Reading data from firebaseStore with flutter... SOLUTION! :)

FirebaseStore with Flutter

I spend a lot of time trying to access a specific document from firebase DB with flutter. 

This is some links that help me 

https://stackoverflow.com/questions/53517382/query-a-single-document-from-firestore-in-flutter-cloud-firestore-plugin

https://stackoverflow.com/questions/67575893/the-method-cant-be-unconditionally-invoked-because-the-receiver-can-be-nu

https://stackoverflow.com/questions/69624553/flutter-error-the-operator-isnt-defined-for-the-class-object

I had this error as well 
type '_JsonQuerySnapshot' is not a subtype of type 'Map<String, dynamic>' in type cast"

After 2 days looking for an anserw I got this, the solution...

StreamBuilder(
            stream: FirebaseFirestore.instance
                .collection('YOU COLLECTION NAME')
                .doc('xxxxxxx') //ID OF DOCUMENT 
                .snapshots(),
            builder: (context, snapshot) {
              if (!snapshot.hasData) {
                return new CircularProgressIndicator();
              }
              final document = snapshot.data as DocumentSnapshot;
              return Text(document['DESIRED FIELD OF YOUR DOCUMENT']);