Hello, Moderators, If this is the wrong section for this, please feel free to move it.
This is not an Arduino problem per se, as the arduino IDE works fine with U8g2, and my OLED display works fine, but I like to load sketches to my Android tablet for transport to the field, and with ArduinoDroid, I can make small parameter changes, compile and upload right there onsite.
Once I discovered that LCDs really do have a liquid component that doesn't appreciate sub-zero temps (Duh!) I switched to an OLED display, necessitating the use of the U8g2 library instead of the LiquidCrystali2c library. Everything was fine until I tried to compile the sketch on the tablet.
I'll post the error messages if anyone is interested, but since this is a problem specific to the app, I perfectly understand if no one is interested.
I have filed a bug report with Mr. Smirnov, the developer, but have not heard back from him, and probably won't anytime soon, LOL.
I did not bother Oliver, because the library works fine on the arduino IDE.