History of 2016-05-10 Preserving the drawing during screen rotation

04:30 UTC Revision 1 . . . . Marcin BorkowskiA rather annoying “feature” of Android is the fact that screen rotation causes recreating the current activity from scratch. While this is quite reasonable, it has an undesired side effect: most data are lost. (What is left is the state of widgets having an id.) In Logeox, this is not what I would like to have: if I rotate my phone (and that might happen by accident!), all my drawings are erased. The problem is: what do I do with it? Quite surprisingly, the solution seems far from obvious. After about an hour of reading and experiments, here’s what I learned and did.