lib/view/pages/talk/chatDetails/participants/participantsListView.dart

@@ -13,16 +13,23 @@ class ParticipantsListView extends StatefulWidget {
 
 class _ParticipantsListViewState extends State<ParticipantsListView> {
   @override
-  Widget build(BuildContext context) => Scaffold(
+  Widget build(BuildContext context) {
+    final participants = widget.participantsResponse.data.map((participant) => ListTile(
+      leading: UserAvatar(id: participant.actorId),
+      title: Text(participant.displayName),
+      subtitle: participant.statusMessage != null ? Text(participant.statusMessage!) : null,
+    )).toList();
+
+    lastname(participant) => participant.title.toString().split(' ').last;
+    participants.sort((a, b) => lastname(a).compareTo(lastname(b)));
+
+    return Scaffold(
       appBar: AppBar(
         title: const Text('Teilnehmende'),
       ),
       body: ListView(
-        children: widget.participantsResponse.data.map((participant) => ListTile(
+        children: participants,
-            leading: UserAvatar(id: participant.actorId),
-            title: Text(participant.displayName),
-            subtitle: participant.statusMessage != null ? Text(participant.statusMessage!) : null,
-          )).toList(),
       ),
     );
+  }
 }