REQUIREMENTS$/$ ASSIGNMENT QUESTION

Students are required to use Android Studio to answer these questions. A softcopy of

answers for each question should have the captured interface, layout codes and main java

codes. You may use Microsoft Word to put the source codes of the xml and java and screen

capture of the User Interface.

QUESTION $1$

a$)$ Produce the mobile calculator interface as shown below. Include a validation check of

the input from the user. If number is empty, display an error notification else do the

calculation for Addition $(+),$ Subtraction $(-),$ Multiplication $(*)$ and Division $(/).$