我激动不已。我想在应用程序中插入音频播放,但它不起作用。我正在使用图书馆
“assets_audio_layer:^3.1.1”
因为我的课
'无状态小工具'
。我认为错误的原因是
柔性空格键
小部件,但我没有解决方案。当我运行此代码时,出现以下错误:
'断言失败:第464行位置12:'needsCompositioning':不为true。"
错误
The following assertion was thrown during paint():
'package:flutter/src/material/flexible_space_bar.dart': Failed assertion: line 464 pos 12: 'needsCompositing': is not true.
Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
https://github.com/flutter/flutter/issues/new?template=2_bug.yml
The relevant error-causing widget was:
FlexibleSpaceBar FlexibleSpaceBar:file:///C:/Users/ruama.patricio/AndroidStudioProjects/shopping/lib/pages/course.page.dart:131:30
When the exception was thrown, this was the stack:
#2 _RenderFlexibleSpaceHeaderOpacity.paint (package:flutter/src/material/flexible_space_bar.dart:464:12)
#3 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:3155:7)
#4 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:252:13)
#5 RenderBoxContainerDefaultsMixin.defaultPaint (package:flutter/src/rendering/box.dart:2875:15)
#6 RenderStack.paintStack (package:flutter/src/rendering/stack.dart:639:5)
#7 PaintingContext.pushClipRect.<anonymous closure> (package:flutter/src/rendering/object.dart:535:83)
#8 ClipContext._clipAndPaint (package:flutter/src/painting/clip.dart:25:12)
#9 ClipContext.clipRectAndPaint (package:flutter/src/painting/clip.dart:53:5)
密码
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:assets_audio_player/assets_audio_player.dart';
var url = 'https://www.kozco.com/tech/LRMonoPhase4.mp3';
final audioo = AssetsAudioPlayer();
playAudiofromAssets() {
print("Played");
audioo.open(
Audio('assets/audios/ash.mp3'),
);
audioo.playOrPause();
}
playAudiofromInt() {
print("p");
audioo.open(Audio.network(url));
}
stopAudio() {
audioo.pause();
}
class CheckboxProvider with ChangeNotifier {
bool _isChecked = false;
bool get isChecked => _isChecked;
set isChecked(bool value) {
_isChecked = value;
notifyListeners();
}
}
class CheckboxProviderAudio with ChangeNotifier {
bool _isCheckedAudio = false;
bool get isCheckedAudio => _isCheckedAudio;
set isCheckedAudio(bool value) {
_isCheckedAudio = value;
notifyListeners();
}
}
class CoursePage extends StatelessWidget {
final String image;
final String title;
final String description;
final String logo;
final String details;
final String company;
CoursePage({
required this. title,
required this.description,
required this.image,
required this.logo,
required this.details,
required this.company,
});
@override
Widget build(BuildContext context) {
return Scaffold(
body: NestedScrollView(
headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled){
return <Widget>[
SliverAppBar(
leadingWidth: 400,
leading: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisSize: MainAxisSize.max,
children: <Widget>[
Flexible(
child: Padding(
padding: const EdgeInsets.only(right:4),
child: InkWell(
onTap: () {
Navigator.pop(context);
},
child: Ink.image(
image: AssetImage("assets/item-voltar.png"),
width: 40,
height: 40,
fit: BoxFit.fill,
),
),
),
),
Spacer(),
Flexible(
child: Padding(
padding: const EdgeInsets.only(right: 0),
child: InkWell(
onTap: () {
// Navigator.pop(context);
},
child: Ink.image(
image: AssetImage("assets/component.png"),
width: 80,
height: 40,
fit: BoxFit.fill,
),
),
),
),
],
),
backgroundColor: Colors.white.withOpacity(0),
elevation: 0.0,
expandedHeight: 500.0,
floating: false,
flexibleSpace: FlexibleSpaceBar(
centerTitle: true,
background: Hero(
tag: image,
child: Image.asset(
image,
width: double.infinity,
fit: BoxFit.fitWidth,
),
),
),
),
];
},
body:ListView(
children: <Widget> [
Row(
children: [
SizedBox(
width: 10,
),
Flexible(
child: Padding(
padding: const EdgeInsets.only(right: 0),
child: InkWell(
onTap: () {
// Navigator.pop(context);
},
child: Ink.image(
image: AssetImage("assets/item-compartilhar.png"),
width: 40,
height: 40,
fit: BoxFit.fill,
),
),
),
),
Padding(
padding: EdgeInsets.all(10),
child: Text(description,
style: TextStyle(
fontSize: 20,
),),
),
Text(" Por: "),
Image.asset(logo, width: 50, height: 50,),
],
),
Padding(
padding: EdgeInsets.only(
top: 10,
left: 10,
right: 10
),
child: Text(
title,
style: TextStyle(
fontSize: 26,
fontWeight: FontWeight.bold,
),
),
),
SizedBox(
height: 10,
),
Row(
children: [
SizedBox(width: 10),
Icon(Icons.account_balance),
Padding(
padding: EdgeInsets.all(10),
child: Text(
company,
),
),
],
),
SizedBox(
height: 10,
),
Padding(
padding: EdgeInsets.all(10),
child: Text(
"Sobre",
style: TextStyle(
fontWeight: FontWeight.bold,
),
),
),
Padding(
padding: EdgeInsets.all(10),
child: Text(
details,
),
),
Row(children: [
Flexible(
child: Column(
children: <Widget>[ description == " Curso"
? Row(
children: [
ChangeNotifierProvider(
create: (_) => CheckboxProvider(),
child: Consumer<CheckboxProvider>(
builder: (context, checkboxProvider, _) => Checkbox(
value: checkboxProvider.isChecked,
onChanged: (value) {
checkboxProvider.isChecked = value ?? true;
},
),
),
),
Text(
"Fiz esse curso",
style: TextStyle(
fontWeight: FontWeight.bold,
),
),
],
)
:Row(
children: [
ChangeNotifierProvider(
create: (_) => CheckboxProviderAudio(),
child: Consumer<CheckboxProviderAudio>(
builder: (context, checkboxProviderAudio, _) => Checkbox(
value: checkboxProviderAudio.isCheckedAudio,
onChanged: (value) {
checkboxProviderAudio.isCheckedAudio = value ?? true;
},
),
),
),
Text(
"Já ouvi esse tutorial",
style: TextStyle(
fontWeight: FontWeight.bold,
),
),
],
)
],
)
),
],
),
Padding(
padding: EdgeInsets.all(10),
child: Column(
children: <Widget>[ description == " Curso"
?
Container(
height: 200,
width: 400,
/* decoration: BoxDecoration(
color: Theme.of(context).primaryColor,
borderRadius: BorderRadius.all(
Radius.circular(50),
),
),*/
margin: EdgeInsets.only(right: 20),
child: Column(
children: [
Flexible(child: TextButton(
child: Row(
children: [
Icon(Icons.link, color: Colors.white,),
Text(
"Tenho Interesse",
textAlign: TextAlign.center,
style: Theme.of(context).textTheme.displayMedium,
),
],
),
style: const ButtonStyle(
backgroundColor: MaterialStatePropertyAll(Colors.cyan),
),
onPressed: () => {},
),
),
Flexible(child:
TextButton(
child: Row(
children: [
Icon(Icons.calendar_month, color: Colors.white,),
Text(
"Adicionar ao calendário",
textAlign: TextAlign.center,
style: Theme.of(context).textTheme.displayMedium,
),
],
),
style: const ButtonStyle(
backgroundColor: MaterialStatePropertyAll(Colors.lightBlueAccent),
),
onPressed: () => {},
),
)
],
),
)
: Text("Ãudio Player"),
Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Column(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Text(
"PLAY AUDIO FROM ASSET",
style: TextStyle(
color: Colors.white,
fontSize: 20,
fontWeight: FontWeight.bold),
),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
TextButton.icon(
onPressed: playAudiofromAssets,
style: TextButton.styleFrom(
foregroundColor: Colors.grey[100],
),
icon: Icon(Icons.play_arrow),
label: Text(""),
),
Spacer(),
TextButton.icon(
onPressed: stopAudio,
style: TextButton.styleFrom(
foregroundColor: Colors.grey[100],
),
icon: Icon(Icons.pause),
label: Text(""),
),
],
),
Spacer(),
Text(
"PLAY AUDIO FROM INTERNET",
style: TextStyle(
color: Colors.white,
fontSize: 20,
fontWeight: FontWeight.bold),
),
Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
TextButton.icon(
//onPressed:(){},
onPressed: () async {
await audioo.open(Audio.network(url));
},
style: TextButton.styleFrom(
foregroundColor: Colors.grey[100],
),
icon: Icon(Icons.play_arrow),
label: Text(""),
),
Spacer(),
TextButton.icon(
onPressed:stopAudio,
style: TextButton.styleFrom(
foregroundColor: Colors.grey[100],
),
icon: Icon(Icons.pause),
label: Text(""),
),
],
),
],
),
],
)
],
),
),
],
),
),
);
}
}
我想解决这个问题,或者找到一个新的解决方案,在我的应用程序中插入音频播放器
