How do I make the selected item change in a list picker when a new item is tapped?

Hello!

I am using a list picker and had to style it without the "Ok" button in the footer in order to match the other popups I used. However, I cant seem to figure out how to get the picker to update the selected item without calling the accept command with the ok button. I wanted to use an event to command behavior in order to call the accept command when the selection changes, but it looks like the selection changed event only fires when the accept command is called. Currently, if I tap a new item in the list, it will change the highlighted item but not the value in the display. I've attached a screen shot of my picker so you can see what it looks like without the ok button. Are there any work arounds to change the selected item and close the popup when a new item is clicked? Or is my time better served looking for a new tool to use?

Thanks!