[Xamarin] KeyDownEvent fires twice on Android

 public override bool OnKeyDown([GeneratedEnum] Keycode keyCode, KeyEvent e)
{
    base.OnKeyDown(keyCode, e);

    // work

    return true;
}

// or

public override bool DispatchKeyEvent(KeyEvent e)
{
    base.DispatchKeyEvent(e);

    // work
    if (e.Action == KeyEventActions.Up)
    {
        KeyEventClass.CurrentHandler?.OnKeyUpEvent(e.ScanCode);
    }

    return true;
}

 

If you don't turn on the number lock, there are times when Android keydownevent comes in twice.
It is difficult to control the number lock, so you can return the event to true.