所以，当我单击按钮时，我试图从 Flutter 资产中获得这种声音。到目前为止，我已经尝试了许多不同的软件包，但似乎没有一个对我有用。我不断得到这个：
D/ViewRootImpl( 8796): enqueueInputEventMotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=582.0, y[0]=1570.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=48512196, downTime=48512196, deviceId=-1, source=0x1002, displayId=0 }
D/ViewRootImpl[MainActivity]( 8796): processMotionEvent MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=582.0, y[0]=1570.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=48512196, downTime=48512196, deviceId=-1, source=0x1002, displayId=0 }
D/ViewRootImpl[MainActivity]( 8796): dispatchPointerEvent handled=true, event=MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=582.0, y[0]=1570.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=48512196, downTime=48512196, deviceId=-1, source=0x1002, displayId=0 }
W/Choreographer( 8796): Frame time is 0.144734 ms in the future! Check that graphics HAL is generating vsync timestamps using the correct timebase.
D/ViewRootImpl[MainActivity]( 8796): processMotionEvent MotionEvent { action=ACTION_UP, actionButton=0, id[0]=0, x[0]=582.0, y[0]=1570.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=48512312, downTime=48512196, deviceId=-1, source=0x1002, displayId=0 }
D/ViewRootImpl[MainActivity]( 8796): dispatchPointerEvent handled=true, event=MotionEvent { action=ACTION_UP, actionButton=0, id[0]=0, x[0]=582.0, y[0]=1570.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=48512312, downTime=48512196, deviceId=-1, source=0x1002, displayId=0 }
I/ExoPlayerImpl( 8796): Init e31da6b [ExoPlayerLib/2.13.1] [RMX2025CN, RMX2025, realme, 30]
D/AudioManager( 8796): getStreamVolume packageName=com.example.dicee_v2_red, index=14, streamType=3
E/ExoPlayerImplInternal( 8796): Playback error
E/ExoPlayerImplInternal( 8796): com.google.android.exoplayer2.ExoPlaybackException: Source error
E/ExoPlayerImplInternal( 8796): at com.google.android.exoplayer2.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:579)
E/ExoPlayerImplInternal( 8796): at android.os.Handler.dispatchMessage(Handler.java:102)
E/ExoPlayerImplInternal( 8796): at android.os.Looper.loop(Looper.java:260)
E/ExoPlayerImplInternal( 8796): at android.os.HandlerThread.run(HandlerThread.java:67)
E/ExoPlayerImplInternal( 8796): Caused by: com.google.android.exoplayer2.source.UnrecognizedInputFormatException: None of the available extractors (Mp3Extractor, FlvExtractor, FlacExtractor, WavExtractor, FragmentedMp4Extractor, Mp4Extractor, AmrExtractor, PsExtractor, OggExtractor, TsExtractor, MatroskaExtractor, AdtsExtractor, Ac3Extractor, Ac4Extractor, JpegExtractor) could read the stream.
E/ExoPlayerImplInternal( 8796): at com.google.android.exoplayer2.source.BundledExtractorsAdapter.init(BundledExtractorsAdapter.java:92)
E/ExoPlayerImplInternal( 8796): at com.google.android.exoplayer2.source.ProgressiveMediaPeriod$ExtractingLoadable.load(ProgressiveMediaPeriod.java:1026)
E/ExoPlayerImplInternal( 8796): at com.google.android.exoplayer2.upstream.Loader$LoadTask.run(Loader.java:415)
E/ExoPlayerImplInternal( 8796): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
E/ExoPlayerImplInternal( 8796): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
E/ExoPlayerImplInternal( 8796): at java.lang.Thread.run(Thread.java:923)
E/AudioPlayer( 8796): TYPE_SOURCE: None of the available extractors (Mp3Extractor, FlvExtractor, FlacExtractor, WavExtractor, FragmentedMp4Extractor, Mp4Extractor, AmrExtractor, PsExtractor, OggExtractor, TsExtractor, MatroskaExtractor, AdtsExtractor, Ac3Extractor, Ac4Extractor, JpegExtractor) could read the stream.
E/flutter ( 8796): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: (0) Source error
E/flutter ( 8796): #0 AudioPlayer._load (package:just_audio/just_audio.dart:716:9)
E/flutter ( 8796): <asynchronous suspension>
E/flutter ( 8796): #1 AudioPlayer._setPlatformActive.setPlatform (package:just_audio/just_audio.dart:1096:28)
E/flutter ( 8796): <asynchronous suspension>
E/flutter ( 8796):
I/ExoPlayerImpl( 8796): Release e31da6b [ExoPlayerLib/2.13.1] [RMX2025CN, RMX2025, realme, 30] [goog.exo.core]
但是当我在 Web 中加载我的应用程序时，它工作得非常好。为什么？
我的代码：
import 'package:flutter/material.dart';
import 'dart:math';
import 'package:flutter/services.dart';
import 'package:just_audio/just_audio.dart';
void main() {
WidgetsFlutterBinding.ensureInitialized();
SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp])
.then((_) {
runApp(
MaterialApp(
home: Scaffold(
backgroundColor: Colors.red,
appBar: AppBar(
title: Text('Dicee'),
backgroundColor: Colors.blue.shade300,
),
body: NewDice(),
),
),
);
});
}
class NewDice extends StatefulWidget {
@override
_NewDiceState createState() => _NewDiceState();
}
class _NewDiceState extends State<NewDice> {
late AudioPlayer player;
@override
void initState() {
super.initState();
player = AudioPlayer();
}
@override
void dispose() {
player.dispose();
super.dispose();
}
int leftDiceNumber = 1;
int rightDiceNumber = 1;
@override
Widget build(BuildContext context) {
return Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Row(
children: [
Expanded(
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Image.asset('assets/dice$leftDiceNumber.png'),
),
),
Expanded(
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Image.asset('assets/dice$rightDiceNumber.png'),
),
),
],
),
ElevatedButton(
onPressed: () async {
await player.setAsset('audio/roll.mp3');
player.play();
setState(() {
rightDiceNumber = Random().nextInt(6) + 1;
leftDiceNumber = Random().nextInt(6) + 1;
});
},
style: ElevatedButton.styleFrom(
primary: Colors.blue.shade300,
),
child: Text('Roll the dice!',
style: TextStyle(
fontSize: 18,
)),
),
],
);
}
}
请帮助 :) 我也尝试过 flutter_audio_player 0.1.2 和许多其他软件包......似乎没有一个工作......
尝试了audiofileplayer 2.0.1，现在另一个错误...
I/AudiofileplayerPlugin(11305): onMethodCall: method = load
I/AudiofileplayerPlugin(11305): onMethodCall: method = play
E/MethodChannel#audiofileplayer(11305): Failed to handle method call
E/MethodChannel#audiofileplayer(11305): java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.flutter.plugins.audiofileplayer.ManagedMediaPlayer.play(boolean, int)' on a null object reference
E/MethodChannel#audiofileplayer(11305): at com.google.flutter.plugins.audiofileplayer.AudiofileplayerPlugin.onMethodCall(AudiofileplayerPlugin.java:256)
E/MethodChannel#audiofileplayer(11305): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:233)
E/MethodChannel#audiofileplayer(11305): at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:85)
E/MethodChannel#audiofileplayer(11305): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:818)
E/MethodChannel#audiofileplayer(11305): at android.os.MessageQueue.nativePollOnce(Native Method)
E/MethodChannel#audiofileplayer(11305): at android.os.MessageQueue.next(MessageQueue.java:335)
E/MethodChannel#audiofileplayer(11305): at android.os.Looper.loop(Looper.java:183)
E/MethodChannel#audiofileplayer(11305): at android.app.ActivityThread.main(ActivityThread.java:7656)
E/MethodChannel#audiofileplayer(11305): at java.lang.reflect.Method.invoke(Native Method)
E/MethodChannel#audiofileplayer(11305): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
E/MethodChannel#audiofileplayer(11305): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
E/DartMessenger(11305): Uncaught exception in binary message listener
E/DartMessenger(11305): java.lang.IllegalStateException: Reply already submitted
E/DartMessenger(11305): at io.flutter.embedding.engine.dart.DartMessenger$Reply.reply(DartMessenger.java:155)
E/DartMessenger(11305): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:253)
E/DartMessenger(11305): at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:85)
E/DartMessenger(11305): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:818)
E/DartMessenger(11305): at android.os.MessageQueue.nativePollOnce(Native Method)
E/DartMessenger(11305): at android.os.MessageQueue.next(MessageQueue.java:335)
E/DartMessenger(11305): at android.os.Looper.loop(Looper.java:183)
E/DartMessenger(11305): at android.app.ActivityThread.main(ActivityThread.java:7656)
E/DartMessenger(11305): at java.lang.reflect.Method.invoke(Native Method)
E/DartMessenger(11305): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
E/DartMessenger(11305): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
E/flutter (11305): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: PlatformException(AudioPluginError, Could not create ManagedMediaPlayer:flutter_assets/assets/audio/roll2.wav, null, null)
E/flutter (11305): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:597:7)
E/flutter (11305): #1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:158:18)
E/flutter (11305): <asynchronous suspension>
E/flutter (11305): #2 Audio._sendMethodCall (package:audiofileplayer/audiofileplayer.dart:751:7)
E/flutter (11305): <asynchronous suspension>
E/flutter (11305): #3 Audio._load (package:audiofileplayer/audiofileplayer.dart:433:7)
E/flutter (11305): <asynchronous suspension>
E/flutter (11305):
E/flutter (11305): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: PlatformException(AudioPluginError, Called play on an unloaded player: 8dbbdf54-e262-4c2a-af1c-e6cbff1ac399, null, null)
E/flutter (11305): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:597:7)
E/flutter (11305): #1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:158:18)
E/flutter (11305): <asynchronous suspension>
E/flutter (11305): #2 Audio._sendMethodCall (package:audiofileplayer/audiofileplayer.dart:751:7)
E/flutter (11305): <asynchronous suspension>
E/flutter (11305): #3 Audio._playNative (package:audiofileplayer/audiofileplayer.dart:661:7)
E/flutter (11305): <asynchronous suspension>
E/flutter (11305): #4 Audio._playHelper (package:audiofileplayer/audiofileplayer.dart:556:5)
E/flutter (11305): <asynchronous suspension>
E/flutter (11305): #5 Audio.play (package:audiofileplayer/audiofileplayer.dart:517:5)
E/flutter (11305): <asynchronous suspension>
E/flutter (11305):