Basic demo xamarin forms app base - actual demo apps/functions will be built into or forked from this.
Custom Switch - Change Colour Based on On/Off State
See CustomControlPage example. I wrote a blog post about it.
Android implementation
Before implementation on Android. Note that you can't see the track of the Switch
when it's off ('false').
After adding some garish colours:
iOS implementation
Just proving the concept on iOS. Before...
...and after.
ListView Item Selection - Change its background colour:
See ListViewDemoPage example. I also wrote a short blog post about it.
(Apologies for the janky iOS gifs, they were done from the simulator running over a long-distance wifi connection)
iOS implementation
Before implementing on iOS. Note that you can't tell when an item is selected.
After implementing on iOS (change selected colour to teal)
Android implementation
Before implementing on Android (ugh orange, from the default theme)
After implementing on Android (better, teal)