added the libary

loc_chain_app/lib/main.dart

@@ -1,7 +1,10 @@
 import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 import 'package:loc_chain_app/widgets/navbar.dart';
 
-void main() {
+void main() async {
+  final prefs = await SharedPreferences.getInstance();
+
   runApp(App());
 }
 

loc_chain_app/lib/pages/bluetooth.dart

@@ -0,0 +1,28 @@
+import 'dart:io';
+import 'dart:math';
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:nearby_connections/nearby_connections.dart';
+
+class BluetoothPage extends StatefulWidget {
+  BluetoothPage({Key key, this.title}) : super(key: key);
+  final String title;
+
+  @override
+  _BluetoothPageState createState() => _BluetoothPageState();
+}
+
+class _BluetoothPageState extends State<BluetoothPage> {
+  final String userName = Random().nextInt(10000).toString();
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(widget.title),
+      ),
+      body: Center(),
+    );
+  }
+}

loc_chain_app/lib/pages/settings.dart

@@ -0,0 +1,106 @@
+import 'package:flutter/material.dart';
+import 'package:nearby_connections/nearby_connections.dart';
+
+class SettingsPage extends StatefulWidget {
+  SettingsPage({Key key, this.title}) : super(key: key);
+  final String title;
+
+  @override
+  _SettingsPageState createState() => _SettingsPageState();
+}
+
+class _SettingsPageState extends State<SettingsPage> {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(widget.title),
+      ),
+      body: Center(
+        child: ListView(children: <Widget>[
+          Text(
+            "Permissions",
+          ),
+          Wrap(
+            children: <Widget>[
+              ElevatedButton(
+                child: Text("checkLocationPermission"),
+                onPressed: () async {
+                  if (await Nearby().checkLocationPermission()) {
+                    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+                        content: Text("Location permissions granted :)")));
+                  } else {
+                    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+                        content: Text("Location permissions not granted :(")));
+                  }
+                },
+              ),
+              ElevatedButton(
+                child: Text("askLocationPermission"),
+                onPressed: () async {
+                  if (await Nearby().askLocationPermission()) {
+                    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+                        content: Text("Location Permission granted :)")));
+                  } else {
+                    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+                        content: Text("Location permissions not granted :(")));
+                  }
+                },
+              ),
+              ElevatedButton(
+                child: Text("checkExternalStoragePermission"),
+                onPressed: () async {
+                  if (await Nearby().checkExternalStoragePermission()) {
+                    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+                        content:
+                            Text("External Storage permissions granted :)")));
+                  } else {
+                    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+                        content: Text(
+                            "External Storage permissions not granted :(")));
+                  }
+                },
+              ),
+              ElevatedButton(
+                child: Text("askExternalStoragePermission"),
+                onPressed: () {
+                  Nearby().askExternalStoragePermission();
+                },
+              ),
+            ],
+          ),
+          Divider(),
+          Text("Location Enabled"),
+          Wrap(
+            children: <Widget>[
+              ElevatedButton(
+                child: Text("checkLocationEnabled"),
+                onPressed: () async {
+                  if (await Nearby().checkLocationEnabled()) {
+                    ScaffoldMessenger.of(context).showSnackBar(
+                        SnackBar(content: Text("Location is ON :)")));
+                  } else {
+                    ScaffoldMessenger.of(context).showSnackBar(
+                        SnackBar(content: Text("Location is OFF :(")));
+                  }
+                },
+              ),
+              ElevatedButton(
+                child: Text("enableLocationServices"),
+                onPressed: () async {
+                  if (await Nearby().enableLocationServices()) {
+                    ScaffoldMessenger.of(context).showSnackBar(
+                        SnackBar(content: Text("Location Service Enabled :)")));
+                  } else {
+                    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+                        content: Text("Enabling Location Service Failed :(")));
+                  }
+                },
+              ),
+            ],
+          ),
+        ]),
+      ),
+    );
+  }
+}

loc_chain_app/lib/widgets/navbar.dart

@@ -2,6 +2,9 @@ import 'package:flutter/material.dart';
 import 'package:loc_chain_app/pages/home.dart';
 import 'package:loc_chain_app/pages/keygen.dart';
 
+import '../pages/bluetooth.dart';
+import '../pages/settings.dart';
+
 class NavBarWidget extends StatefulWidget {
   NavBarWidget({Key key}) : super(key: key);
 
@@ -16,9 +19,15 @@ class _NavBarWidgetState extends State<NavBarWidget> {
     HomePage(
       title: 'Home',
     ),
+    BluetoothPage(
+      title: 'Connect',
+    ),
     KeygenPage(
       title: 'RSA Configuration',
     ),
+    SettingsPage(
+      title: 'Settings',
+    )
   ];
   void _onItemTapped(int index) => setState(() {
         _selectedIndex = index;
@@ -35,11 +44,21 @@ class _NavBarWidgetState extends State<NavBarWidget> {
               label: 'Home',
               backgroundColor: Colors.cyan,
             ),
+            BottomNavigationBarItem(
+              icon: Icon(Icons.bluetooth),
+              label: 'Connect',
+              backgroundColor: Colors.cyan,
+            ),
             BottomNavigationBarItem(
               icon: Icon(Icons.lock_rounded),
               label: 'RSA Configuration',
               backgroundColor: Colors.cyan,
             ),
+            BottomNavigationBarItem(
+              icon: Icon(Icons.lock_rounded),
+              label: 'Settings',
+              backgroundColor: Colors.cyan,
+            ),
           ],
           currentIndex: _selectedIndex,
           selectedItemColor: Colors.lightBlueAccent,