Practical exercises to ensure that the basis of the chapter has been understood
The assignment is mandatory for a passing grade in the course.
Create an app that calculates the time it takes to travel a certain amount of distance using a chosen transportation method.
Perform this optional assignment to get one (1) extra credit.
Continue on the Traveltime app from the previous assignment and add event handlers for a few more interactions with the Views in the app. Note that all steps below are actually a description of two major tasks that you will perform, an Undo function using the Back button and a Touch-and-drag operation to change the speed.