/*** 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 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;}/** 旋转图片 * @param angle * @param bitmap * @return Bitmap */ public 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   return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);  }/**** 将bitmap保存在SD jpeg格式* * @param bitmap*            图片bitmap* @param filePath*            要保存图片路径* @param quality*            压缩质量值*/public void saveImage(Bitmap bitmap, String filePath, int quality) {FileOutputStream fileOutputStream = null;try {fileOutputStream = new FileOutputStream(filePath);bitmap.compress(CompressFormat.JPEG, quality, fileOutputStream);fileOutputStream.flush();fileOutputStream.close();// 如果图片还没有回收，强制回收if (!bitmap.isRecycled()) {bitmap.recycle();System.gc();}} catch (Exception e) {}}bitmap=ImageCompress.decodeSampledBitmapFromResource(filename, 480, 800);//图片旋转int Degree = imageUtils.readPictureDegree(filename);bitmap = imageUtils.rotaingImageView(Degree, bitmap);//保存图片到SD卡//imageCompress.saveImage(bitmap, filename);imageCompress.saveImage(bitmap, filename,90);

/**** 动态设置inSampleSize 倍数* * @param pathName*            图片路径* @param reqWidth*            要压缩的宽度* @param reqHeight*            要压缩的高度* @return*/public static Bitmap decodeSampledBitmapFromResource(String pathName,int reqWidth, int reqHeight) {// 首先设置 inJustDecodeBounds=true 来获取图片尺寸final BitmapFactory.Options options = new BitmapFactory.Options();options.inJustDecodeBounds = true;BitmapFactory.decodeFile(pathName, options);// 计算 inSampleSize 的值options.inSampleSize = calculateInSampleSize(options, reqWidth,reqHeight);// 根据计算出的 inSampleSize 来解码图片生成Bitmapoptions.inJustDecodeBounds = false;return BitmapFactory.decodeFile(pathName, options);}