android.content.res.Resources$NotFoundException: Resource ID #0x7f040019

Question

I do not know why I receive that exception in the line setContentView(R.layout.activity_main);. I have tried to CLEAN the project, REBUILD, RERUN, REEVERYTHING.

Answer 1

You need to create an activity_main.xml file without the v21 qualifier so the system can default back to that file whenever it's running on lower API emulators.

Your resources should end up being something like:

---

You can learn more about qualifiers in this link.