修改名称。
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package com.xscm.moduleutil.utils;
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import android.graphics.Bitmap;
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import android.graphics.Color;
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import android.graphics.PorterDuff;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import com.blankj.utilcode.util.ScreenUtils;
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public class FastBlurUtil {
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public static Bitmap doBlur(Bitmap sentBitmap, int radius, boolean canReuseInBitmap) {
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Bitmap bitmap;
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if (canReuseInBitmap) {
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bitmap = sentBitmap;
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} else {
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bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);
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}
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if (radius < 1) {
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return (null);
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}
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int w = bitmap.getWidth();
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int h = bitmap.getHeight();
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int[] pix = new int[w * h];
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bitmap.getPixels(pix, 0, w, 0, 0, w, h);
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int wm = w - 1;
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int hm = h - 1;
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int wh = w * h;
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int div = radius + radius + 1;
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int r[] = new int[wh];
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int g[] = new int[wh];
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int b[] = new int[wh];
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int rsum, gsum, bsum, x, y, i, p, yp, yi, yw;
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int vmin[] = new int[Math.max(w, h)];
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int divsum = (div + 1) >> 1;
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divsum *= divsum;
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int dv[] = new int[256 * divsum];
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for (i = 0; i < 256 * divsum; i++) {
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dv[i] = (i / divsum);
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}
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yw = yi = 0;
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int[][] stack = new int[div][3];
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int stackpointer;
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int stackstart;
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int[] sir;
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int rbs;
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int r1 = radius + 1;
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int routsum, goutsum, boutsum;
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int rinsum, ginsum, binsum;
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for (y = 0; y < h; y++) {
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rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
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for (i = -radius; i <= radius; i++) {
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p = pix[yi + Math.min(wm, Math.max(i, 0))];
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sir = stack[i + radius];
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sir[0] = (p & 0xff0000) >> 16;
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sir[1] = (p & 0x00ff00) >> 8;
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sir[2] = (p & 0x0000ff);
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rbs = r1 - Math.abs(i);
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rsum += sir[0] * rbs;
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gsum += sir[1] * rbs;
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bsum += sir[2] * rbs;
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if (i > 0) {
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rinsum += sir[0];
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ginsum += sir[1];
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binsum += sir[2];
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} else {
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routsum += sir[0];
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goutsum += sir[1];
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boutsum += sir[2];
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}
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}
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stackpointer = radius;
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for (x = 0; x < w; x++) {
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r[yi] = dv[rsum];
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g[yi] = dv[gsum];
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b[yi] = dv[bsum];
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rsum -= routsum;
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gsum -= goutsum;
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bsum -= boutsum;
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stackstart = stackpointer - radius + div;
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sir = stack[stackstart % div];
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routsum -= sir[0];
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goutsum -= sir[1];
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boutsum -= sir[2];
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if (y == 0) {
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vmin[x] = Math.min(x + radius + 1, wm);
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}
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p = pix[yw + vmin[x]];
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sir[0] = (p & 0xff0000) >> 16;
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sir[1] = (p & 0x00ff00) >> 8;
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sir[2] = (p & 0x0000ff);
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rinsum += sir[0];
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ginsum += sir[1];
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binsum += sir[2];
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rsum += rinsum;
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gsum += ginsum;
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bsum += binsum;
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stackpointer = (stackpointer + 1) % div;
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sir = stack[(stackpointer) % div];
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routsum += sir[0];
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goutsum += sir[1];
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boutsum += sir[2];
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rinsum -= sir[0];
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ginsum -= sir[1];
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binsum -= sir[2];
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yi++;
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}
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yw += w;
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}
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for (x = 0; x < w; x++) {
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rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
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yp = -radius * w;
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for (i = -radius; i <= radius; i++) {
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yi = Math.max(0, yp) + x;
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sir = stack[i + radius];
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sir[0] = r[yi];
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sir[1] = g[yi];
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sir[2] = b[yi];
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rbs = r1 - Math.abs(i);
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rsum += r[yi] * rbs;
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gsum += g[yi] * rbs;
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bsum += b[yi] * rbs;
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if (i > 0) {
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rinsum += sir[0];
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ginsum += sir[1];
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binsum += sir[2];
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} else {
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routsum += sir[0];
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goutsum += sir[1];
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boutsum += sir[2];
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}
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if (i < hm) {
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yp += w;
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}
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}
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yi = x;
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stackpointer = radius;
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for (y = 0; y < h; y++) {
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// Preserve alpha channel: ( 0xff000000 & pix[yi] )
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pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum];
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rsum -= routsum;
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gsum -= goutsum;
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bsum -= boutsum;
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stackstart = stackpointer - radius + div;
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sir = stack[stackstart % div];
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routsum -= sir[0];
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goutsum -= sir[1];
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boutsum -= sir[2];
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if (x == 0) {
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vmin[y] = Math.min(y + r1, hm) * w;
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}
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p = x + vmin[y];
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sir[0] = r[p];
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sir[1] = g[p];
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sir[2] = b[p];
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rinsum += sir[0];
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ginsum += sir[1];
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binsum += sir[2];
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rsum += rinsum;
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gsum += ginsum;
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bsum += binsum;
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stackpointer = (stackpointer + 1) % div;
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sir = stack[stackpointer];
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routsum += sir[0];
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goutsum += sir[1];
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boutsum += sir[2];
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rinsum -= sir[0];
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ginsum -= sir[1];
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binsum -= sir[2];
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yi += w;
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}
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}
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bitmap.setPixels(pix, 0, w, 0, 0, w, h);
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return (bitmap);
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}
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public static Drawable getForegroundDrawable(Bitmap musicPicRes) {
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/*得到屏幕的宽高比，以便按比例切割图片一部分*/
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final float widthHeightSize = (float) (ScreenUtils.getScreenWidth()
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* 1.0 / ScreenUtils.getScreenHeight() * 1.0);
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Bitmap bitmap = musicPicRes;
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int cropBitmapWidth = (int) (widthHeightSize * bitmap.getHeight());
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int cropBitmapWidthX = (int) ((bitmap.getWidth() - cropBitmapWidth) / 2.0);
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/*切割部分图片*/
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Bitmap cropBitmap = Bitmap.createBitmap(bitmap, cropBitmapWidthX, 0, cropBitmapWidth,
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bitmap.getHeight());
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/*缩小图片*/
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Bitmap scaleBitmap = Bitmap.createScaledBitmap(cropBitmap, bitmap.getWidth() / 50, bitmap
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.getHeight() / 50, false);
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/*模糊化*/
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final Bitmap blurBitmap = FastBlurUtil.doBlur(scaleBitmap, 8, true);
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final Drawable foregroundDrawable = new BitmapDrawable(blurBitmap);
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/*加入灰色遮罩层，避免图片过亮影响其他控件*/
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foregroundDrawable.setColorFilter(Color.GRAY, PorterDuff.Mode.MULTIPLY);
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return foregroundDrawable;
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}
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}
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