android打包引用第三方jar出現的錯誤

今天終于完成了近一個月的app開發工作，對程式進行混淆導出簽名apk包時，卻出現了如下的錯誤：

proguard returned with error code 1. see console

note: there were 4 duplicate class definitions.

warning: library class android.content.res.xmlresourceparser extends or implements program class org.xmlpull.v1.xmlpullparser

warning: library class android.content.intent depends on program class org.xmlpull.v1.xmlpullparser

。。。

心裡想着，真是好事多磨呀！

那就趕緊問度娘呀，終于在一位網友那裡找到了答案。

對于android導入了第三方jar包時，proguard混淆腳本會出現錯誤，而出現上面的錯誤是因為程式中引入了第三方jar包[ksoap2-android-assembly-2.6.5-jar-with-dependencies.jar]，二話不說，立馬行動：

在proguard-project.txt中增加了

-ignorewarnings

-libraryjars lib/ksoap2-android-assembly-2.5.4-jar-with-dependencies.jar （jar包路徑）

即在檔案中增加了如下紅色的兩行：

-dontusemixedcaseclassnames

-dontskipnonpubliclibraryclasses

-verbose

# optimization is turned off by default. dex does not like code run

# through the proguard optimize and preverify steps (and performs some

# of these optimizations on its own).

-dontoptimize

#-dontoptimize

# note that if you want to enable optimization, you cannot just

# include optimization flags in your own project configuration file;

# instead you will need to point to the

# "proguard-android-optimize.txt" file instead of this one from your

# project.properties file.

-libraryjars libs/ksoap2-android-assembly-2.6.5-jar-with-dependencies.jar 

-keepattributes *annotation*

-keep public class com.google.vending.licensing.ilicensingservice

-keep public class com.android.vending.licensing.ilicensingservice