我试图使一个冥想页，当你点击开始，它会启动计时器和声音将播放.我不能播放声音，它显示出许多错误.我试过很多方法.请帮助我播放声音，或者如果你有任何其他方法，请提供. ................................................................................................................... 对不起，这个点.stackoverflow不允许发布.
import 'dart:async';
import 'package:ableeasefinale/pages/UI/navigationBar.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:audioplayers/audioplayers.dart';
class MedPage extends StatefulWidget {
const MedPage({super.key});
@override
State<MedPage> createState() => _MedPageState();
}
class _MedPageState extends State<MedPage> {
static const maxSeconds = 60;
int seconds = maxSeconds;
bool medStart = false;
String meditationTime = "1 Minutes";
Timer? timer;
final player = AudioPlayer();
void startTimer() {
player.play(AssetSource('medAudio.mp3'));;
timer = Timer.periodic(Duration(seconds: 1), (_) {
if (seconds > 0) {
setState(() {
seconds--;
});
} else {
stopTimer(reset: false);
}
});
}
void resetTimer() => setState(() {
seconds = maxSeconds;
medStart = false;
player.stop();
});
void stopTimer({bool reset = true}) {
setState(() {
player.stop();
medStart == false;
resetTimer();
timer?.cancel();
});
}
@override
Widget build(BuildContext context) {
return !medStart
? Scaffold(
backgroundColor: Theme.of(context).colorScheme.background,
body: Column(
children: [
Center(
child: Padding(
padding: const EdgeInsets.only(top: 150),
child: Text(
"Meditation",
style: TextStyle(
color: Theme.of(context).colorScheme.onPrimary,
fontSize: 35),
),
),
),
Padding(
padding: const EdgeInsets.only(top: 80),
child: Container(
height: 250,
width: 250,
decoration: BoxDecoration(
color: Theme.of(context).colorScheme.primary,
shape: BoxShape.circle,
boxShadow: [
new BoxShadow(
offset: Offset(2, 2),
color: Colors.black,
blurRadius: 5.0,
),
],
),
child: Padding(
padding: const EdgeInsets.all(10.0),
child: Image(
image: AssetImage('lib/assets/images/meditating.png'),
)),
),
),
Container(
padding: EdgeInsets.only(top: 20),
child: DropdownButton<String>(
itemHeight: 50.0,
value: meditationTime,
icon: const Icon(Icons.keyboard_arrow_down_rounded),
style: TextStyle(
color: Theme.of(context).colorScheme.onSecondary,
fontSize: 22),
underline: Container(
height: 2,
color: Theme.of(context).colorScheme.primary,
),
onChanged: (String? newValue) {
setState(() {
meditationTime = newValue!;
});
},
items: [
DropdownMenuItem(
value: '1 Minutes',
child: Text('1 Minutes'),
),
],
),
),
Padding(
padding: const EdgeInsets.only(top: 20),
child: ElevatedButton(
style: ElevatedButton.styleFrom(
backgroundColor: Theme.of(context).colorScheme.primary),
onPressed: () {
setState(() {
medStart = true;
startTimer();
});
},
child: Column(
children: [
Text(
"Start",
style: TextStyle(color: Colors.white, fontSize: 20),
),
],
),
),
),
],
),
)
: Scaffold(
backgroundColor: Theme.of(context).colorScheme.background,
body: Column(
children: [
Center(
child: Padding(
padding: const EdgeInsets.only(top: 150),
child: Text(
"Meditation",
style: TextStyle(
color: Theme.of(context).colorScheme.onPrimary,
fontSize: 35),
),
),
),
Container(
child: Padding(
padding: const EdgeInsets.only(top: 80),
child: Column(children: [
SizedBox(
width: 250,
height: 250,
child: Stack(
fit: StackFit.expand,
children: [
CircularProgressIndicator(
color: Theme.of(context).colorScheme.secondary,
value: seconds / maxSeconds,
),
Container(
height: 250,
width: 250,
child: Padding(
padding: const EdgeInsets.all(15.0),
child: Image(
image: AssetImage(
"lib/assets/images/meditating.png")),
),
)
],
),
),
SizedBox(
height: 30,
),
Text('$seconds'),
]),
),
),
Padding(
padding: const EdgeInsets.only(top: 20),
child: ElevatedButton(
style: ElevatedButton.styleFrom(
backgroundColor: Theme.of(context).colorScheme.primary),
onPressed: () {
setState(() {
medStart = false;
stopTimer();
});
},
child: Column(
children: [
Text(
"STOP",
style: TextStyle(color: Colors.white, fontSize: 20),
),
],
),
),
),
],
),
);
}
}
错误:
E/flutter ( 7638): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Unable to load asset: "assets/medAudio.mp3".
E/flutter ( 7638): The asset does not exist or has empty data.
E/flutter ( 7638): #0 PlatformAssetBundle.load.<anonymous closure> (package:flutter/src/services/asset_bundle.dart:324:9)
E/flutter ( 7638): <asynchronous suspension>
E/flutter ( 7638): #1 AudioCache.fetchToMemory (package:audioplayers/src/audio_cache.dart:89:22)
E/flutter ( 7638): <asynchronous suspension>
E/flutter ( 7638): #2 AudioCache.load (package:audioplayers/src/audio_cache.dart:120:31)
E/flutter ( 7638): <asynchronous suspension>
E/flutter ( 7638): #3 AudioCache.loadPath (package:audioplayers/src/audio_cache.dart:129:26)
E/flutter ( 7638): <asynchronous suspension>
E/flutter ( 7638): #4 AudioPlayer.setSourceAsset (package:audioplayers/src/audioplayer.dart:360:23)
E/flutter ( 7638): <asynchronous suspension>
E/flutter ( 7638): #5 AudioPlayer.setSource (package:audioplayers/src/audioplayer.dart:300:5)
E/flutter ( 7638): <asynchronous suspension>
E/flutter ( 7638): #6 AudioPlayer.play (package:audioplayers/src/audioplayer.dart:195:5)
E/flutter ( 7638): <asynchronous suspension>
E/flutter ( 7638):
Pubspec.yaml - assets
