Android Bitmap contour
I'm trying to draw the contour of my drawable,
I tried to use Blur, as in this page: How to make glow effect around a bitmap? Its effect is not what I want, I want a "solid" c开发者_如何学JAVAontour, not blurred. anyone knows how?There is no outline type filter or mask that I can find, while blur and shadow mask are not very strong. Hence you could create your own effect by using color filter and scale. This example would create a red contour
ColorFilter filter;
filter = new PorterDuffColorFilter(0xFFFF0000, PorterDuff.Mode.SRC_IN);
paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setColorFilter(filter);
canvas.save();
canvas.scale(1.1f, 1.1f,imageCenterX , imageCenterY);
canvas.drawBitmap(image, imageX, imageY, paint);
canvas.restore();
canvas.drawBitmap(image, imageX, imageY, null);
It is fast enough for a game frame animation, I've tested it.
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