This simple app turns your Android phone into a Code Confirmation Screen Demo App.
The user launches the app then clicks on the button marked 'Code Confirmation'. Then another smaller screen pops up with a Code shown that is made up of random numbers. The user is asked to Confirm the code shown. When they click the line a number keypad pops up for them to enter the code in. If they enter the code correctly and click the confirm button a Toast pop up will let them know 'Code entered correct!'. But if they submit the wrong code a Toast pop up will inform them that a wrong code was entered by saying 'Code mismatch!'.
Screen caps taken from App running on a Nexus 5X simulator running Android 8.0 Code Name O (API level 26)