Error: This fragment inner class should be static [ValidFragment]

Question

why when I compile the project it works with no errors, but when I want to build the generated apk it gives me this error :

Error: This fragment inner class should be static [ValidFragment]

and how to fix it ?

Answer 1

Thats lint error, you are probably building with gradle, to disable aborting on errors, add:

lintOptions {
    abortOnError false
}

to build.gradle, or better fix problem in code. For more on this particular error read here: Fragment inner class should be static