I just made gloves like that for a x-mas gift.
This is what they look like when you wear them:
You can retreat the fingers into the glove, of course.
All I did was leave a horizontal gap of a little less then half the stitches of the finger by casting off in one round and casting back on (knit cast on) in the next.
My glove pattern and design are improvised because I always do that, really. But you can practically use any glove that is knit top down or bottom up (just not sideways ).
If you need your finger for camera handling and text messages, then I guess, the hole could be partway up the finger (less dangleing). My gloves were made for hunting and therefore the trigger needs to be pulled. (the thumb was because of my dad's smart phone, though).