我正在使用audioplayers包向我的应用程序添加声音，但在第一次构建时没有播放声音。在加载文件时热重启面团后，我得到了这个异常：
E/flutter (32175): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: Unable to load asset: assets/assets/click.mp3
E/flutter (32175): #0 PlatformAssetBundle.load (package:flutter/src/services/asset_bundle.dart:221:7)
E/flutter (32175): <asynchronous suspension>
E/flutter (32175): #1 AudioCache._fetchAsset (package:audioplayers/audio_cache.dart:60:29)
E/flutter (32175): #2 AudioCache.fetchToMemory (package:audioplayers/audio_cache.dart:67:30)
E/flutter (32175): <asynchronous suspension>
E/flutter (32175): #3 AudioCache.load (package:audioplayers/audio_cache.dart:82:37)
E/flutter (32175): #4 AudioCache.getAbsoluteUrl (package:audioplayers/audio_cache.dart:140:23)
E/flutter (32175): #5 AudioCache.play (package:audioplayers/audio_cache.dart:103:24)
E/flutter (32175): #6 _MapScreenState.build.<anonymous closure> (package:fixit_cloud_biking/Screens/map_screen.dart:1239:46)
E/flutter (32175): #7 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:706:14)
E/flutter (32175): #8 _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:789:36)
E/flutter (32175): #9 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24)
E/flutter (32175): #10 TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:486:11)
E/flutter (32175): #11 BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:264:5)
E/flutter (32175): #12 BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:199:7)
E/flutter (32175): #13 PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:467:9)
E/flutter (32175): #14 PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:76:12)
E/flutter (32175): #15 PointerRouter._dispatchEventToRoutes.<anonymous closure> (package:flutter/src/gestures/pointer_router.dart:117:9)
E/flutter (32175): #16 _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:379:8)
E/flutter (32175): #17 PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:115:18)
E/flutter (32175): #18 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:101:7)
E/flutter (32175): #19 GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:218:19)
E/flutter (32175): #20 GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:198:22)
E/flutter (32175): #21 GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7)
E/flutter (32175): #22 GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7)
E/flutter (32175): #23 GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7)
E/flutter (32175): #24 _rootRunUnary (dart:async/zone.dart:1138:13)
E/flutter (32175): #25 _CustomZone.runUnary (dart:async/zone.dart:1031:19)
E/flutter (32175): #26 _CustomZone.runUnaryGuarded (dart:async/zone.dart:933:7)
E/flutter (32175): #27 _invoke1 (dart:ui/hooks.dart:273:10)
E/flutter (32175): #28 _dispatchPointerDataPacket (dart:ui/hooks.dart:182:5)
E/flutter (32175):
我确实将这些文件放在了同一个assets文件夹中，该文件夹包含了我用于图标的所有图像，因此pubspec.yaml文件中的缩进是正确的。问题不应该是文件命名，因为我使用了驼色大小写或单个单词命名(从使用空格的图像命名中学到的教训…(。值得一提的是，如果我将文件拖放到assets文件夹中，就会出现错误。我试着删除文件夹，重新创建它，然后拖放作品，但只有一次。。瞬间添加的文件抛出错误。这是应该播放声音的按钮：
IconButton(
icon: Image.asset('assets/centerMapButton.png'),
iconSize: 60,
onPressed: () async {
await widget.cache.play('assets/click.mp3',
volume: 50, mode: PlayerMode.MEDIA_PLAYER);
print('Center map button pressed');
_mapController.move(userLocation, 16);
}),
并且CCD_ 4被声明为CCD_。
如果您不在pubspec.yaml.中设置资产位置，这可能会在just_audio中发生
flutter:
assets:
- audio/
这一消息会告诉Flutter，您在项目根目录中有一个音频文件夹，用于保存音频资产。
完成后，你应该能够设置资产并像这样玩：
await player.setAsset('audio/cow.mp3');
player.play();
如果您在路径中拼写错误，也可能发生错误，但我认为您已经检查过了。
尝试更改此资产/单击.mp3至单击.mp3
我也犯了同样的错误，忽略了路径中的"assets/"，使其无缝播放本地声音。音频播放器假定其默认路径为资产/
清除资产文件夹对我有效：
await AudioPlayer.clearAssetCache();
清除插件的内部资产缓存目录。当应用程序的资产已更改，以强制从中重新提取资产资产捆绑包。
错误在assets中，无需编写。