Cannot find R.layout.activity_main

Question

I was trying to work out with multiple layout using some online tutorials. The thing is my program was building and compiling correctly as long as there was only one XML fil

Answer 1

I had a similar problem.
It happened suddenly, after deleting some pictures from res. drawable. I did two things.

• First I checked all my images in the drawable folder,if they all have preview. one of mine was damaged.
• Secondly, I closed all opened android studio and emulator. After that every things worked fine.