The standard set of Android controls is rather poor. Of course, they can be redone, but the question torments me. Are there any ready-made sets of controls (like a component library in Delphi)? Google brought only this , I have not looked at it yet, but this is clearly not enough.
In general, I am interested in the element as in the video . There the guys control the robots from the tablet, to control the chassis. Something like a virtual joystick is used - a finger poked a chip on the screen, and you drag it within a circular area. Here I need it. If anyone saw - please.