Android拍照得到的照片旋转了90度

解决办法：

int degree = ImageUtil.readPictureDegree(imageUri.getPath());
Bitmap bmpOk = ImageUtil.rotateToDegrees(bmp, degree);

/**
 * 图片旋转
 * @param tmpBitmap
 * @param degrees
 * @return
 */
public static Bitmap rotateToDegrees(Bitmap tmpBitmap, float degrees) {
    Matrix matrix = new Matrix();
    matrix.reset();
    matrix.setRotate(degrees);
    return tmpBitmap =
            Bitmap.createBitmap(tmpBitmap, 0, 0, tmpBitmap.getWidth(), tmpBitmap.getHeight(), matrix,
                    true);
}

/**
 * 读取照片exif信息中的旋转角度
 * @param path 照片路径
 * @return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;
}

bmpOK就是我们需要的没有旋转过的照片了。