有些时候并不须要加入lib库进行编译，比如在使用xposed的jar包时，仅仅须要在eclipse里Build Path-Add to Build Path就可以，假设作为lib库加入进去反而会出现异常。
下面是引用的原文：
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Next, make the XposedBridge API known to the project. You can downloadXposedBridgeApi-<version>.jar from
the first post of this XDA thread.
Copy it into a subfolder called lib.
Then right-click on it and select Build Path => Add to Build Path. The <version> from
the file name is the one you insert asxposedminversion in
the manifest.
--------------------------------------Make sure that the API classes are not included (but only referenced) in your compiled APK, otherwise you will get an
IllegalAccessError. Files in thelibs(with "s") folder are automatically included by Eclipse, so don't put the API file there.
在androidstudio相应的设置方法为：
F4打开project结构，选择Modules-当前项目-Dependencies-+-选择“Jar or directiories”。
选择jar包后，在“Scope”栏选择“Provided”，不要选择“Complie”。
