Button in custom Android Toast?
Solution 1:
A toast can not be clicked. It is not possible to capture a click inside a toast message. You will need to build a dialog for that. Look at Creating Dialogs for more info.
The API on the Toast class state that a toast will never receive the focus and because a toast is not a view there is no onClick message. I would assume that therefore childs of a Toast can not be clicked as well.
Solution 2:
A toast cant contain a button. Except that the gmail app and the gallery app in jelly beans have a semi toast that contains a button, here is how Google did it
https://gist.github.com/benvd/4090998
I guess this answers your question.