三星拍照后，图片竟然是旋转的，众多手机唯有三星拍照是旋转的，但是你又不能不处理。
首先你要先判断这张图片有木有旋转，图片都是自带这些信息的，方法如下：
/*** 读取图片属性：旋转的角度** @param path 图片绝对路径* @return degree旋转的角度*/public static int readPictureDegree(String path) {int degree = 0;try {ExifInterface exifInterface = new ExifInterface(path);int orientation = exifInterface.getAttributeInt(ExifInterface.TAG_ORIENTATION,ExifInterface.ORIENTATION_NORMAL);switch (orientation) {case ExifInterface.ORIENTATION_ROTATE_90:degree = 90;break;case ExifInterface.ORIENTATION_ROTATE_180:degree = 180;break;case ExifInterface.ORIENTATION_ROTATE_270:degree = 270;break;}} catch (IOException e) {e.printStackTrace();}return degree;}当然三星手机拍照一般都是：
degree = 90;如果degree != 0 ，就说明图片是旋转的。假设我们需要发送一张图片，不可能对原来路径下的图片进行修改，所以需要把要处理的图片在复制一份再进行处理；方法如下：
/*** 复制文件** @param oldPath* @param newPath*/public static void copyFile(String oldPath, String newPath) {try {int bytesum = 0;int byteread = 0;File oldfile = new File(oldPath);if (oldfile.exists()) { //文件存在时InputStream inStream = new FileInputStream(oldPath); //读入原文件FileOutputStream fs = new FileOutputStream(newPath);byte[] buffer = new byte[1444];int length;while ((byteread = inStream.read(buffer)) != -1) {bytesum += byteread; //字节数 文件大小System.out.println(bytesum);fs.write(buffer, 0, byteread);}inStream.close();}} catch (Exception e) {System.out.println("复制单个文件操作出错");e.printStackTrace();}}最后再对相应的图片做旋转处理，先贴上图片旋转的处理方法：
/*** 旋转图片** @param angle* @param bitmap* @return Bitmap*/public static Bitmap rotaingImageView(int angle, Bitmap bitmap) {// 旋转图片 动作Matrix matrix = new Matrix();matrix.postRotate(angle);// 创建新的图片Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0,bitmap.getWidth(), bitmap.getHeight(), matrix, true);return resizedBitmap;}这里传入相应的角度和bitmap就行，最后贴上图片旋转处理的全部代码：
/*** 旋转的图片生成正的** @param path*/public static void rotaingDegreeImage(String path) {BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();//获取宽高度bitmapOptions.inJustDecodeBounds = true;BitmapFactory.decodeFile(path, bitmapOptions);/*** 计算sampleSize最优值*/bitmapOptions.inSampleSize = computeSampleSize(bitmapOptions, -1, 2048 * 1536);bitmapOptions.inJustDecodeBounds = false;int degree = readPictureDegree(path);Bitmap cameraBitmap = BitmapFactory.decodeFile(path, bitmapOptions);/*** 把图片旋转为正的方向*/cameraBitmap = rotaingImageView(degree, cameraBitmap);FileOutputStream out;try {out = new FileOutputStream(path);cameraBitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}}这里还用到：
computeSampleSize（）
/*** 计算sampleSize最优值** @param options* @param minSideLength* @param maxNumOfPixels* @return*/public static int computeSampleSize(BitmapFactory.Options options, int minSideLength, int maxNumOfPixels) {int initialSize = computeInitialSampleSize(options, minSideLength, maxNumOfPixels);int roundedSize;if (initialSize <= 8) {roundedSize = 1;while (roundedSize < initialSize) {roundedSize <<= 1;}} else {roundedSize = (initialSize + 7) / 8 * 8;}return roundedSize;}中间调用：
private static int computeInitialSampleSize(BitmapFactory.Options options, int minSideLength, int maxNumOfPixels) {double w = options.outWidth;double h = options.outHeight;int lowerBound = (maxNumOfPixels == -1) ? 1 : (int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels));int upperBound = (minSideLength == -1) ? 128 : (int) Math.min(Math.floor(w / minSideLength), Math.floor(h / minSideLength));if (upperBound < lowerBound) {// return the larger one when there is no overlapping zone.return lowerBound;}if ((maxNumOfPixels == -1) && (minSideLength == -1)) {return 1;} else if (minSideLength == -1) {return lowerBound;} else {return upperBound;}}有了这几个方法。一切OK。
