Frame by frame #5

SpinnerLoaderView.java

@Override
protected void onDraw(Canvas canvas) {
    // 1. The size of the base circle
    // 2. Where the arc starts in degrees
    // 3. The size of the arc in degrees, starting at #2
    // 4. If the arc should be drawn as a pie, false makes it a stroke
    // 5. The paint to use
    canvas.drawArc(mArcBounds, mArcStart, mArcSize, false, mPaint);
}