How to erase previous drawing on Canvas?

android canvas drawing

canvas.drawColor(0, Mode.CLEAR);

android canvas drawing

canvas.drawColor(0, Mode.CLEAR);

android canvas drawing

overlayBitmap.eraseColor(Color.TRANSPARENT);

This simply sets an existing Bitmap to all transparent.

I use this to "clear" a Bitmap object that I use to overlay on top of another to show a cropping window.

CodeHunter