Java 要剪切画布圆圈的背景图像吗

要剪切画布圆圈的背景图像吗

canvas.drawBitmap(background_image, 0, 0, null);            
FaceDetector.Face face = faces[0];
tmp_paint.setColor(Color.RED);
`face.getMidPoint(tmp_point);
canvas.drawCircle(tmp_point.x, tmp_point.y, face.eyesDistance(), tmp_paint);

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您可以使用以下功能：

public Bitmap getRoundedShape(Bitmap scaleBitmapImage) {
    int targetWidth = 125;
    int targetHeight = 125;

    Bitmap targetBitmap = Bitmap.createBitmap(targetWidth,
            targetHeight, Bitmap.Config.ARGB_8888);

    Canvas canvas = new Canvas(targetBitmap);
    Path path = new Path();
    path.addCircle(
            ((float) targetWidth - 1) / 2,
            ((float) targetHeight - 1) / 2,
            (Math.min(((float) targetWidth), ((float) targetHeight)) / 2),
            Path.Direction.CCW);
    canvas.clipPath(path);
    Bitmap sourceBitmap = scaleBitmapImage;
    canvas.drawBitmap(
            sourceBitmap,
            new Rect(0, 0, sourceBitmap.getWidth(), sourceBitmap.getHeight()), 
            new Rect(0, 0, targetWidth, targetHeight), 
            p);
    return targetBitmap;
}

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有关更多详细信息，请检查此项：

新矩形中的“p”是什么（0,0，sourceBitmap.getWidth（），sourceBitmap.getHeight（）），新矩形（0,0，targetWidth，targetHeight），p）；这是路径吗？p是油漆的对象