NoClassDefFoundError when running app on real device but not when running on an emulator

Question

When I test my app on an emulator, (Nexus One API 22) it runs smoothly without fail. However, when I test the app on my own personal phone(Samsung Galaxy S5,Android version 5.0), it crashed with a NoClassDefFoundError. This error occurs at a part of the code where I am using an external library from a jar file.(jaudiotagger) Could it be that my own android phone does not have the jdk to support the library?

Answer 1

可能的问题是：您在模拟器（API 22）和带有android 5（API 21）的设备上未使用相同的API版本。

Answer 2

android API 22对应于android 5.1。然后您在手机中测试了该应用，即android 5.0。如果您的代码没有记错，也许是您所说的。