One Listpicker for a few Textboxes


I am looking for a way to have ONE Listpicker for a few Textboxes.

It should work like this:

When Textbox1 ist touched the Listpicker should open and after selection the Listpickerselection should appear in Textbox1

Now, Textbox 2 ist touched and the same should happen for Textbox 2

How can I save that Textbox 1 or 2 is touched in order to place the selection in the correct Textbox?

I tried it in the following way but this did not work 100% because the selection first appears when another Textbox is touched and not immediately after selection