System keyboard — MRTK3

A Unity application can invoke the system keyboard at any time. The system keyboard will behave according to the target platform's capabilities. For example, the keyboard on HoloLens 2 would support direct hand interactions. Additionally, the system keyboard won't show up when performing Holographic Remoting from the editor to a HoloLens.

How to invoke the system keyboard

[SerializeField]
private TouchScreenKeyboard keyboard;

...

public void OpenSystemKeyboard()
{
    keyboard = TouchScreenKeyboard.Open("", TouchScreenKeyboardType.Default, false, false, false, false);
}

How to read the input

[SerializeField]
private TouchScreenKeyboard keyboard;

...

private void Update()
{
    if (keyboard != null)
    {
        keyboardText = keyboard.text;
        // Do stuff with keyboardText
    }
}

Meta Quest specific setup

If you're targeting Meta Quest, you'll need to make a modification to AndroidManifest.xml for the keyboard to show up for Quest. Please refer to the documentation for Unity's XRI Examples repo for details.