invalid resource directory name: f:\tang\res/drawable-xhdpi
Exception in thread "main" brut.androlib.AndrolibException: brut.androlib.Androl
ibException: brut.common.BrutException: could not exec command: [aapt, p, --min-
sdk-version, 8, --target-sdk-version, 15, -F, C:\Users\ADMINI~1\AppData\Local\Te
mp\APKTOOL15587.tmp, -0, arsc, -I, C:\Users\Administrator\apktool\framework\1.ap
k, -S, f:\tang\res, -M, f:\tang\AndroidManifest.xml]
        at brut.androlib.Androlib.buildResourcesFull(Androlib.java:358)
        at brut.androlib.Androlib.buildResources(Androlib.java:283)
        at brut.androlib.Androlib.build(Androlib.java:206)
        at brut.androlib.Androlib.build(Androlib.java:176)
        at brut.apktool.Main.cmdBuild(Main.java:228)
        at brut.apktool.Main.main(Main.java:79)
Caused by: brut.androlib.AndrolibException: brut.common.BrutException: could not
 exec command: [aapt, p, --min-sdk-version, 8, --target-sdk-version, 15, -F, C:\
Users\ADMINI~1\AppData\Local\Temp\APKTOOL15587.tmp, -0, arsc, -I, C:\Users\Admin
istrator\apktool\framework\1.apk, -S, f:\tang\res, -M, f:\tang\AndroidManifest.x
ml]
        at brut.androlib.res.AndrolibResources.aaptPackage(AndrolibResources.jav
a:357)
        at brut.androlib.Androlib.buildResourcesFull(Androlib.java:336)
        ... 5 more
重复签名apk的话，需要把apk包里面的MATE-INF文件夹删除掉。

的确是删除了MATE-INF这个文件夹就可以签名了