Open / Close Android on-screen Keyboard

I have a widget with several text boxes

It’s being used to enter 5 digit codes. When I tap the first text box, the on-screen keyboard appears and I enter a letter. I am then using a Set User Focus node to move the cursor to the second box. This works fine, but the on-screen keyboard closes and I need to tap the second box to open it. I want users to be able to enter in 5 characters from the keyboard without having to manually open close it. Is there any way to trigger this behavior?