title: Detect Keyboard event in Flutter
body: <p>How to detect keyboard events on TextFormField in Flutter? If the user deletes the last letter and presses the delete button again, the cursor should jump back to the previous TextFormField.</p>
  
  <p>I would like to implement a pin-enter screen, something like that one.</p>
  
  <p><a href="https://mobile-solutions.ingenico.com/wp-content/uploads/IMG_022.png" rel="noreferrer">https://mobile-solutions.ingenico.com/wp-content/uploads/IMG_022.png</a></p>