How to make it possible to select other keys when a key is pressed in the keyboard?

Question

Android

tell me/show please an example of how you can select a key from a group that pops up in the pressed state on the key in the keyboard? similar example with iphone layout. hold down the key and from above it appears the opportunity to select the desired key

Answer 1

Need more information.
Keyboard is a third party application. Communication between third party applications without a public API is a problem. Finding out which keyboard application a user uses is a separate story, and there are a lot of such applications in the store.