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 get this error when my class isn't correctly defined in the manifest, typically because I haven't put in the correct name space as in:

as opposed to

Not sure why it would work for you on some devices and not others though.