How to keep my Curved Navigation Bar visible when navigating to another page? - flutter

Question

I'm making this music app and when I click my image of the 3D Perspective PageView, the new page shows up well but the Curved Navigation Bar isn't showing up. I tired to find every resources on the internet but they are all saying about how to redirect with clicking the bottom nav bar.
This is my main.dart file
import 'package:flutter/material.dart';
import 'package:secondlife_mobile/bottomnavbar.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
//title: 'Twitch Player Example',
//title: 'Perspective PageView',
theme: ThemeData(
useMaterial3: true,
),
home: const BottomNavBar(),
);
}
}
And this is my home.dart file.
import 'package:flutter/material.dart';
import 'package:secondlife_mobile/PageViewHolder.dart';
import 'package:provider/provider.dart';
import 'package:secondlife_mobile/screens/artist_1.dart';
import 'package:secondlife_mobile/screens/artist_2.dart';
import 'package:secondlife_mobile/screens/artist_3.dart';
import 'package:secondlife_mobile/screens/artist_4.dart';
import 'package:url_launcher/url_launcher.dart';
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key});
#override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final PageStorageBucket bucket = PageStorageBucket();
late PageViewHolder holder;
late PageController _controller;
double fraction =
0.57; // By using this fraction, we're telling the PageView to show the 50% of the previous and the next page area along with the main page
Future<void> _launchURL(String url) async {
final Uri uri = Uri(scheme: "https", host: url);
if (!await launchUrl(
uri,
mode: LaunchMode.inAppWebView,
)) {
throw 'Can not launch url';
}
}
#override
void initState() {
super.initState();
holder = PageViewHolder(value: 2.0);
_controller = PageController(initialPage: 2, viewportFraction: fraction);
_controller.addListener(() {
holder.setValue(_controller.page);
});
}
int index = 1;
int currentIndex = 0;
final PageController controller = PageController();
List<String> images = [
"https://i.ytimg.com/vi/PWADVtWyE9Q/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLDcneFqOxHd28mCncQxT3jOErmk9Q",
"https://i.ytimg.com/vi/djzDWMy1z7k/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLCHwD_IA2ERzpZVxNvxCEOGr4fyTw",
"https://i.ytimg.com/vi/n8OxyKNBsuQ/hqdefault.jpg?sqp=-oaymwEcCOADEI4CSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAtW45_cxRqEWfUVw19UMts_9Q0lQ",
"https://i.ytimg.com/vi/7bDFD_WcU9I/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAsgAH6VRN4w0HKtVc528WA5QSZ2w",
"https://i.ytimg.com/vi/_ABk7TmjnVk/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAxCeIml0HUbjJ3igi1FFe1esdwdg",
"https://i.ytimg.com/vi/-8m0XFea2zE/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLDBOBRGDJeDjhT1HbRobSN2Tp6hMA",
"https://i.ytimg.com/vi/mXLS2IzZSdg/hq720.jpg?sqp=-oaymwE2CNAFEJQDSFXyq4qpAygIARUAAIhCGAFwAcABBvABAfgB_gmAAtAFigIMCAAQARhdIFsoZTAP&rs=AOn4CLDS13MjaIBxjjhccIktpAb0azBG9g",
"https://i.ytimg.com/vi/HuzlYAMwwJY/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLCmfMS9RENZuIJMQ8k2cf6MbHIpug",
"https://i.ytimg.com/vi/-nt_u4vo-DI/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAgUinltWhU-qqmgc_JroDLPt3OEg",
"https://i.ytimg.com/vi/tqtZIyN_Alg/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLD4woxvyiNXgmSile7PLz7uoRPQOQ",
];
#override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
backgroundColor: const Color.fromARGB(255, 223, 234, 244),
appBar: AppBar(
backgroundColor: Colors.transparent,
centerTitle: true,
title: const Text('AppBar'),
),
body: SingleChildScrollView(
child: SizedBox(
height: MediaQuery.of(context).size.height,
child: Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const SizedBox(
height: 30,
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 35),
child: Text(
'Playlist for you',
style: TextStyle(
fontSize: 20,
fontWeight: FontWeight.w400,
),
),
),
const SizedBox(height: 15),
Container(
child: Center(
child: AspectRatio(
aspectRatio: 1,
child: ChangeNotifierProvider<PageViewHolder>.value(
value: holder,
child: PageView.builder(
controller: _controller,
itemCount: 4,
physics: const BouncingScrollPhysics(),
itemBuilder: (context, index) {
if (index == 0) {
return InkWell(
//you should use InkWell for onTap or thing like that!!!
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => const FirstArtist(),
),
);
},
child: MyPage(
number: index.toDouble(),
fraction: fraction,
),
);
}
if (index == 1) {
return InkWell(
//you should use InkWell for onTap or thing like that!!!
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
const SecondArtist(),
),
);
},
child: MyPage(
number: index.toDouble(),
fraction: fraction,
),
);
}
if (index == 2) {
return InkWell(
//you should use InkWell for onTap or thing like that!!!
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => const ThirdArtist(),
),
);
},
child: MyPage(
number: index.toDouble(),
fraction: fraction,
),
);
}
if (index == 3) {
return InkWell(
//you should use InkWell for onTap or thing like that!!!
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
const FourthArtist(),
),
);
},
child: MyPage(
number: index.toDouble(),
fraction: fraction,
),
);
} else {
return const Text("Can't find anything");
}
},
),
),
),
),
),
Transform.translate(
offset: const Offset(0, -85),
child: const Padding(
padding: EdgeInsets.symmetric(horizontal: 35),
child: Text(
'Watch videos',
style: TextStyle(
fontSize: 17,
fontWeight: FontWeight.w600,
),
),
),
),
//https://www.youtube.com/watch?v=7a_RXHOkJLM
//https://github.com/Programmer9211/Flutter-Carousel-Slider/blob/main/lib/main.dart
Transform.translate(
offset: const Offset(0, -65),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Container(
alignment: Alignment.center,
child: SizedBox(
height: 162,
width: 335,
child: PageView.builder(
controller: controller,
onPageChanged: (index) {
setState(() {
currentIndex = index % images.length;
});
},
itemBuilder: (context, index) {
return InkWell(
//you should use InkWell for onTap or thing like that!!!
onTap: () {
print("Tapped watch Videos Imageeeee");
},
child: Padding(
padding: const EdgeInsets.symmetric(
horizontal: 35),
child: SizedBox(
height: 100,
width: 400,
child: Image.network(
images[index % images.length],
fit: BoxFit.fill,
),
),
),
);
},
),
),
),
],
),
),
////Your Playlist of the week text
Transform.translate(
offset: const Offset(0, -30),
child: const Padding(
padding: EdgeInsets.symmetric(horizontal: 35),
child: Text(
'Playlist of the week',
style: TextStyle(
fontSize: 17,
fontWeight: FontWeight.w600,
),
),
),
),
Transform.translate(
offset: const Offset(0, -15),
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 35),
child: SingleChildScrollView(
child: Column(
children: [
SizedBox(
height: 150,
child: ListView(
scrollDirection: Axis.horizontal,
children: <Widget>[
GestureDetector(
onTap: () {
_launchURL("www.google.com");
},
child: SizedBox(
height: 180.0,
width: 220.0,
child: Image.asset(
'assets/images/album1.jpg',
height: 180.0,
width: 220.0,
),
),
),
const SizedBox(
width: 30,
),
GestureDetector(
onTap: () {
_launchURL("www.google.com");
},
child: SizedBox(
height: 180.0,
width: 220.0,
child: Image.asset(
'assets/images/album2.jpg',
height: 180.0,
width: 220.0,
),
),
),
const SizedBox(
width: 30,
),
GestureDetector(
onTap: () {
_launchURL("www.google.com");
},
child: SizedBox(
height: 160.0,
width: 200.0,
child: Image.asset(
'assets/images/album3.jpg',
height: 160.0,
width: 200.0,
),
),
),
const SizedBox(
width: 30,
),
GestureDetector(
onTap: () {
_launchURL("www.google.com");
},
child: SizedBox(
height: 160.0,
width: 200.0,
child: Image.asset(
'assets/images/album4.jpg',
height: 160.0,
width: 200.0,
),
),
),
const SizedBox(
width: 30,
),
GestureDetector(
onTap: () {
_launchURL("www.google.com");
},
child: SizedBox(
height: 160.0,
width: 200.0,
child: Image.asset(
'assets/images/album5.jpg',
height: 160.0,
width: 200.0,
),
),
),
],
),
),
],
),
),
),
),
],
),
),
),
),
);
}
}
class MyPage extends StatelessWidget {
final number;
final double? fraction;
const MyPage({super.key, this.number, this.fraction});
#override
Widget build(BuildContext context) {
double? value = Provider.of<PageViewHolder>(context).value;
double diff = (number - value);
// diff is negative = left page
// diff is 0 = current page
// diff is positive = next page
//Matrix for Elements
final Matrix4 pvMatrix = Matrix4.identity()
..setEntry(3, 2, 1 / 0.9) //Increasing Scale by 90%
..setEntry(1, 1, fraction!) //Changing Scale Along Y Axis
..setEntry(3, 0, 0.004 * -diff); //Changing Perspective Along X Axis
final Matrix4 shadowMatrix = Matrix4.identity()
..setEntry(3, 3, 1 / 1.6) //Increasing Scale by 60%
..setEntry(3, 1, -0.004) //Changing Scale Along Y Axis
..setEntry(3, 0, 0.002 * diff) //Changing Perspective along X Axis
..rotateX(1.309); //Rotating Shadow along X Axis
return Stack(
fit: StackFit.expand,
alignment: FractionalOffset.center,
children: [
Transform.translate(
offset: const Offset(0.0, -47.5),
child: Transform(
transform: pvMatrix,
alignment: FractionalOffset.center,
child: Container(
decoration: BoxDecoration(boxShadow: [
BoxShadow(
color: Colors.grey.withOpacity(0.5),
blurRadius: 11.0,
spreadRadius: 4.0,
offset: const Offset(
13.0, 35.0), // shadow direction: bottom right
)
]),
child: Image.asset(
"assets/images/image_${number.toInt() + 1}.jpg",
fit: BoxFit.fill),
),
),
),
],
);
}
}

Answer 1

There is a package called persistent_bottom_nav_bar 5.0.2.
Step1: Create a new StatefulWidget called PersistentNavBar that contains the CurvedNavigationBar widget:
Step2: Wrap your entire app with a PageView and set its children to the pages you want to navigate to. For each page, you can set its bottomNavigationBar to the PersistentNavBar widget.