Android 图片缩放引起的OOM异常全篇

来源：互联网发布：java年月日时分秒插件编辑：程序博客网时间：2024/04/27 21:59

传输文件，或者设置头像，我们一般都会检查原始图片的大小，作缩放处理。

　　常用的Java版缩放图片代码：

public Bitmap getZoomImage(Bitmap src, int desW, int desH){Bitmap desImg = null;int srcW = src.getWidth(); // 原始图像宽int srcH = src.getHeight(); // 原始图像高int[] srcBuf = new int[srcW * srcH]; // 原始图片像素信息缓存src.getPixels(srcBuf, 0, srcW, 0, 0, srcW, srcH);// 计算插值表int[] tabY = new int[desH];int[] tabX = new int[desW];int sb = 0;int db = 0;int tems = 0;int temd = 0;int distance = srcH > desH ? srcH : desH;for (int i = 0; i <= distance; i++){/* 垂直方向 */tabY[db] = sb;tems += srcH;temd += desH;if (tems > distance){tems -= distance;sb++;}if (temd > distance){temd -= distance;db++;}}sb = 0;db = 0;tems = 0;temd = 0;distance = srcW > desW ? srcW : desW;for (int i = 0; i <= distance; i++){/* 水平方向 */tabX[db] = (short) sb;tems += srcW;temd += desW;if (tems > distance){tems -= distance;sb++;}if (temd > distance){temd -= distance;db++;}}// 生成放大缩小后图形像素int[] desBuf = new int[desW * desH];int dx = 0;int dy = 0;int sy = 0;int oldy = -1;for (int i = 0; i < desH; i++){if (oldy == tabY[i]){System.arraycopy(desBuf, dy - desW, desBuf, dy, desW);}else{dx = 0;for (int j = 0; j < desW; j++){desBuf[dy + dx] = srcBuf[sy + tabX[j]];dx++;}sy += (tabY[i] - oldy) * srcW;}oldy = tabY[i];dy += desW;}// 生成图片desImg = Bitmap.createBitmap(desBuf, desW, desH, Bitmap.Config.ARGB_8888);return desImg;}public Bitmap getZoomImage(Bitmap src, int desW, int desH){Bitmap desImg = null;int srcW = src.getWidth(); // 原始图像宽int srcH = src.getHeight(); // 原始图像高int[] srcBuf = new int[srcW * srcH]; // 原始图片像素信息缓存src.getPixels(srcBuf, 0, srcW, 0, 0, srcW, srcH);// 计算插值表int[] tabY = new int[desH];int[] tabX = new int[desW];int sb = 0;int db = 0;int tems = 0;int temd = 0;int distance = srcH > desH ? srcH : desH;for (int i = 0; i <= distance; i++){/* 垂直方向 */tabY[db] = sb;tems += srcH;temd += desH;if (tems > distance){tems -= distance;sb++;}if (temd > distance){temd -= distance;db++;}}sb = 0;db = 0;tems = 0;temd = 0;distance = srcW > desW ? srcW : desW;for (int i = 0; i <= distance; i++){/* 水平方向 */tabX[db] = (short) sb;tems += srcW;temd += desW;if (tems > distance){tems -= distance;sb++;}

常用的Android版缩放图片代码：