Android app ClassNotFoundException for main activity

Question

Most of the devices can run my app but I got this error report :

java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.company.app/com         


        

Answer 1

I had the same issue and the problem was a third party library that is using Android Support Library.

myproject/libs/android-support-v4.jar 
3rdpartylib/libs/android-support-v4.jar

When I updated the library with newer version, the support library was also updated - but not in my project. After that I could not launch the application with this error. After making both libraries to be the same (copy), it was ok.