List fragment not appearing owing to No view found for ID error

Question

I\'m trying to launch a list fragment but it only seems to be working on tablets. When I run my app on phones the app crashes. Does anyone know how to resolve this issue? Code a

Answer 1

it's because you have this line

transaction.replace(R.id.master_container, newFragment);

and you don't have any layout inside activity_main.xml that has the same id as master_container