Flutter Setstate inside Listview.builder's builditem function not reloading

Question

I have a streambuilder that loads information from firestore. Then I use a listview.builder to display the information. The displayed information is being called by the function

Answer 1

I solved the issue by turning firstBuildItem widget function into a stateful widget of it's own class. And then passing a key to the function. With this, setState worked without rebuilding the entire streambuilder.

ListView.builder(
                  padding:    EdgeInsets.all(10.0),
                  itemCount:  snapshot.data.documents.length,
                  reverse:    true,
                  controller: listScrollController,
                  itemBuilder: (context, index) =>

                    index == snapLength ?

                    FirstChatBuildMessageItem(
                      key:          Key('counter-${index}'),
                      id:           id,
                      peerAvatar:   peerAvatar,
                      index:        index,
                      mainDocument: snapshot.data.documents[index],
                      listMessage: listMessage,
                    )
                        :

                    //index == 0 ?

                    ChatBuildMessageItem(
                      key:              Key('counter-${index}'),
                      id:               id,
                      peerAvatar:       peerAvatar,
                      index:            index,
                      mainDocument:     snapshot.data.documents[index],
                      previousDocument: snapshot.data.documents[index + 1],
                      listMessage:      listMessage,
                    ),

                ),