We want to be able to compare the starting coordinate of a touch with the ending coordinate of a touch. How can we do it?
A) We cannot compare those coordinates.
B) We can compare them inside the onTouch method when it is called; nothing additional needed.
C) Store the ending coordinate in an instance variable and compare it to the starting coordinate of the touch inside the onTouch method.
D) Store the starting coordinate in an instance variable and compare it to the ending coordinate of the touch inside the onTouch method.

Question

Quizplus · Accepted Answer

We can store the starting coordinate of the touch in an instance variable when the onTouch method is first called. Then, on subsequent calls to the onTouch method, we can compare the ending coordinate of the touch to the stored starting coordinate to determine the direction and distance of the touch movement. So, option D is the correct answer.

We Want to Be Able to Compare the Starting Coordinate