question: private void initCircleCropWindow ( @ NonNull RectF bitmapRect ) { mOffset = 0.1f * Math . min ( bitmapRect . width ( ) , bitmapRect . height ( ) ) ; mDrawableWidth = bitmapRect . width ( ) ; mDrawableHeight = bitmapRect . height ( ) ; mCenterPointX = mDrawableWidth / 2.0f ; mCenterPointY = mDrawableHeight / 2.0f ; mRadius = ( Math . min ( mDrawableWidth , mDrawableHeight ) - mOffset ) / 2.0f ; }
target:  Initialize the crop window by setting the proper values. <p/> If fixed aspect ratio is turned off, the initial crop window will be set to the displayed image with 10% margin.