How do you map to KeyCode.JoystickButton0 in the new Unity Input System?

Question

I'm working on a Unity project for Android TV and Fire TV that utilizes the new input system released in v2019.3.

Fire TV's button mappings in the old system were as follows:

Back                    KeyCode.Escape
Select (D-Pad Center)   KeyCode.JoystickButton0
Left (D-Pad)            KeyCode.LeftArrow
Right (D-Pad)           KeyCode.RightArrow
Up (D-Pad)              KeyCode.UpArrow
Down (D-Pad)            KeyCode.DownArrow

I've successfully mapped everything but Select/D-Pad Center with the following Binding Paths in the new system:

Escape [Keyboard]
Right Arrow [Keyboard]
Left Arrow [Keyboard]
Up Arrow [Keyboard]
Down Arrow [Keyboard]

If I map to Any Key [Keyboard] and implement the following code as the callback, it shows up as key: JoystickButton0, which matches Amazon's documentation, but doesn't exist as an option in the new system under keyboard binding paths:

public void DebugKey(InputAction.CallbackContext context)
{
    foreach(KeyCode vKey in System.Enum.GetValues(typeof(KeyCode))){
         if(Input.GetKey(vKey)){
             Debug.Log ("key: " + vKey);
         }
    }
}

I've tried various buttons under Gamepad, Android Gamepad, Joystick, and Android Joystick without any success. Another odd thing is that the Center/D-Pad works fine on UI Buttons without any binding.

What is the proper way to map to the legacy KeyCode.JoystickButtonX naming convention with the new input system?

Thanks!

Answer 1

In New system, the devices are read as HID, the KeyCode is not useful, so if you want to read the status of button of joystick, you could do that:

using UnityEngine.InputSystem;


public Joystick joy;

void Start()
{
     joy = Joystick.current;
}

void FixedUpdate()
{
    var button2 = joy.allControls[2].IsPressed();
    if (button2)
    {
        Debug.Log("Button2 of current joystick is pushed");
    }
}

If you want to map the button0 (in old inputsystem), its now the button1 or trigger

var button1 = joy.allControls[1].IsPressed();

or

var button1 = joy.trigger.IsPressed();

---

And you could test buttons of more sticks..

void Start()
{
    var ListOfJoys = Joystick.all;
     joy = Joystick.current;//here current joy is ListOfJoys[1]
     otherjoy = ListOfJoys[0];
}


    var Buttons = joy.allControls;


    if ((Buttons[2] as ButtonControl).wasPressedThisFrame)
    {
        Debug.Log("b2 pressed during this frame");
    }
    if ((Buttons[2] as ButtonControl).wasReleasedThisFrame)
    {
        Debug.Log("b2 released during this frame");
    }
    if (joy.trigger.wasPressedThisFrame)
    {
        Debug.Log("trig or button1 pressed during this frame");
    }
    if (joy.trigger.wasReleasedThisFrame)
    {
        Debug.Log("trig or button1 released during this fram");
    }
    if (otherjoy.trigger.wasPressedThisFrame)
    {
        Debug.Log("otherjoy trigger");
    }

---

the other way is to use the mapping of new system, i have mapped the action press Only Test1 to button3 of stick

that simplify the code and you could mix event and direct test:

//Newinputsystem is a name of class generated 
private Newinputsystem playerAction;

void Awake()
{
    playerAction = new Newinputsystem();
    playerAction.Player.Test1.performed += ctx => FireTest();
}

void FixedUpdate()
{
    if (playerAction.Player.Test1.triggered)
    {
        Debug.Log("fire!!!");
    }
}

public void FireTest()
{
    Debug.Log("i am in firetest");
}

private void OnEnable()
{
    playerAction.Enable();
}
private void OnDisable()
{
    playerAction.Disable();
}

so you could add new action test2 which will be triggered with action release only for button3...

TO display the HID device, go to menu Window/analysis/input debbugger

you have to see your device (here mine is hotas)

and you click on it and in the tab item HID Descriptor

so i suppose you have selected your device in project setting: