Android MediaPlayer无法流式传输SoundCloud曲目

Question

我正试图使用MediaPlayer在我的Android设备上播放SoundCloud曲目，但我很难让它正常工作。我正在使用SoundCloud java API包装器从SoundCloud获取数据，这很好用。MediaPlayer实例设置如下：

mMediaPlayer = new MediaPlayer();
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

点击按钮时调用流：

public void onClick(View v) {
    try {
//        mMediaPlayer.setDataSource(mStreamURL);
        mMediaPlayer.setDataSource(mPlayButton.getContext(), Uri.parse(mStreamURL));
        mMediaPlayer.prepare();
        mMediaPlayer.start();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

变量mStreamURL包含从SoundCloud获得的流URL，例如https://api.soundcloud.com/tracks/143042205/stream。我不太确定在这种情况下应该使用哪个URL，因为我从SoundCloud获得了其中的几个URL（我已经从下面删除了明显不必要的信息）：

{"id":143042205,
"title":"Piano Sonata No.26 In E Flat, Op.81a - Les Adieux  - 3. Das Wiedersehn (Vivacissimamente)",
"sharing":"public",
"download_url":"https://api.soundcloud.com/tracks/143042205/download",
"streamable":true,
"permalink_url":"http://soundcloud.com/ystein-myrmo/piano-sonata-no-26-in-e-flat-2",
"original_format":"mp3",
"original_content_size":12515204,
"attachments_uri":"https://api.soundcloud.com/tracks/143042205/attachments",
"stream_url":"https://api.soundcloud.com/tracks/143042205/stream",
"uri":"https://api.soundcloud.com/tracks/143042205",
"permalink":"piano-sonata-no-26-in-e-flat-2",
"secret_uri":"https://api.soundcloud.com/tracks/143042205?secret_token=s-GvCYp",
"waveform_url":"https://w1.sndcdn.com/IASpgyYFSiPM_m.png"}

我尝试过同时使用stream_url和permalink_url，但都失败了。我注意到使用mMediaPlayer.setDataSource(mStreamURL);和mMediaPlayer.setDataSource(mPlayButton.getContext(), Uri.parse(mStreamURL));来设置MediaPlayer的数据源是有区别的。当使用前者时，我不会从MediaPlayer实例中得到错误，但当我使用后者时，我会得到以下错误：

D/SoundCloudProfileWidget(388): Trying to play track http://soundcloud.com/ystein-myrmo/piano-sonata-no-26-in-e-flat-2
I/MediaPlayer(388): path is null
D/MediaPlayer(388): setDataSource IOException happend : 
D/MediaPlayer(388): java.io.FileNotFoundException: No content provider: http://soundcloud.com/ystein-myrmo/piano-sonata-no-26-in-e-flat-2
D/MediaPlayer(388):     at android.content.ContentResolver.openTypedAssetFileDescriptor(ContentResolver.java:761)
D/MediaPlayer(388):     at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:665)
D/MediaPlayer(388):     at android.media.MediaPlayer.setDataSource(MediaPlayer.java:960)
D/MediaPlayer(388):     at android.media.MediaPlayer.setDataSource(MediaPlayer.java:914)
D/MediaPlayer(388):     at com.test.app.soundcloud.SoundCloudProfileWidget$PlayButtonListener.onClick(SoundCloudProfileWidget.java:149)
D/MediaPlayer(388):     at android.view.View.performClick(View.java:4475)
D/MediaPlayer(388):     at android.view.View$PerformClick.run(View.java:18786)
D/MediaPlayer(388):     at android.os.Handler.handleCallback(Handler.java:730)
D/MediaPlayer(388):     at android.os.Handler.dispatchMessage(Handler.java:92)
D/MediaPlayer(388):     at android.os.Looper.loop(Looper.java:176)
D/MediaPlayer(388):     at android.app.ActivityThread.main(ActivityThread.java:5419)
D/MediaPlayer(388):     at java.lang.reflect.Method.invokeNative(Native Method)
D/MediaPlayer(388):     at java.lang.reflect.Method.invoke(Method.java:525)
D/MediaPlayer(388):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
D/MediaPlayer(388):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
D/MediaPlayer(388):     at dalvik.system.NativeStart.main(Native Method)
D/MediaPlayer(388): Couldn't open file on client side, trying server side

对于两种设置数据源的方法，当到达MediaPlayer的prepare()方法时，我得到了以下内容：

V/MediaPlayer(4964): prepare
V/MediaPlayer(4964): message received msg=100, ext1=1, ext2=-1004
E/MediaPlayer(4964): error (1, -1004)
V/MediaPlayer(4964): signal application thread
V/MediaPlayer(4964): prepare complete - status=1
W/System.err(4964): java.io.IOException: Prepare failed.: status=0x1
W/System.err(4964):     at android.media.MediaPlayer.prepare(Native Method)
W/System.err(4964):     at com.test.app.soundcloud.SoundCloudProfileWidget$PlayButtonListener.onClick(SoundCloudProfileWidget.java:143)
W/System.err(4964):     at android.view.View.performClick(View.java:4475)
W/System.err(4964):     at android.view.View$PerformClick.run(View.java:18786)
W/System.err(4964):     at android.os.Handler.handleCallback(Handler.java:730)
W/System.err(4964):     at android.os.Handler.dispatchMessage(Handler.java:92)
W/System.err(4964):     at android.os.Looper.loop(Looper.java:176)
W/System.err(4964):     at android.app.ActivityThread.main(ActivityThread.java:5419)
W/System.err(4964):     at java.lang.reflect.Method.invokeNative(Native Method)
W/System.err(4964):     at java.lang.reflect.Method.invoke(Method.java:525)
W/System.err(4964):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
W/System.err(4964):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
W/System.err(4964):     at dalvik.system.NativeStart.main(Native Method)

我在任何地方都找不到关于error (1, -1004)的任何信息，我在这里有点不知所措。谷歌搜索似乎也没有多大帮助。此外，我还尝试了以下方法：

1. 更改为使用mMediaPlayer.prepareAsync()
2. 将权限更改为：<uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
3. 在流URL中将https更改为http，反之亦然
4. 各种各样的其他东西

非常感谢您的任何评论或提示！

Answer 1

您需要在流Url之后添加?client_id=YOUR_API_KEY。

在您的示例中：stream_url=https://api.soundcloud.com/tracks/143042205/stream?client_id=YOUR_API_KEY