Added settings page

lib/api/list_implementation.dart

@@ -76,4 +76,14 @@ class ListAPIService extends APIService implements ListService {
   void setDisplayDoneTasks(int listId, String value) {
     _storage.write(key: "display_done_tasks_list_$listId", value: value);
   }
+
+  @override
+  Future<String> getDefaultList() {
+    return _storage.read(key: "default_list_id");
+  }
+
+  @override
+  void setDefaultList(int listId) {
+    _storage.write(key: "default_list_id", value: listId.toString());
+  }
 }

lib/pages/home.dart

@@ -10,6 +10,7 @@ import 'package:vikunja_app/pages/namespace/namespace_edit.dart';
 import 'package:vikunja_app/pages/placeholder.dart';
 import 'package:vikunja_app/global.dart';
 import 'package:vikunja_app/models/namespace.dart';
+import 'package:vikunja_app/pages/settings.dart';
 
 class HomePage extends StatefulWidget {
   @override
@@ -64,6 +65,13 @@ class HomePageState extends State<HomePage> with AfterLayoutMixin<HomePage> {
           VikunjaGlobal.of(context).logoutUser(context);
         },
       ),
+      ListTile(
+        title: Text('Settings'),
+        leading: Icon(Icons.settings),
+        onTap: () {
+          Navigator.push(context, MaterialPageRoute(builder: (context) => SettingsPage()));
+        },
+      )
     ]);
   }
 

lib/pages/settings.dart

@@ -0,0 +1,42 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import 'package:vikunja_app/global.dart';
+import 'package:vikunja_app/models/list.dart';
+
+class SettingsPage extends StatefulWidget {
+  @override
+  State<StatefulWidget> createState() => SettingsPageState();
+
+}
+
+class SettingsPageState extends State<SettingsPage> {
+  List<TaskList> taskListList;
+  int defaultList;
+
+  @override
+  Widget build(BuildContext context) {
+    if(taskListList == null)
+      VikunjaGlobal.of(context).listService.getAll().then((value) => setState(() => taskListList = value));
+    if(defaultList == null)
+      VikunjaGlobal.of(context).listService.getDefaultList().then((value) => setState(() => defaultList = value == null ? null : int.tryParse(value)));
+    return new Scaffold(
+      appBar: AppBar(title: Text("Settings"),),
+      body: Column(
+        children: [
+          taskListList != null ?
+          ListTile(
+            title: Text("Default List"),
+            trailing: DropdownButton(
+              items: taskListList.map((e) => DropdownMenuItem(child: Text(e.title), value: e.id)).toList(),
+              value: defaultList,
+              onChanged: (value){
+                setState(() => defaultList = value);
+                VikunjaGlobal.of(context).listService.setDefaultList(value);
+                },
+            ),) : ListTile(title: Text("..."),)
+        ],
+      ),
+    );
+  }
+
+}

lib/service/services.dart

@@ -22,6 +22,8 @@ abstract class ListService {
   Future delete(int listId);
   Future<String> getDisplayDoneTasks(int listId);
   void setDisplayDoneTasks(int listId, String value);
+  Future<String> getDefaultList();
+  void setDefaultList(int listId);
 }
 
 abstract class TaskService {