颤振中的持久变量

Question

我正在将streambuilder用于聊天应用程序。但是，一旦页面加载，我就会使用一个函数从Firebase检索用户详细信息。它可以正常工作，但是当streambuilder刷新时，它将返回到初始状态，并采用用户详细信息的初始值。 （代码说明如下）：

String myName = "me";       ////Here is where I initialize the variables(ID AND NAME)
String id = '1';
Stream<QuerySnapshot> chats;
TextEditingController messageEditingController = TextEditingController();
bool isLoading = true;

Widget chatMessages() {
return StreamBuilder(
  stream: chats,
  builder: (context, snapshot) {
    return snapshot.hasData
        ? ListView.builder(
            itemCount: snapshot.data.documents.length,
            itemBuilder: (context, index) {
              return MessageTile(
                image: snapshot.data.documents[index].data["imgUrl"],
                message: snapshot.data.documents[index].data["message"],
                sendByMe:
                    myName == snapshot.data.documents[index].data["sendBy"],  ////////This variable for name work fine when the screen loads but as soon as the stream refreshes, it takes the value from where it was initialized (Line 1 and 2). How do I get it to use only the value I get from the function?
              );
            })
        : Center(
            child: CupertinoActivityIndicator(
            radius: 18,
          ));
  },
);
}
@override
void initState() {
getUserDetails();               /////function called inside init
setState(() {
  isLoading = false;
});                                
super.initState();
}

void getUserDetails() async {                        //////Here is where I fetch the user details.
UserModel user = await AuthService().getUser();
id = user.iD;
myName = user.name;
}