Android 自定义饱和度 实现黑白imageview

# Android 自定义饱和度 实现黑白imageview

@Auther: David

@email ：[email protected]

Learn from yesterday, live for today, hope for tomorrow.

                 start

step 1:得到Imageview，并附上图片：

        Resources res = getResources();
        Bitmap bmp= BitmapFactory.decodeResource(res, R.drawable.h1);
        imageview.setImageBitmap(bmp);

step 2:转换颜色饱和度，实现黑白效果：

        ColorMatrix cm = new ColorMatrix();
        cm.setSaturation(0f); // 设置饱和度:0为纯黑白，饱和度为0；1为饱和度为100，即原图；
        ColorMatrixColorFilter grayColorFilter = new ColorMatrixColorFilter(cm);
        imageview.setColorFilter(grayColorFilter);

                 end

@Auther: David

@email ：[email protected]

Learn from yesterday, live for today, hope for tomorrow.