Android: How can I get current screen image on canvas by running app in background using services

Question

I am new in Android app programming please some body help.. Thanx in advance

Answer 1

Any of your activities can draw itself to a Canvas -- there are plenty of answers on SO that cover that technique, such as: How to take a screenshot and share it programmatically

A service of yours could conceivably ask an activity of yours to draw itself to a Canvas, but it is unclear why the service exists.

A service of yours cannot have arbitrary other activities, ones that you did not write, take a screenshot in any form.