I'd like to offer an app to modify images. In order to have the user give an easy access to the that feature, it would be the easiest solution to just let him directly take a screenshot to have the source picture taken or respond to a screenshot event and access the latest screenshot.
Unfortunately it seems to be a problem, since an app or even a service from the app runs in background cannot easily react to events and I haven't found any solution that would go only little close to that kind of thing.
So my questions are (lets assume all necessary permissions are given from the user):
- Is there a possibility to register my app as kind of standard screenshot app (or additional screenshot app triggered by another key combination of the device) and how ;-)
- Can an app stay in a state to notice if a screenshot is taken and can access it?
- If not: Any ideas for an workaround other than let the user select a taken picture, which is rather kind of roundabout and annoying?
Any hints are very welcome! Thank you in advance!
(Since I had a misleading headline, I reposted this question - sorry!)