思路：

1.使用findViewByid获得需要设置毛玻璃的控件。

2.调用 setBlurBackground(Bitmap bmp)方法(下面会给出)，参数为Bitmap类型，给控件设置毛玻璃背景！

3.已完成，

方法：

/**

* 设置毛玻璃背景

* 背景图片 Bitmap

*/

private void setBlurBackground(Bitmap bmp)

{

final Bitmap blurBmp = BlurUtil.fastblur(ParentCircleInfoActivity.this, bmp, 10);//0-25，表示模糊值

final Drawable drawable = ImageUtil.getDrawable(this,blurBmp);//将bitmap类型图片 转为 Drawable类型

mRLHead.post(new Runnable() //调用UI线程

{

@Override

public void run()

{

mRLHead.setBackgroundDrawable(drawable);

}

});

}

bitmap 转 drawable:

/**

* bitmap -> drawable

* @param context

* @param bm

* @return

*/

public static Drawable getDrawable(Context context, Bitmap bm){

BitmapDrawable bd= new BitmapDrawable(context.getResources(),bm);

return bd;

}

使用到的工具类：

public class BlurUtil

{

@SuppressLint("NewApi")

public static Bitmap fastblur(Context context, Bitmap sentBitmap, int radius)

{

if (VERSION.SDK_INT > 16)

{

Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);

final RenderScript rs = RenderScript.create(context);

final Allocation input = Allocation.createFromBitmap(rs,sentBitmap, Allocation.MipmapControl.MIPMAP_NONE,Allocation.USAGE_SCRIPT);

final Allocation output = Allocation.createTyped(rs,input.getType());

final ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));

script.setRadius(radius);/* e.g. 3.f */

script.setInput(input);

script.forEach(output);

output.copyTo(bitmap);

return bitmap;

}

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];

Log.e("pix", w + " " + h + " " + pix.length);

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 dv[] = new int[256 * divsum];

for (i = 0; i < 256 * divsum; 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);

}

}

总结

以上所述是小编给大家介绍的Android毛玻璃背景效果简单实现代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！