Android人脸识别Demo竖屏YUV方向调整和图片保存(分享)

 /**  * 视频顺时针旋转90  * 该方法仅仅在竖屏时候使用  * */ public static byte[] rotateYUV420Degree90(byte[] data, int imageWidth,          int imageHeight) {  byte[] yuv = new byte[imageWidth * imageHeight * 3 / 2];  int i = 0;  for (int x = 0; x < imageWidth; x++) {   for (int y = imageHeight - 1; y >= 0; y--) {    yuv[i] = data[y * imageWidth + x];    i++;   }  }  i = imageWidth * imageHeight * 3 / 2 - 1;  for (int x = imageWidth - 1; x > 0; x = x - 2) {   for (int y = 0; y < imageHeight / 2; y++) {    yuv[i] = data[(imageWidth * imageHeight) + (y * imageWidth) + x];    i--;    yuv[i] = data[(imageWidth * imageHeight) + (y * imageWidth)      + (x - 1)];    i--;   }  }  return yuv; } public static byte[] YUV420spRotate270(byte[] src, int width, int height) {  int count = 0;  int uvHeight = height >> 1;  int imgSize = width * height;  byte[] des = new byte[imgSize * 3 >> 1];  //copy y  for (int j = width - 1; j >= 0; j--) {   for (int i = 0; i < height; i++) {    des[count++] = src[width * i + j];   }  }  //u,v  for (int j = width - 1; j > 0; j -= 2) {   for (int i = 0; i < uvHeight; i++) {    des[count++] = src[imgSize + width * i + j - 1];    des[count++] = src[imgSize + width * i + j];   }  }  return des; } private int i = 1; private String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/0Face/"; private Calendar now = new GregorianCalendar(); private SimpleDateFormat simpleDate = new SimpleDateFormat("yyyyMMddHHmmss", Locale.getDefault()); private String fileName = simpleDate.format(now.getTime()); /**  * @param data yuv图像数据  * @param width   * @param height  */ public void saveImg(byte[] data, int width, int height) {  File dir = new File(path);  if (!dir.exists()) dir.mkdirs();  File f = new File(path + (fileName + "-" + i++) + ".jpg");  FileOutputStream fOut = null;  try {   //yuv转成bitmap   YuvImage image = new YuvImage(data, ImageFormat.NV21, width, height, null);   ByteArrayOutputStream stream = new ByteArrayOutputStream();   image.compressToJpeg(new Rect(0, 0, width, height), 80, stream);   Bitmap bmp = BitmapFactory.decodeByteArray(stream.toByteArray(), 0, stream.size());   //bitmap保存至本地   fOut = new FileOutputStream(f);   bmp.compress(Bitmap.CompressFormat.JPEG, 100, fOut);   fOut.flush();   fOut.close();   bmp.recycle();   stream.close();  } catch (Exception ex) {   Log.e("Sys", "Error:" + ex.getMessage());  } }