解决Linux中使用ApkTool遇到问题

I: Baksmaling...
I: Loading resource table...
I: Loaded.
W: Could not decode attr value, using undecoded value instead: ns=android, name=
versionCode, value=0x0000000a
W: Could not decode attr value, using undecoded value instead: ns=android, name=
versionName, value=0x00000011
Exception in thread "main" java.lang.NullPointerException
        at java.io.Writer.write(Unknown Source)
        at brut.androlib.res.util.ExtMXSerializer.writeAttributeValue(ExtMXSeria
lizer.java:38)
        at org.xmlpull.mxp1_serializer.MXSerializer.attribute(MXSerializer.java:
673)
        at org.xmlpull.v1.wrapper.classic.XmlSerializerDelegate.attribute(XmlSer
ializerDelegate.java:106)
        at org.xmlpull.v1.wrapper.classic.StaticXmlSerializerWrapper.writeStartT
ag(StaticXmlSerializerWrapper.java:267)
        at org.xmlpull.v1.wrapper.classic.StaticXmlSerializerWrapper.event(Stati
cXmlSerializerWrapper.java:211)
        at brut.androlib.res.decoder.XmlPullStreamDecoder.decode(XmlPullStreamDe
coder.java:46)
        at brut.androlib.res.decoder.ResStreamDecoderContainer.decode(ResStreamD
ecoderContainer.java:34)
        at brut.androlib.res.decoder.ResFileDecoder.decode(ResFileDecoder.java:1
00)
        at brut.androlib.res.AndrolibResources.decode(AndrolibResources.java:114
)
        at brut.androlib.Androlib.decodeResourcesFull(Androlib.java:93)
        at brut.androlib.ApkDecoder.decode(ApkDecoder.java:98)
        at brut.apktool.Main.cmdDecode(Main.java:120)
        at brut.apktool.Main.main(Main.java:57)