Draw a hollow circle on an Android Canvas

I am working on creating a custom view where a user can select an angle. Below is an example of what the end result should look like: I am achieving this with the following code: ``` mPaint.setColor(Color.BLACK); canvas.drawCircle((int) (mSize.right / 2), (int) (mSize.bottom / 2), mWidthOutside, mPaint); mPaint.setColor(Color.LTGRAY); canvas.drawCircle((int) (mSize.right / 2), (int) (mSize.bottom / 2), mWidthInside, mPaint); ``` The problem with doing it this way, is the background is a static `LTGRAY`, which I hope to make Transparent. How would I go about leaving the center of the circle transparent? I have tried the following hoping the the `drawArc` function would only create a line the width of the paint, and not fill the center. It does in face fill the center. ``` RectF rectF = new RectF(centerX - mRadius, centerY - mRadius, centerX + mRadius, centerY + mRadius); canvas.drawArc(rectF, 0, 360, false, mPaint); ``` Suggestions on how to keep the center of the circle transparent?