Coding the Bullet class

The Bullet class is not complicated. It is a tiny square bouncing around the screen and will have many similarities to the ball in the Pong game. To get started, add the member variables shown highlighted next.

import android.graphics.RectF;

class Bullet {

    // A RectF to represent the size and location of the bullet
    private RectF mRect;

    // How fast is the bullet traveling?
    private float mXVelocity;
    private float mYVelocity;

    // How big is a bullet
    private float mWidth;
    private float mHeight;
}

We now have a RectF called mRect that will represent the position of the bullet. You will need to add the import statement for the RectF class as well. In addition, we have two float variables to represent the direction/speed of travel (mXVelocity and mYVelocity) and two float variables to represent the width and height of a bullet (mWidth and mHeight).

Next, add the Bullet constructor that can be called when a new Bullet object is created and...