这里有新鲜出炉的精品教程,程序狗速度看过来!
Android是一种基于Linux的自由及开放源代码的操作系统,主要使用于移动设备,如智能手机和平板电脑,由Google公司和开放手机联盟领导及开发。尚未有统一中文名称,中国大陆地区较多人使用“安卓”或“安致”。
这篇文章主要介绍了Android模糊处理简单实现毛玻璃效果的相关资料,需要的朋友可以参考下
自从iOS系统引入了Blur效果,也就是所谓的毛玻璃、模糊化效果、磨砂效果,各大系统就开始竞相模仿,这是怎样的一个效果呢,我们先来看一下,如下面的图片:
实现效果大家都知道了,如何在Android中实现呢,说白了就是对图片进行模糊化处理,小编先给大家讲一下Android高级模糊技术的原理,如下:
我最近在做一款App,其中有一个功能需要对图片处理实现毛玻璃的特效,经过一番研究,找到了3中实现方案,其中各有优缺点,如果系统的api在16以上,可以使用系统提供的方法直接处理图片,但是小编认为下边的解决方案是实现效果最好的。
代码如下:
- public Bitmap fastblur(Context context, Bitmap sentBitmap, int radius) {
- Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);
- if (radius < 1) {
- return (null);
- }
- int w = bitmap.getWidth();
- int h = bitmap.getHeight();
- int[] pix = new int[w * h];
- bitmap.getPixels(pix, 0, w, 0, 0, w, h);
- int wm = w - 1;
- int hm = h - 1;
- int wh = w * h;
- int div = radius + radius + 1;
- int r[] = new int[wh];
- int g[] = new int[wh];
- int b[] = new int[wh];
- int rsum,
- gsum,
- bsum,
- x,
- y,
- i,
- p,
- yp,
- yi,
- yw;
- int vmin[] = new int[Math.max(w, h)];
- int divsum = (div + 1) >> 1;
- divsum *= divsum;
- int temp = 256 * divsum;
- int dv[] = new int[temp];
- for (i = 0; i < temp; i++) {
- dv[i] = (i / divsum);
- }
- yw = yi = 0;
- int[][] stack = new int[div][3];
- int stackpointer;
- int stackstart;
- int[] sir;
- int rbs;
- int r1 = radius + 1;
- int routsum,
- goutsum,
- boutsum;
- int rinsum,
- ginsum,
- binsum;
- for (y = 0; y < h; y++) {
- rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
- for (i = -radius; i <= radius; i++) {
- p = pix[yi + Math.min(wm, Math.max(i, 0))];
- sir = stack[i + radius];
- sir[0] = (p & 0xff0000) >> 16;
- sir[1] = (p & 0x00ff00) >> 8;
- sir[2] = (p & 0x0000ff);
- rbs = r1 - Math.abs(i);
- rsum += sir[0] * rbs;
- gsum += sir[1] * rbs;
- bsum += sir[2] * rbs;
- if (i > 0) {
- rinsum += sir[0];
- ginsum += sir[1];
- binsum += sir[2];
- } else {
- routsum += sir[0];
- goutsum += sir[1];
- boutsum += sir[2];
- }
- }
- stackpointer = radius;
- for (x = 0; x < w; x++) {
- r[yi] = dv[rsum];
- g[yi] = dv[gsum];
- b[yi] = dv[bsum];
- rsum -= routsum;
- gsum -= goutsum;
- bsum -= boutsum;
- stackstart = stackpointer - radius + div;
- sir = stack[stackstart % div];
- routsum -= sir[0];
- goutsum -= sir[1];
- boutsum -= sir[2];
- if (y == 0) {
- vmin[x] = Math.min(x + radius + 1, wm);
- }
- p = pix[yw + vmin[x]];
- sir[0] = (p & 0xff0000) >> 16;
- sir[1] = (p & 0x00ff00) >> 8;
- sir[2] = (p & 0x0000ff);
- rinsum += sir[0];
- ginsum += sir[1];
- binsum += sir[2];
- rsum += rinsum;
- gsum += ginsum;
- bsum += binsum;
- stackpointer = (stackpointer + 1) % div;
- sir = stack[(stackpointer) % div];
- routsum += sir[0];
- goutsum += sir[1];
- boutsum += sir[2];
- rinsum -= sir[0];
- ginsum -= sir[1];
- binsum -= sir[2];
- yi++;
- }
- yw += w;
- }
- for (x = 0; x < w; x++) {
- rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
- yp = -radius * w;
- for (i = -radius; i <= radius; i++) {
- yi = Math.max(0, yp) + x;
- sir = stack[i + radius];
- sir[0] = r[yi];
- sir[1] = g[yi];
- sir[2] = b[yi];
- rbs = r1 - Math.abs(i);
- rsum += r[yi] * rbs;
- gsum += g[yi] * rbs;
- bsum += b[yi] * rbs;
- if (i > 0) {
- rinsum += sir[0];
- ginsum += sir[1];
- binsum += sir[2];
- } else {
- routsum += sir[0];
- goutsum += sir[1];
- boutsum += sir[2];
- }
- if (i < hm) {
- yp += w;
- }
- }
- yi = x;
- stackpointer = radius;
- for (y = 0; y < h; y++) {
- pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum];
- rsum -= routsum;
- gsum -= goutsum;
- bsum -= boutsum;
- stackstart = stackpointer - radius + div;
- sir = stack[stackstart % div];
- routsum -= sir[0];
- goutsum -= sir[1];
- boutsum -= sir[2];
- if (x == 0) {
- vmin[y] = Math.min(y + r1, hm) * w;
- }
- p = x + vmin[y];
- sir[0] = r[p];
- sir[1] = g[p];
- sir[2] = b[p];
- rinsum += sir[0];
- ginsum += sir[1];
- binsum += sir[2];
- rsum += rinsum;
- gsum += ginsum;
- bsum += binsum;
- stackpointer = (stackpointer + 1) % div;
- sir = stack[stackpointer];
- routsum += sir[0];
- goutsum += sir[1];
- boutsum += sir[2];
- rinsum -= sir[0];
- ginsum -= sir[1];
- binsum -= sir[2];
- yi += w;
- }
- }
- bitmap.setPixels(pix, 0, w, 0, 0, w, h);
- return (bitmap);
- }
来源: http://www.phperz.com/article/17/0916/348977.html