Learning Java by Building Android Games - Second Edition

Coding the PongGame class

The first thing we will do is solve the problem of our PongGame class not being of type View. Update the class declaration as highlighted, like this:

class PongGame extends SurfaceView {

You will be prompted to import the android.view.SurfaceView class as shown in the next image:

Click OK to confirm.

SurfaceView is a descendant of View and now PongGame is, by inheritance, also a type of View. Look at the import statement that has been added. This relationship is made clear as highlighted next.

android.view.SurfaceView

Tip

Remember that it is because of polymorphism that we can send descendants of View to setContentView method ...