How to access Button inside Activity from Fragment

Question

How to access Button inside Activity from Fragment. Actually I set myButton is disabled but when some of my radioButtons was clicked i want to set myButton enabled?

Answer 1

There are a few things you could try. The first one is to use getActivity().findViewByIt(id) to get the Button, which I think should work but it's not a good solution from the engineering side of things since your Fragment would make assumptions about the Activity layout that hosts it. The second would be to provide a callback interface as described here. Just call the callback method every time the checkbox changes state. This approach is better since the Fragment can be freely re-used by any activity that implements the callback interface. Last but not least, you should try to put the Button inside the fragment if at all possible.