Using android studio

The calculator is one of the essential applications in any mobile device. In this lab assignment, you will design, develop, and test a simple calculator

The minimum calculator requirements are to:

• support four basic calculations (addition, multiplication, subtraction and division).
• support negative numbers
• The app layout has 10 buttons for numbers (0-9)
• The app layout has 4 buttons for +,=,/,* operations, a clear button and an equal sign button
• The app layout demonstrates efficient use of space
• All buttons in the app layout are aligned properly
• The Textview(s) used to display the result use reasonable font size.
• All buttons display the correct value in the result field when clicked.

• The TextView gravity is set to right

• The app handles leading zero suppression (ex 0003 = 3)

• Numbers are appended correctly

• The app supports "running" calculations from left to right as numbers are entered (Test 1+33-18*3/48 -> Did you get results = 1)?

• (note if your app calculates results based on operator precedence, make sure to mention that in the comments when you submit)

• The app shows the intermediate result every time a user clicks in any one of the 4 operator
• A clear button resets the result field
• All operations work with no errors
• The app adapts/scales reasonably to changes in device screen orientation/size
• The app handles divide by zero scenario
• The app doesn't crash at any test scenario
• Optional Feature: The app has 4-digit precision for numbers after the decimal point.
• Optional Feature: Two separate buttons for clear and backspace OR (in case of one button) the clear button works as a backspace [Explain how it works at submission time]