We have updated the DrawThread to run at an arbitrary number of frames per second, adapting to the time required to render instead of a fixed 30 fps, and we are using sprites. Now is the perfect time to add a frames-per-second counter. It is a very easy tool and is also handy to check performance.

We could have used a TextView, but there are some good reasons to draw it on the Canvas directly instead:

We will make a class named FPSCounter that extends from GameObject and looks like this:

public class FPSCounter extends GameObject {
  private final double mPixelFactor;
  private final float mTextWidth;
  private final float mTextHeight;

  private Paint mPaint;
  private long mTotalMillis;
  private int mDraws;
  private float mFps;

  private String mFpsText...