Develop Reference

Flutter app(android) not working on real device in release mode

I've been building a demo app to practice flutter, the app's running perfectly fine in the emulator as well as on real devices when connected. But now, I've been trying to run the APK file on my mobile and it seems to not work. I can log in to the app meaning the internet permission is working. But when it comes to the home screen which pulls data from a server, the app does not work. Maybe there's something wrong in the code relevant, but I can't seem to fix it.
I've attached the code for the home screen as well, the provider part is the thing that is having issues. AND ALSO THE DATABASE HAS THE DATA MEANING THE LIST IS NOT EMPTY AT ALL
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import './new_enquiry_screen.dart';
import '../providers/enquiries_provider.dart';
import '../screens/new_enquiry_screen.dart';
import '../widgets/drawer_widget.dart';
import '../widgets/follow_up_list_tile_widget.dart';
class EnquiryScreen extends StatelessWidget {
const EnquiryScreen({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return DefaultTabController(
length: 3,
child: Scaffold(
drawer: DrawerWidget(),
appBar: AppBar(
bottom: const TabBar(
tabs: [
Tab(text: 'Follow Ups'),
Tab(text: 'Leads'),
Tab(text: 'Past'),
],
),
title: Text(
'Enquiries',
),
backgroundColor: Theme.of(context).primaryColor,
),
body: TabBarView(
children: [
ChangeNotifierProvider<EnquiriesProvider>.value(
value: EnquiriesProvider(),
child: Consumer<EnquiriesProvider>(
builder: (_, provider, child) {
int length = provider.enquiries.length;
return length == 0
? Center(
child: CircularProgressIndicator(),
)
: ListView.builder(
itemCount: length,
itemBuilder: (_, index) {
return FollowUpListTileWidget(
provider.enquiries.elementAt(index),
);
},
);
},
),
),
const Center(
child: Text('Leads Up'),
),
const Center(
child: Text('Past Up'),
),
],
),
floatingActionButton: FloatingActionButton(
backgroundColor: Theme.of(context).primaryColor,
onPressed: () {
Navigator.of(context).pushNamed(NewEnquiryScreen.routeName);
},
child: Icon(
Icons.add,
color: Theme.of(context).accentColor,
size: 30,
),
),
),
);
}
}
import 'package:flutter/material.dart';
import '../models/enquiry.dart';
class FollowUpListTileWidget extends StatelessWidget {
const FollowUpListTileWidget(this._enquiry, {Key? key}) : super(key: key);
final Enquiry _enquiry;
#override
Widget build(BuildContext context) {
return Card(
elevation: 10,
margin: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 5.0),
child: ListTile(
leading: CircleAvatar(
child: Text(
_enquiry.name.characters.first.toUpperCase(),
style: TextStyle(
color: Theme.of(context).accentColor,
),
),
backgroundColor: Theme.of(context).primaryColor,
),
title: Text(_enquiry.name),
subtitle: FittedBox(child: Text(_enquiry.email)),
trailing: Row(
mainAxisSize: MainAxisSize.min,
children: [
IconButton(
color: Theme.of(context).primaryColor,
onPressed: () {},
icon: const Icon(
Icons.phone,
),
),
IconButton(
color: Theme.of(context).primaryColor,
onPressed: () {},
icon: const Icon(Icons.whatsapp),
),
IconButton(
color: Theme.of(context).primaryColor,
onPressed: () {},
icon: const Icon(Icons.edit),
),
],
),
),
);
}
}

try to run app in debug mode in real device, if it is working then check in manifest file you have given internet permission or not inside android/app/main/AndroidManifest.xml by default in debug mode internet permission is already exits and most important please remove all caps from your question title as it is very difficult to read.

How can i navigate to several new pages using the bottom navigation bar in flutter?

I want to navigate to several new pages using my bottom navigation bar in flutter.
I tried several methods to achieve my requirement. But still neither of them worked out for me. I have attached my relevant entire source code below for a better understanding.
Thank you in advance. :)
Dart Source Code :
class dashboard extends StatefulWidget {
#override
_dashboardState createState() => _dashboardState();
}
// ignore: camel_case_types
class _dashboardState extends State<dashboard> {
#override
Widget build(BuildContext context) {
final authService = Provider.of<AuthService>(context);
return Scaffold(
body: SingleChildScrollView(
child: Column(
children: <Widget>[
Padding(
padding: const EdgeInsets.only(top: 80.0, right: 250),
child: Center(
child: Container(
width: 200.0,
height: 20.0,
decoration:
BoxDecoration(borderRadius: BorderRadius.circular(15.0)),
child: (const Text(
'Hello',
textAlign: TextAlign.center,
style: TextStyle(
fontWeight: FontWeight.bold, color: Colors.black),
)),
),
),
),
Padding(
padding: const EdgeInsets.only(top: 20.0),
child: MaterialButton(
onPressed: () {
Navigator.push(context,
MaterialPageRoute(builder: (context) => profile()));
},
child: const Text('Test'),
),
),
Padding(
padding: EdgeInsets.only(left: 300.0, top: 10.0),
child: IconButton(
icon: new Icon(Icons.notifications),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Notifications(),
),
);
},
),
),
Padding(
padding: const EdgeInsets.only(top: 1.0),
child: Center(
child: Container(
width: 390,
height: 450,
decoration: BoxDecoration(
color: Colors.green.shade100,
borderRadius: BorderRadius.circular(10.0)),
),
),
),
],
),
),
floatingActionButton: FloatingActionButton(onPressed: () async {
await authService.signOut();
}),
// : _children[_currentIndex],
bottomNavigationBar: BottomNavigationBar(
type: BottomNavigationBarType.fixed,
items: const [
BottomNavigationBarItem(
icon: Icon(Icons.book_online),
label: 'Page 1',
),
BottomNavigationBarItem(
icon: Icon(Icons.read_more),
label: 'Page 2',
),
BottomNavigationBarItem(
icon: Icon(Icons.account_circle),
label: 'Page 3',
),
],
),
);
}
}

There are many propositions, this is one :
first, you begin by adding a variable index to know where you are. then add a function to change the content of this variable.
class _dashboardState extends State< dashboard > {
int currentIndex = 1;
changeIndex(index) {
setState(() {
currentIndex = index;
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: WillPopScope(
child: (currentIndex == 1)
? HomeScreen()
: (currentIndex == 2)
? Screen2()
: (currentIndex == 3)
? Screen3()
: Settings(),
onWillPop: () async {
bool backStatus = onWillPop();
if (backStatus) {
exit(0);
}
return false;
},
),
then link it to the navbar button.
bottomNavigationBar: BottomNavigationBar(
type: BottomNavigationBarType.fixed,
items: const [
InkWell(
onTap: () => changeIndex(1),
child: BottomNavigationBarItem(
icon: Icon(Icons.book_online),
label: 'Page 1',
),
.....
],
),

How can I use same navigation route I used for bottomnavigationbar in drawer widget in flutter?

I already have a bottom navigation bar which navigates to different pages.
then I add a drawer which I want it to change the widget in the body only, but the issue is that I made the drawer in another page and I called it, so it is not responding or I'm not calling it perfectly as I should.
Below is the navigation for the bottomnavigationbar, I have imported all necessary files
class HomePage extends StatefulWidget {
#override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
int currentTab = 0;
final tabs = [
IndexPage(),
Save(),
Invest(),
Wallet(),
Cards(),
];
#override
Widget build(BuildContext context) {
return MaterialApp(
color: Colors.grey[900],
debugShowCheckedModeBanner: false,
title: 'Flochristos App',
theme: ThemeData(),
home: Scaffold(
backgroundColor: Colors.black,
resizeToAvoidBottomPadding: false,
resizeToAvoidBottomInset: false,
key: _scaffoldKey,
appBar: AppBar(
backgroundColor: Colors.grey[900],
title: Text(
'PettySave',
style: TextStyle(color: Colors.white, fontWeight: FontWeight.bold),
),
actions: <Widget>[
IconButton(
icon: Icon(Icons.brightness_7_outlined),
onPressed: () {},
),
IconButton(
icon: Icon(Icons.keyboard_arrow_down_sharp),
onPressed: () {},
),
IconButton(
icon: Icon(Icons.account_circle_rounded),
onPressed: () {},
),
],
//shadowColor: Colors.grey,
),
body: tabs[currentTab], //this is where I want to change the pages
floatingActionButtonLocation: FloatingActionButtonLocation.endFloat,
bottomNavigationBar: BottomNavigationBar(
onTap: (int index) {
setState(() {
currentTab = index;
});
},
currentIndex: currentTab,
backgroundColor: Colors.grey[900],
unselectedIconTheme: IconThemeData(color: Colors.grey),
selectedItemColor: Colors.green,
unselectedItemColor: Colors.grey,
type: BottomNavigationBarType.fixed,
items: [
BottomNavigationBarItem(
icon: Icon(Icons.home_filled),
// ignore: deprecated_member_use
title: Text(
"Home",
),
),
BottomNavigationBarItem(
icon: FaIcon(FontAwesomeIcons.pagelines),
// ignore: deprecated_member_use
title: Text(
"Save",
),
),
BottomNavigationBarItem(
icon: Icon(Icons.trending_up),
// ignore: deprecated_member_use
title: Text(
"Invest",
),
),
BottomNavigationBarItem(
icon: Icon(Icons.account_balance_wallet_outlined),
// ignore: deprecated_member_use
title: Text(
"Wallet",
),
),
BottomNavigationBarItem(
icon: Icon(Icons.credit_card),
// ignore: deprecated_member_use
title: Text(
"Cards",
),
),
],
),
),
);
}
}
}
that's the main.dart code
body: tabs[currentTab], //this is where I want to change the pages
then I created another page for drawer which I called all appropriate pages
from one of the list style in the slidedrawer.dart , I'm trying to set currentTab to any index I want.... but it's not working.
ListTile(
contentPadding: EdgeInsets.fromLTRB(30, 0, 0, 0),
leading: Icon(
Icons.trending_up,
color: Colors.grey[500],
),
title: Text(
'Investments',
style: TextStyle(
color: Colors.grey[300],
fontWeight: FontWeight.bold,
),
),
onTap: () {
setState(() {
currentTab = 1;
});
},
),
I want the index to turn to Save()

List<Widget> tabs = [
IndexPage(),
Save(),
Invest(),
Wallet(),
Cards(),
];

There are many ways to add a drawer to an app, but the most common one is to use the drawer property thats within the Scaffold() Widget.
e.x.
Scaffold(
appBar: AppBar(
...
),
drawer: Drawer() // This is where you call the new Widget(class) that you made the drawer in
body: tabs[currentTab],
);
This is how I understood your question, correct me if I misunderstood it.
This is an example how I used a navigation tab bar in one of my projects.
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../../../providers/auth.dart';
import '../../../widgets/auth/admin/main_drawer.dart';
import '../../auth/profile_screen.dart';
import '../../home_screen.dart';
import './../projects_screen.dart';
class AdminTabBarScreen extends StatefulWidget {
static const routeName = 'auth-tab-bar-view';
#override
_AdminTabBarScreenState createState() => _AdminTabBarScreenState();
}
class _AdminTabBarScreenState extends State<AdminTabBarScreen>
with SingleTickerProviderStateMixin {
TabController _tabController;
#override
void initState() {
_tabController = TabController(length: 3, vsync: this);
super.initState();
}
#override
void dispose() {
_tabController.dispose();
super.dispose();
}
#override
Widget build(BuildContext context) {
final auth = Provider.of<Auth>(context);
return Scaffold(
// appBar: AppBar(
// title: Text('SHTEGU'),
// ),
extendBody: true,
drawer: MainDrawer(), // this is where I called my drawer
body: Container(
// color: Colors.blueAccent,
child: TabBarView(
children: <Widget>[
HomeScreen(),
ProjectsScreen(),
ProfileScreen(),
// LoginScreen(),
],
controller: _tabController,
),
),
bottomNavigationBar: Container(
padding: EdgeInsets.all(16.0),
child: ClipRRect(
borderRadius: BorderRadius.all(
Radius.circular(50.0),
),
child: Container(
color: Colors.black26,
child: TabBar(
labelColor: Color(0xFFC41A3B),
unselectedLabelColor: Colors.white,
labelStyle: TextStyle(fontSize: 13.0),
indicator: UnderlineTabIndicator(
borderSide: BorderSide(color: Colors.black54, width: 0.0),
insets: EdgeInsets.fromLTRB(50.0, 0.0, 50.0, 40.0),
),
//For Indicator Show and Customization
indicatorColor: Colors.black54,
tabs: <Widget>[
Tab(
text: 'Home',
),
Tab(
text: 'Projects',
),
Tab(
text: 'Profile',
),
// Tab(
// text: 'Login',
// ),
],
controller: _tabController,
),
),
),
),
);
}
}
Here is how I called the class above to check if admin
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../../screens/auth/admin/admin_tab_bar_screen.dart';
import '../../screens/auth/user_tab_bar_screen.dart';
import '../../providers/auth.dart';
class AuthTabBarScreen extends StatelessWidget {
static const routeName = 'auth-tab-bar-view';
#override
Widget build(BuildContext context) {
return FutureBuilder(
future: Provider.of<Auth>(context, listen: false).isAdmin(),
builder: (context, snapshot) => snapshot.hasData
? snapshot.data
? AdminTabBarScreen()
: UserTabBarScreen()
: CircularProgressIndicator(), // while you're waiting for the data, show some kind of loading indicator
);
}
}
And here is my drawer:
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../../../screens/auth/admin/register_user_screen.dart';
import '../../../screens/auth/auth_tab_bar_screen.dart';
import '../../../screens/tab_bar_screen.dart';
import '../../../providers/auth.dart';
class MainDrawer extends StatelessWidget {
Widget buildListTile(
String title, IconData icon, Function tapHandler, BuildContext ctx) {
return ListTile(
tileColor: Color(0xffF2F7FB),
selectedTileColor: Theme.of(ctx).accentColor,
leading: Icon(
icon,
size: 26,
color: Theme.of(ctx).primaryColor,
),
title: Text(
title,
style: TextStyle(
fontFamily: 'RobotoCondensed',
fontSize: 16,
fontWeight: FontWeight.bold,
color: Theme.of(ctx).primaryColor,
),
),
onTap: tapHandler,
);
}
#override
Widget build(BuildContext context) {
final authData = Provider.of<Auth>(context, listen: false);
return Drawer(
child: SafeArea(
child: SingleChildScrollView(
child: Column(
children: <Widget>[
buildListTile(
'Home',
Icons.home_rounded,
() {
Navigator.of(context)
.pushReplacementNamed(AuthTabBarScreen.routeName);
},
context,
),
buildListTile(
'Add user',
Icons.person_add_alt_1_rounded,
() {
// Navigator.of(context).pop();
Navigator.of(context)
.pushReplacementNamed(RegisterUserScreen.routeName);
},
context,
),
buildListTile(
'Sign Out',
Icons.exit_to_app_rounded,
() {
authData.signOut();
},
context,
),
],
),
),
),
);
}
}
Hope this is at least of help to you :D

I need to add colors to my appDrawer it is like header part and bottom part

I created an app drawer and now I need to add color to its background. I managed to add color to the header part now I'm struggling to add to the bottom part. My color choices are RED and Golden Yellow. I am a little bit new to flutter and still learning through by making this kind of projects. And if you have any suggestions regarding making app drawer like this or any other ways I like to know those too.
Here is my appDrawer.dar code
import 'package:flutter/material.dart';
class NavDrawer extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Drawer(
elevation: 20.0,
child: ListView(
padding: EdgeInsets.zero,
children: [
DrawerHeader(
child: Text(
'Hello Welcome!',
style: TextStyle(color: Colors.white, fontSize: 25),
),
decoration: BoxDecoration(
color: Color.fromRGBO(225, 223, 0, 100),
)),
ListTile(
leading: Icon(Icons.input),
title: Text('Welcome'),
onTap: () => {},
),
ListTile(
leading: Icon(Icons.verified_user),
title: Text('Profile'),
onTap: () => {Navigator.of(context).pop()},
),
ListTile(
leading: Icon(Icons.settings),
title: Text('Settings'),
onTap: () => {Navigator.of(context).pop()},
),
ListTile(
leading: Icon(Icons.border_color),
title: Text('Feedback'),
onTap: () => {Navigator.of(context).pop()},
),
ListTile(
leading: Icon(Icons.exit_to_app),
title: Text('Logout'),
onTap: () => {Navigator.of(context).pop()},
),
],
),
);
}
}
I cold it likes this in my homeScreen.dart file
#override
Widget build(BuildContext context) {
return Scaffold(
extendBodyBehindAppBar: true, //this will extend map over the app bar
drawer: NavDrawer(),
appBar: AppBar(
centerTitle: true,
title: Text(
'MY ORDERS',
style: TextStyle(color: Colors.black, fontSize: 25.0),
),

You can wrap your widgets with container and give them a color property
Container(
color:Colors.red,
child:ListView(
padding: EdgeInsets.zero,
children: [
DrawerHeader(
child: Text(
'Hello Welcome!',
style: TextStyle(color: Colors.white, fontSize: 25),
),
decoration: BoxDecoration(
color: Color.fromRGBO(225, 223, 0, 100),
)),
ListTile(
leading: Icon(Icons.input),
title: Text('Welcome'),
onTap: () => {},
),
ListTile(
leading: Icon(Icons.verified_user),
title: Text('Profile'),
onTap: () => {Navigator.of(context).pop()},
),
ListTile(
leading: Icon(Icons.settings),
title: Text('Settings'),
onTap: () => {Navigator.of(context).pop()},
),
ListTile(
leading: Icon(Icons.border_color),
title: Text('Feedback'),
onTap: () => {Navigator.of(context).pop()},
),
ListTile(
leading: Icon(Icons.exit_to_app),
title: Text('Logout'),
onTap: () => {Navigator.of(context).pop()},
),
],
),
)

You can wrap your listview into a container and give color to that container. In that way, the color will be applied to the other items as well.

Navigate using bottom app bar tabs - flutter

I am using bottom app bar for bottomnavigation in flutter. when tapped on one of the tab in the bottom app bar, i would still want the bottom app bar and app bar to remain as it is in it's fixed position but only the body content changes based on what is tapped.
I have tried to use push() method but it gives me a new page instead with a back button.
Navigation_tabs.dart:
import 'package:flutter/material.dart';
class NavigationTabs extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new Scaffold(
floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
floatingActionButton: FloatingActionButton(
child: const Icon(Icons.add),
onPressed: () {},
),
appBar: AppBar(
title: Text('Dashboard'),
),
bottomNavigationBar: BottomAppBar(
shape: CircularNotchedRectangle(),
notchMargin: 4.0,
child: new Row(
mainAxisSize: MainAxisSize.min,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
IconButton(
icon: Icon(
Icons.home,
color: Colors.cyan[700],
),
onPressed: () {},
),
new Container(
padding: EdgeInsets.only(left: 20),
child: IconButton(
icon: Icon(
Icons.list,
color: Colors.cyan[700],
),
onPressed: () => Navigator.pushNamed(context, '/login'),
)),
new Container(
padding: EdgeInsets.only(left: 120),
child: IconButton(
icon: Icon(
Icons.explore,
color: Colors.cyan[700],
),
onPressed: () {},
)),
new Container(
height: 22.0,
child: new RawMaterialButton(
onPressed: () {},
child: new Icon(
Icons.person,
color: Colors.white,
size: 20.0,
),
shape: new CircleBorder(),
elevation: 1.0,
fillColor: Colors.cyan[700],
))
],
),
));
}
}
I want to be able to only make the page content change without a back button instead of going to a completely new page when one of the tabs is pressed.

You can use a BottomNavigationBarItem instead of creating buttons and use the ontap of the bottomNavigationBar.
class _MyHomePageState extends State<MyHomePage> {
int _index = 0;
final List<Widget> _children = [
Center(child: Text("First Page"),),
Center(child: Text("Second Page"),),
Center(child: Text("Third Page"),)
];
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Bottom Navigation"),
),
body: Center(
child: (_children[_index ]),
),
bottomNavigationBar: BottomNavigationBar(
onTap: onTabTapped,
currentIndex: _currentIndex,
items: [
BottomNavigationBarItem(
icon: Icon(Icons.looks_one),
title: Text('First'),
),
BottomNavigationBarItem(
icon: Icon(Icons.looks_two),
title: Text('Second'),
),
BottomNavigationBarItem(
icon: Icon(Icons.looks_3),
title: Text('Third'),
)
],
),
);
}
void onTabTapped(int index) {
setState(() {
_index = index;
});
}
}
For more detailed explanation:
Flutter documentation