Create CalculatorButtonListener
The **CalculatorButtonListener **class is responsible for handling calculator button click events in an Android application. This class is responsible for handling the logic that is executed when a button is pressed, such as adding a number to the display, performing a math operation, or clearing the current entry.
Generally, the **CalculatorButtonListener **class contains an **onClick **method that is executed when a button is pressed. This method can receive the button that was pressed as a parameter and then perform the corresponding action based on the type of button pressed.
For example, if a numeric button is pressed, the **CalculatorButtonListener **class can call a method in the **CalculatorDisplay **class to add the number to the display.