not recognizing R.Id.activity_main

[stevedas]

i AM TRYING T MAKE THE BACKGROUND COLOR ALTERNATE FROM RED TO BLUE AFTER A BUTTON IS PUSHED. I am not sure wht the program does not recognize "activity_main" in my program. Please help !

 

[stevedas]

i AM TRYING T MAKE THE BACKGROUND COLOR ALTERNATE FROM RED TO BLUE AFTER A BUTTON IS PUSHED. I am not sure wht the program does not recognize "activity_main" in my program. Please help !

View attachment 126040

THIS IS THE NEW SCREENSHOT I MADE SOME CORRECTIONS:

THANK YOU in advance

 

[kfrajer]

Check this: https://stackoverflow.com/questions/16636609/android-findviewbyid-for-a-parent-layout

Kf