从JavaScript中播放WebView中的声音

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我正在尝试从资源中加载到WebView的JavaScript代码中播放声音：

WebView web_view = (WebView) findViewById(R.id.web_view);
web_view.getSettings().setJavaScriptEnabled(true);
web_view.setWebChromeClient(new WebChromeClient());
web_view.loadUrl("file:///assets/www/index.html");

我尝试了以下方法的所有组合,如何使用OGG,MP3和WAV文件播放音频,JavaSrcipt代码位于assets / www / js / play.js：

audio = new Audio("../audio/sound.mp3");
audio.load();
audio.play();

audio = new Audio("./audio/sound.mp3");
audio.load();
audio.play();

audio = new Audio("audio/sound.mp3");
audio.load();
audio.play();

audio = new Audio("file:///android_asset/www/audio/sound.mp3");
audio.load();
audio.play();

audio = new Audio();
audio.src = document.getElementById("audio_tag").src;
audio.load();
audio.play();

其中audio_tag是< audio id =“audio_tag”src =“audio / sound.mp3”preload =“auto”>< / audio>,也尝试了路径和格式的所有组合.

但是声音没有播放,只知道可能出现的错误是遵循一般错误：

E/MediaPlayer(1530): error (1, -2147483648)

从这条信息消息中猜测,音频文件的路径应该适用于第二个第五个案例：

I/StagefrightPlayer(33): setDataSource('file:///android_asset/www/audio/sound.mp3');

虽然这个问题可能被认为是重复的
Android WebView playing audio with javascript并且答案无论如何都没有帮助因为永远不会调用shouldOverrideUrlLoading,我试图在这里更精确地指定这个问题.

你有什么可能是错的线索或如何找出它是什么？

谢谢.

编辑：使用Android 2.3在Galaxy Gio中测试给出了不同的错误集：

02-06 17:15:13.829: V/PlayerDriver(95): AddToScheduler 02-06
17:15:13.829: V/PlayerDriver(95): PendForExec 02-06 17:15:13.829:
V/PlayerDriver(95): OsclActiveScheduler::Current 02-06
17:15:13.829: V/PlayerDriver(95): StartScheduler 02-06
17:15:13.829: V/PVPlayer(95): send PLAYER_SETUP 02-06 17:15:13.829:
V/PlayerDriver(95): Send player code: 2 02-06 17:15:13.829:
V/PlayerDriver(95): CommandCompleted 02-06 17:15:13.829:
V/PlayerDriver(95): Completed command PLAYER_SETUP status=PVMFSuccess
02-06 17:15:13.829: V/PVPlayer(95):
setDataSource(file:///android_asset/www/audio/sound.mp3) 02-06
17:15:13.839: V/PVPlayer(95): prepareAsync 02-06 17:15:13.839:
V/PVPlayer(95): data source =
file:///android_asset/www/audio/sound.mp3 02-06 17:15:13.849:
V/PlayerDriver(95): Send player code: 3 02-06 17:15:13.849:
V/PlayerDriver(95): handleSetDataSource 02-06 17:15:13.849:
V/PlayerDriver(95): handleSetDataSource- scanning for extension
02-06 17:15:13.849: V/PlayerDriver(95): HandleInformationalEvent:
PVMFInfoErrorHandlingStart 02-06 17:15:13.849: V/PlayerDriver(95):
HandleInformationalEvent: type=26 UNHANDLED 02-06 17:15:13.849:
W/MediaPlayer(4361): info/warning (1, 26) 02-06 17:15:13.849:
V/PlayerDriver(95): CommandCompleted 02-06 17:15:13.849:
V/PlayerDriver(95): Completed command PLAYER_SET_DATA_SOURCE
status=PVMFErrNotSupported 02-06 17:15:13.849: E/PlayerDriver(95):
Command PLAYER_SET_DATA_SOURCE completed with an error or info
PVMFErrNotSupported 02-06 17:15:13.849: E/MediaPlayer(4361): error
(1, -4) 02-06 17:15:13.849: V/PVPlayer(95): run_init s=-2147483648,
cancelled=0 02-06 17:15:13.849: V/PlayerDriver(95):
HandleInformationalEvent: PVMFInfoErrorHandlingComplete 02-06
17:15:13.849: W/PlayerDriver(95): PVMFInfoErrorHandlingComplete
02-06 17:15:13.939: I/MediaPlayer(4361): Info (1,26) 02-06
17:15:13.939: E/MediaPlayer(4361): Error (1,-4) 02-06 17:15:13.939:
V/PVPlayer(95): reset 02-06 17:15:13.939: V/PlayerDriver(95): Send
player code: 18 02-06 17:15:13.939: V/PlayerDriver(95):
handleCancelAllCommands 02-06 17:15:13.939: V/PlayerDriver(95):
CommandCompleted 02-06 17:15:13.939: V/PlayerDriver(95): Completed
command PLAYER_CANCEL_ALL_COMMANDS status=PVMFSuccess 02-06
17:15:13.939: V/PlayerDriver(95): Send player code: 11 02-06
17:15:13.939: V/PlayerDriver(95): handleReset 02-06 17:15:13.939:
V/PlayerDriver(95): CommandCompleted 02-06 17:15:13.939:
V/PlayerDriver(95): Completed command PLAYER_RESET status=PVMFSuccess
02-06 17:15:13.939: V/PlayerDriver(95): Send player code: 17 02-06
17:15:13.939: V/PlayerDriver(95): handleRemoveDataSource 02-06
17:15:13.939: V/PlayerDriver(95): CommandCompleted 02-06
17:15:13.939: V/PlayerDriver(95): Completed command
PLAYER_REMOVE_DATA_SOURCE status=PVMFSuccess 02-06 17:15:13.939:
V/PlayerDriver(95): remove datasource complete 02-06 17:15:13.939:
V/PVPlayer(95): unmap file

解决方法:

我有同样的问题,最后我使用phonegap和cordova,你可以轻松地播放和录制音频：
http://docs.phonegap.com/en/2.9.0/cordova_media_media.md.html

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