Callback on tap

Hi, can we have a callback on tap on an empty space of the view?
This callback should pass back time corresponding the tapped point.
Thanks

Start by locating the calendar day view's tap-handling entry point in the Java Android library and determine how empty-space taps are represented. Define the callback's time value and verify that tapping empty space invokes it, but the issue does not name a file or test to run.

Written by the indexing model from the issue text.