)
at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:122)
at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:108)
at com.android.dx.command.dexer.Main.processOne(Main.java:313)
at com.android.dx.command.dexer.Main.processAllFiles(Main.java:233)
at com.android.dx.command.dexer.Main.run(Main.java:185)
at com.android.dx.command.dexer.Main.main(Main.java:166)
at com.android.dx.command.Main.main(Main.java:90)
Caused by: java.lang.NullPointerException
at com.android.dx.cf.code.ConcreteMethod.<init>(ConcreteMethod.java:84)
at com.android.dx.dex.cf.CfTranslator.processMethods(CfTranslator.java:243)
... 23 more

我此刻非常困惑所以希望有人可以解释一下。