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Is anyone else getting a certificate error? also.. tangentially I have been experimenting with directly exposing photo paper with my phone screen, and pulling

Is anyone else getting a certificate error? also.. tangentially I have been experimenting with directly exposing photo paper with my phone screen, and pulling it away in a fraction of a second. Do any android devs out there know if it would be feasible for me to whip up an app that flashed the screen including backlight on and off to show an image for a fraction of a second at a specific brightness?

beardyw 5y ago
My guess would be a 'display over other apps' app which swapped from black to transparent and back might be more responsive than trying to use the backlight. Just a guess though.
theelous3 5y ago
Software isn't going to know the actual candela output from random screens, or individual devices. You'd have to standardise the hardware or have a v good db of models and light etc.
- _def 5y ago
  Or some way to calibrate it I guess