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Any success with bluetooth mouse input?

Level 2

I am struggling with this problem for some time and I have no idea how to solve it.

I am a bit basic if it comes to the Java. I am using Unity to develop my app and I have problem with mouse connected to the android device via OTG usb. The problem is:

When I move the mouse pointer on the edge of the screen then I cannot get a mouse delta position, it always return 0 (but I really need to know a mouse delta position all the time even when the mouse pointer reach a screen edge).
On PC on other hand it works fine even if your mouse pointer reach edge you still can read the mouse delta position here is a video:

I was trying to read it by

Input.GetAxis("Mouse X");
Input.GetAxisRaw("Mouse X");
I tried also:

Cursor.lockState = CursorLockMode.Locked;
Cursor.lockState = CursorLockMode.Confined;
But none of these work on android, receiving of mouse delta position stops after mouse pointer reach the edge of the screen.

Here is a video: When the cursor reached the edge I was still moving it physically and no delta X changed.

I was trying to experiment with making an android lib because I have read somewhere that you can get an access to the mouse pointer data by setOnGenericMotionListener or something like that. But I don't know how to achieve that. Here is my code. It doesn't blow up after calling SetListener because I get a toast message.

package com.test.mouselib;
import android.content.Context;
import android.os.Handler;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Toast;
import android.util.Log;
import android.os.Looper;

public class MouseTest extends Application
public void SetListener(final Activity ctx, final String message)
View view = ctx.getCurrentFocus();
view.setOnGenericMotionListener(new View.OnGenericMotionListener() {
public boolean onGenericMotion(View v, MotionEvent event) {
last = event.toString();
return false;
new Handler(Looper.getMainLooper()).post(new Runnable() {
public void run() {
Toast.makeText(ctx, message, Toast.LENGTH_SHORT).show();