Android to android conection

[luerickOdestruidor]

Is it possible that one phone is a hoster and can be controlled by other phone?

[kitswas]

Not yet, see kitswas/VirtualGamePad-PC#12 (comment)

[n-ce]

This is exactly what I came here to request, It will be revolutionary.

[kitswas]

I did a bit of preliminary research and here's what I found.
Let me know if I missed something.

Below are the ways to inject input on Android.

Method	How It Works	Requires Root?	Play Store Possible?	Game Compatibility
1. uinput (Root)	Creates a real virtual gamepad at the kernel level. (NDK)	Yes	No	Excellent. Works with all games.
2. Accessibility	Simulates screen taps and gestures. (Kotlin/Java)	No	Yes	Poor. Only works for games with on-screen touch controls.
3. InputManager	Injects events using the official API. (Kotlin/Java)	Effectively, yes. (Must be a system app).	No	Excellent. Works with all games.

Samsung has a similar app which only works on Samsung TVs. The android.permission.INJECT_EVENTS permission required for 3 is available only to ROM developers (Google, Samsung, etc.)

Hence, true Gamepad injection is possible on rooted devices only. (e.g. The PC server uses uinput on Linux)

A server that uses Accessibility for input injection is possible, but expect a messy and limited experience.

[kitswas]

Another option is a serverless setup using the BluetoothHidDevice API but it only works via Bluetooth.
VB Bluetooth Keyboard probably does this.

[n-ce]

Yes. I was talking about using wireless connectivity.

[alr86]

Use Virtual Button (support Bluetooth) or BT Controller (support Bluetooth and Wi-Fi) for now