Blinking Button Xamarin Android

Question

How can I make the button have the animation of blinking?

I want to add it while waiting to retrieve the location of the user, but I cannot see any example.

What I have done now is only changing the background then change it again after retrieving the location.

button.SetBackgroundColor(new Color(ContextCompat.GetColor(this.Context, Resource.Color.primaryColor)));

Answer 1

Normally I'd say use Xamarin's Animation class, but you're not asking for any gradual transitions. I would then use System.Threading.Timer:

private readonly Timer _blinkTimer;

Then in your constructor:

_blinkTimer= new Timer(BlinkTimerCallback);

Create the BlinkTimerCallback method:

private void BlinkTimerCallback(object state)
{
    // This is sudo code - I don't know the proper syntax off the top of my head
    if(button.BackgroundColor == red)
    {
        button.SetBackgroundColor(gray);
    }
    else
    {
        button.SetBackgroundColor(red);
    }
}

Then you just switch the timer off or on based on state:

To switch it on:

_blinkTimer.Change(new TimeSpan(0, 0, 1), new TimeSpan(0, 0, 1));

To switch it off:

_blinkTimer.Change(Timeout.Infinite, Timeout.Infinite);