解决三星手机拍照后，图片旋转。

来源：互联网发布：淘宝服装模特名字编辑：程序博客网时间：2024/04/26 13:02
<span style="font-size:18px;">最近项目中遇到用三星手机拍照，图片会自动旋转，应该是三星内部系统的功能，然后需要是不让他旋转，找到了方法。原理就是，获取到图片，判断它的旋转角度，然后相应的旋转回来。在拍照的返回结果中，获取到图片的路径。即activityforresult方法中。 path = filePath + fileName;  //path 为拍照返回的路径                    File file = new File(path);                    int degree = readPictureDegree(file.getAbsolutePath());                    Bitmap smallBitmap=FileUtils.compressSize(path, 800, 800);                    smallBitmap = rotaingImageView(degree, smallBitmap);                saveAllPath = FileUtils.saveBitmap(smallBitmap, System.currentTimeMillis() +(Math.random() * 10000) + ".png");//质量压缩并存储得到pathImageItem takePhoto = new ImageItem();takePhoto.setBitmap(smallBitmap);takePhoto.setImagePath(saveAllPath);Bimp.tempSelectBitmap.add(takePhoto);/**     * 尺寸压缩     * @param path 图片绝对路径     * @return degree旋转的角度     */ public static Bitmap compressSize(final String path,final int w,final int h){                     //Looper.prepare();                       // TODO Auto-generated method stub    BitmapFactory.Options opts = new BitmapFactory.Options();           // 设置为ture只获取图片大小           opts.inJustDecodeBounds = true;//只读边,不读内容           opts.inPreferredConfig = Bitmap.Config.ARGB_8888;           // 返回为空           BitmapFactory.decodeFile(path, opts);           int width = opts.outWidth;           int height = opts.outHeight;        // 判断后缀名                   String suffix = "";                   CompressFormat format = null;                   if (path.endsWith(".jpg")) {                       suffix = ".jpg";                       format = CompressFormat.JPEG;                   } else if (path.endsWith(".jpeg")) {                       suffix = ".jpeg";                       format = CompressFormat.JPEG;                   } else if (path.endsWith(".png")) {                       suffix = ".png";                       format = CompressFormat.PNG;                   } else {                       suffix = ".jpg";                       format = CompressFormat.JPEG;                   }           float scaleWidth = 0.f, scaleHeight = 0.f;           if (width > w || height > h) {//如果宽度大于 传入的宽度  或者 高度大于 传入的高度大于               // 缩放               scaleWidth = ((float) width) / w;               scaleHeight = ((float) height) / h;           }           opts.inJustDecodeBounds = false;           //缩放后的高度和宽度取最大值           float scale = Math.max(scaleWidth, scaleHeight);           opts.inSampleSize = (int) scale;//此处是最后的宽高值          Bitmap bMapRotate = BitmapFactory.decodeFile(path, opts);          if (bMapRotate!=null) {return bMapRotate;}          return null;    } /**     * 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;    }    /*    *    * 旋转图片    * */    public static Bitmap rotaingImageView(int angle , Bitmap bitmap) {        //旋转图片 动作        Matrix matrix = new Matrix();        ;        matrix.postRotate(angle);        System.out.println("angle2=" + angle);        // 创建新的图片        Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0,                bitmap.getWidth(), bitmap.getHeight(), matrix, true);        return resizedBitmap;    }  /**     * 存储图片，返回路径     * @param bm     * @param picName     * @return     */    public static String saveBitmap(Bitmap bm, String picName) {        try {            if (!isFileExist(picName)) {                File tempf = createSDDir("");            }            File f = new File(SDPATH, picName);            if (f.exists()) {                f.delete();            }            FileOutputStream out = new FileOutputStream(f);            bm.compress(Bitmap.CompressFormat.PNG, 100, out);            out.flush();            out.close();        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        return SDPATH + picName;    }</span>
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