Arduino, android control, real?

Question

Android

Hello. The question has matured regarding the combination of arduino + android.
The essence of the problem:
There is a written application for android, which, when you click on the corners of the screen, for example, changes the background color.
There is an arduino with 4 buttons on each corner.
Is it possible to emulate pressing the screen from under arduino?

Answer 1

If the phone supports OTG, then there is no problem, in extreme cases, you can connect them via Bluetooth or a network.

Answer 2

Since there are programs that assign hard button presses to actions with a touch, there are no particular problems. The Arduino will pretend to be a keyboard, and the click emulator will perform the desired action.

Answer 3

And you can put esp8266 on arduino and connect it via WiFi Issue price 300 rubles + brain

Answer 4

If OTG and keyboard emulation, then Arduino Leonardo? It seems to me that it fits.