I read about support.v4
lib that allows android backward compatibility.
So IIUC, when there is an ambiguity - it's always best practice to import the lib from android.support.v4 ...
right?
Yeah, it's wise but not always needed.
I this case Pair
is API 5 and quite usefull class so it was added to v4
library.
Another example are Fragments
. If you want to use ViewPager
with Fragments
most probably you need Fragments
from v4
as ViewPager
is from v4
as well...
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