ProfileDataCache.java 文件源码

private Bitmap getCroppedBitmap(Bitmap bitmap) {
    Bitmap output = Bitmap.createBitmap(
            bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    final Paint paint = new Paint();
    final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());

    paint.setAntiAlias(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(Color.WHITE);

    final float radius =  (bitmap.getWidth() - mImageStrokePx) / 2f;
    canvas.drawCircle(bitmap.getWidth() / 2f, bitmap.getHeight() / 2f, radius, paint);
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(bitmap, rect, rect, paint);

    paint.setColor(mImageStrokeColor);
    paint.setStyle(Paint.Style.STROKE);
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC));
    paint.setStrokeWidth(mImageStrokePx);
    canvas.drawCircle(bitmap.getWidth() / 2f, bitmap.getHeight() / 2f, radius, paint);

    return output;
}