android獲取圖片的旋轉角度

public static int getExifOrientation(String filepath) {
    int degree = 0;
    ExifInterface exif = null;
    try {
        exif = new ExifInterface(filepath);
    } catch (IOException ex) {
    	Log.d(TAG, "cannot read exif" + ex);
    }
    if (exif != null) {
	int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, -1);
        if (orientation != -1) {
            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;
            }
        }
    }
    return degree;
}

android獲取圖片的旋轉角度