Android Question Animation : floating effect

[TelKel81]

I'm looking for a formula (or animation library?) that can simulate a "idle floating / hovering" effect. Like a drone that slowly/smoothly goes up and down a bit.

I tried the NineOldAndroid library but haven't found an interpolation setting that mimics what I describe.

 

[Erel]

Check the code of B4XLoadingIndicator inside XUI Views.b4xlib (=zip file).

It creates all kinds of animations and you can use similar code to create other types.