Maps showing blank screen when build in release mode - ios

Question

I am building an application where I need to use Flutter maps, everything work as expected, however if I make a build through Jankins for release mode then for some reason the maps on iOS displays blank. I have another page where the same widget is opened in a full page and there it works. My thoughts are that placing google maps in SingleChildScrolView causes the issue. Below I am attaching the source code.I have replaced the SingleChildScrolView with with list view where I pass all widgets as children but the effect is the same, the map is displayed in debug mode but when building through Jankins the map is blank , but on another page the map widget is working as expected.
Any help will be greatly appreciated as I am banging my head for hours.
Regards
class DashboardPage extends StatefulWidget {
final Model _model;
DashboardPage(this._model);
#override
_DashboardPageState createState() => _DashboardPageState();
}
class _DashboardPageState extends State<DashboardPage> {
List<Dossier> _dossiers = List();
_DashboardPageState();
#override
Widget build(BuildContext context) {
return Scaffold(
body: ListView(shrinkWrap: true, children: <Widget>[
_header(StringResources.dashboardTitle),
_mapWidget(),
_header(StringResources.myFiles),
_listWidgets()
],),
);
}
Widget _mapWidget() {
return Container(
height: 300,
child: DossierMap(
compassEnabled: false,
model: widget._model,
onDossierMapViewCreated: _onMapWidgetCreated,
onDossierInfoWindowTap: _selectedMarker,
),
);
}
Widget _listWidgets() {
return StreamBuilder<List<Dossier>>(
initialData: [],
stream: widget._model.dossierService
.loadDossiers(widget._model.loginService.token)
.catchError((e) {
if (widget._model.loggedIn) {
widget._model.forcedServerLogout();
Navigator.of(context).pushReplacement(MaterialPageRoute(
builder: (context) {
return LoginPage(
model: widget._model,
errorText: "",
onLoggedInCallback: (context) => Navigator.of(context)
.pushReplacement(MaterialPageRoute(
builder: (context) => DossiersPage(widget._model))),
);
},
));
}
}).asStream(),
builder: (_context, snapshot) {
if (snapshot.hasData) {
_dossiers = snapshot.data;
return snapshot.data.length != 0
? _buildList(snapshot.data)
: _noDossierContentWidget();
} else if (snapshot.hasError) {
return _progressIndicator();
} else {
return _progressIndicator();
}
});
}
Widget _header(String text) {
return new Container(
decoration: new BoxDecoration(color: Color(ColorResources.darkGray)),
child: Padding(
padding: const EdgeInsets.fromLTRB(20, 12, 0, 12),
child: Align(
alignment: Alignment.centerLeft,
child: Text(text,
overflow: TextOverflow.ellipsis,
style: new TextStyle(
fontWeight: FontWeight.w500,
fontSize: 17,
color: Colors.white))),
),
);
}
void _onMapWidgetCreated(dynamic controller) {
controller.setMarkers(_dossiers);
}
Widget _buildList(List<Dossier> dossierList) {
return Container(
color: Color(ColorResources.dividerColor),
height: 400,
child: ListView.separated(
padding: EdgeInsets.all(0.0),
separatorBuilder: (context, index) =>
Divider(color: Colors.grey.shade300, height: 1.5),
itemCount: dossierList != null ? dossierList.length : 0,
shrinkWrap: true,
physics: ScrollPhysics(),
itemBuilder: (BuildContext context, int index) => DossierListItem(
dossier: dossierList[index],
fromSearch: true,
widget: Icon(
Icons.keyboard_arrow_right,
size: 30,
color: Color(ColorResources.gray),
),
onListItemClickListener: () =>
onListItemClicked(dossierList[index]),
)));
}
void onListItemClicked(Dossier dossier) {
_selectedDossier(dossier);
}
Widget _progressIndicator() {
return Center(child: CircularProgressIndicator());
}
Widget _noDossierContentWidget() {
return Container(
color: Theme.of(context).cardColor,
child: ListTile(
title: Text(
StringResources.noOwnedFiles,
softWrap: true,
maxLines: 3,
overflow: TextOverflow.ellipsis,
style: Theme.of(context).primaryTextTheme.caption,
),
));
}
void _selectedMarker(DossierCluster cluster) async {
if (cluster.isCluster) {
Dossier selected = await showDialog(
context: context,
builder: (context) {
return AlertDialog(
contentPadding: EdgeInsets.fromLTRB(0.0, 20.0, 0.0, 24.0),
title: Center(child: Text(StringResources.selectFile)),
content: SingleChildScrollView(
physics: const AlwaysScrollableScrollPhysics(),
child: Column(
children:
dossiersFromCluster(cluster, onDossierListMarkerClick),
),
),
actions: <Widget>[
FlatButton(
child: Text(StringResources.cancel),
onPressed: () => Navigator.pop(context),
)
],
);
});
if (selected != null) _selectedDossier(selected);
} else {
_selectedDossier(cluster.getFirst);
}
}
List<Widget> dossiersFromCluster(
DossierCluster cluster, Function onDossierListMarkerClick) {
List<Widget> widgets = List();
for (int i = 0; i < cluster.size; i++) {
Dossier dossier = cluster.get(i);
widgets.add(DossierListItem(
dossier: dossier,
fromSearch: false,
widget: Container(),
onListItemClickListener: () => onDossierListMarkerClick(dossier),
));
}
return widgets;
}
void _selectedDossier(Dossier dossier) {
widget._model.setDossier(dossier);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => DossierDetailsPage(widget._model)),
);
}
void _openFullSize() {
Navigator.of(context).push(
MaterialPageRoute(
builder: (context) => FullScreenMapPage(widget._model, _dossiers),
),
);
}
void onDossierListMarkerClick(Dossier dossier) {
widget._model.setDossier(dossier);
Navigator.of(context).push(MaterialPageRoute(
builder: (context) => DossierDetailsPage(widget._model)));
}
}