_cropImage(filePath) async {
final croppedImage = await ImageCropper().cropImage(sourcePath: filePath, maxHeight: 1080, maxWidth: 1080);
if (croppedImage != null) {
_image = croppedImage as File?;
setState(() {});
}
}

Container(
child: _image != null
? Image.file(_image!, width: 300, height: 300, fit: BoxFit.cover,)
: Image.network('http://gezilecekyerler.com/wp-content/uploads/2017/03/van.jpg'),
),