Dart: decode Json from a Firebase snapshot

问题

it's probably a trivial question, I try to decode a json from a Firebase snapshot, here is the structure of the json :

firebaseKey1 : {img1:value1}

firebaseKey2 : {img2:value2}

firebaseKey3 : {img3:value3}

Here is what I tried:

 DatabaseReference firebaseRef = FirebaseDatabase.instance.reference();
 firebaseRef.child('...').once().then((DataSnapshot snapshot) {
      Map<dynamic,dynamic> map = snapshot.value;
      map.forEach((key, jsonString) {
            print('$key: $jsonString'); // jsonString = {img1:value1}

            //how to get value1 inside jsonString?
     });
 });

Any idea?

回答1:

You don't need to json.decode. The returned value is already decoded.

{key1:value1}

is the result of

final Map<String,dynamic> value = {'key1': 'value1'};
print(value.toString());

来源：https://stackoverflow.com/questions/53838388/dart-decode-json-from-a-firebase-snapshot