Red screen

Just show entire red screen without any toolbars, with maximum brightness. Useful for signaling some emergency.

Features:

• Hiding everything else (immersive mode)
• Setting brightness to maximum
• Showing the application atop of lock screen (when activated from some gesture, etc.)
• Overridable colour (as intent parameter)

You can trigger it from console with am start -n org.vi_server.red_screen/org.vi_server.red_screen.RedScreenActivity command. For overriding colour use parameter like -e colour yellow.

Exit with "Back" button, not with "Home" (due to brightness wakelock).

See Github releases for pre-built redscreen.apk signed with a debugging key.

Implemented by Vitaly "_Vi" Shukela in 2015. License: MIT.