In this tutorial, I will show you how to build a music Player using Flutter. so without further ado let's start it.
Setup the project
First, create a new project, you can do that with Visual studio code or android studio, choose the editor that you feel comfortable with. and now let's add some packages and some file before we code our app
we will need to add this package called audioplayers
audioplayers: ^0.16.1
And now let's create a new Folder and Call it "Assets"
NB: make sure to call it Assets because we will use Audio cache which access to the Assets Folder
Now add the folder path to your pubspec.yaml file and let's start build our app
assets:
- assets/
Now let's start Coding
The Project Source code
import 'package:audioplayers/audio_cache.dart';
import 'package:audioplayers/audioplayers.dart';
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: MusicApp(),
);
}
}
class MusicApp extends StatefulWidget {
@override
_MusicAppState createState() => _MusicAppState();
}
class _MusicAppState extends State<MusicApp> {
//we will need some variables
bool playing = false; // at the begining we are not playing any song
IconData playBtn = Icons.play_arrow; // the main state of the play button icon
//Now let's start by creating our music player
//first let's declare some object
AudioPlayer _player;
AudioCache cache;
Duration position = new Duration();
Duration musicLength = new Duration();
//we will create a custom slider
Widget slider() {
return Container(
width: 300.0,
child: Slider.adaptive(
activeColor: Colors.blue[800],
inactiveColor: Colors.grey[350],
value: position.inSeconds.toDouble(),
max: musicLength.inSeconds.toDouble(),
onChanged: (value) {
seekToSec(value.toInt());
}),
);
}
//let's create the seek function that will allow us to go to a certain position of the music
void seekToSec(int sec) {
Duration newPos = Duration(seconds: sec);
_player.seek(newPos);
}
//Now let's initialize our player
@override
void initState() {
// TODO: implement initState
super.initState();
_player = AudioPlayer();
cache = AudioCache(fixedPlayer: _player);
//now let's handle the audioplayer time
//this function will allow you to get the music duration
_player.durationHandler = (d) {
setState(() {
musicLength = d;
});
};
//this function will allow us to move the cursor of the slider while we are playing the song
_player.positionHandler = (p) {
setState(() {
position = p;
});
};
}
@override
Widget build(BuildContext context) {
return Scaffold(
//let's start by creating the main UI of the app
body: Container(
width: double.infinity,
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topLeft,
end: Alignment.bottomRight,
colors: [
Colors.blue[800],
Colors.blue[200],
]),
),
child: Padding(
padding: EdgeInsets.only(
top: 48.0,
),
child: Container(
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
//Let's add some text title
Padding(
padding: const EdgeInsets.only(left: 12.0),
child: Text(
"Music Beats",
style: TextStyle(
color: Colors.white,
fontSize: 38.0,
fontWeight: FontWeight.bold,
),
),
),
Padding(
padding: EdgeInsets.only(left: 12.0),
child: Text(
"Listen to your favorite Music",
style: TextStyle(
color: Colors.white,
fontSize: 24.0,
fontWeight: FontWeight.w400,
),
),
),
SizedBox(
height: 24.0,
),
//Let's add the music cover
Center(
child: Container(
width: 280.0,
height: 280.0,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(30.0),
image: DecorationImage(
image: AssetImage("assets/image.jpg"),
)),
),
),
SizedBox(
height: 18.0,
),
Center(
child: Text(
"Stargazer",
style: TextStyle(
color: Colors.white,
fontSize: 32.0,
fontWeight: FontWeight.w600,
),
),
),
SizedBox(
height: 30.0,
),
Expanded(
child: Container(
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.only(
topLeft: Radius.circular(30.0),
topRight: Radius.circular(30.0),
),
),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
//Let's start by adding the controller
//let's add the time indicator text
Container(
width: 500.0,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Text(
"${position.inMinutes}:${position.inSeconds.remainder(60)}",
style: TextStyle(
fontSize: 18.0,
),
),
slider(),
Text(
"${musicLength.inMinutes}:${musicLength.inSeconds.remainder(60)}",
style: TextStyle(
fontSize: 18.0,
),
),
],
),
),
Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
IconButton(
iconSize: 45.0,
color: Colors.blue,
onPressed: () {},
icon: Icon(
Icons.skip_previous,
),
),
IconButton(
iconSize: 62.0,
color: Colors.blue[800],
onPressed: () {
//here we will add the functionality of the play button
if (!playing) {
//now let's play the song
cache.play("Stargazer.mp3");
setState(() {
playBtn = Icons.pause;
playing = true;
});
} else {
_player.pause();
setState(() {
playBtn = Icons.play_arrow;
playing = false;
});
}
},
icon: Icon(
playBtn,
),
),
IconButton(
iconSize: 45.0,
color: Colors.blue,
onPressed: () {},
icon: Icon(
Icons.skip_next,
),
),
],
)
],
),
),
),
],
),
),
),
),
);
}
}
Make a Music Player In Flutter
Reviewed by Medics
on
October 28, 2020
Rating:
Reviewed by Medics
on
October 28, 2020
Rating:
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ReplyDeleteHow can i fix this ?
ReplyDeleteThe setter 'durationHandler' isn't defined for the type 'AudioPlayer'.
Try importing the library that defines 'durationHandler', correcting the name to the name of an existing setter, or defining a setter or field named 'durationHandler'.
Have you fixed it?
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ReplyDeleteError: Cannot run with sound null safety, because the following dependencies
ReplyDeletedon't support null safety:
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- package:path_provider
- package:uuid
- package:path_provider_linux
- package:path_provider_windows
- package:path_provider_platform_interface
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For solutions, see https://dart.dev/go/unsound-null-safety
FAILURE: Build failed with an exception.
* Where:
Script 'C:\src\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1005
* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command 'C:\src\flutter\bin\flutter.bat'' finished with non-zero exit value 1
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 21s
Exception: Gradle task assembleDebug failed with exit code 1
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