CompressObject compressObject = CompressObject(
         imageXFile: imageXFile, //image file
         path: tempDir.path, //compress to path, default Directory.systemTemp.path
         useCache: true, //If there is a cache, no compression will be performed
         toRgb: true, //Convert the image to jpg
         numberOfColors: 128, //the numberOfColors of image.quantize
       );
    Luban.compressImage(compressObject).then((xfile) {
        setState(() {
          print(xfile.path);
        });
    });