本文介绍了Android的图像梯度的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想创建上的图像的顶部的辉光的效果。在黑暗中它几乎工作,但明亮的图像,你可以看到像一个灰色的矩形,如下图所示:
I want to create a "glow" effect on top of an image. On dark it's almost working, but on bright images you can see a gray rectangle on image, as seen in below image:
下面是我的code:
public static Bitmap drawModifiedImage(Bitmap bitmap) {
Canvas bigCanvas = new Canvas(bitmap);
Bitmap b = Bitmap.createBitmap(bitmap.getWidth(), 20, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
c.drawColor(Color.TRANSPARENT);
LinearGradient grad = new LinearGradient(bitmap.getWidth()/2, 0, bitmap.getWidth()/2, 20, Color.WHITE, Color.TRANSPARENT, Shader.TileMode.CLAMP);
Paint p = new Paint();
p.setStyle(Paint.Style.FILL);
p.setShader(grad);
c.drawRect(0, 0, bitmap.getWidth(), 20, p);
bigCanvas.drawBitmap(bitmap, 0, 0, null);
bigCanvas.drawBitmap(b,0,0, null);
return bitmap;
}
我是什么做错了吗?
What am I doing wrong?
推荐答案
我已经找到了答案。相反Color.TRANSPARENT的,我用至0x00FFFFFF:
I've found the answer. Instead of Color.TRANSPARENT, I've used 0X00FFFFFF:
LinearGradient grad = new LinearGradient(bitmap.getWidth()/2, 0, bitmap.getWidth()/2, 20, Color.WHITE, 0X00FFFFFF, Shader.TileMode.CLAMP);
这篇关于Android的图像梯度的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!