Turning String into File or vice versa in Flutter - flutter

Question

I have a little question I have been banging my head on for a few days.
void _loadImage() async {
SharedPreferences saveImage = await SharedPreferences.getInstance();
setState(() {
if (_imagepath == null) {
_imagepath = MemoryImage(kTransparentImage);
}else{
_imagepath = saveImage.getString('imagepath');
}
});
}
So I have this function to save the image to shared preferences, but would like for if else check before it executes that if the path (which is a string) is null, it turns to transparent, and if not, to just regular path. This syntax obviously doesn't work since the String doesn't equal to File:
_imagepath = MemoryImage(kTransparentImage);
Where the _imagepath is a String (a path) and the MemoryImage is a File.
Is there a simple solution to make this work within a function?

Answer 1

If you have to do it in this function then you can do it like this:
ImageProvider _image;
void _loadImage() async {
SharedPreferences saveImage = await SharedPreferences.getInstance();
setState(() {
if (_image == null) {
_image = MemoryImage(kTransparentImage);
} else {
var path = saveImage.getString('imagepath');
var file = File(path);
_image = FileImage(file);
}
});
}
#override
Widget build(BuildContext context) {
return Image(image: _image);
}