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我想在我的Android应用程序中播放实时HTTP流，因此我在另一台PC上安装了Windows Media Encoder 9，并将其用于创建实时HTTP音频流。如何在Android上的MediaPlayer中播放实时HTTP音频流？
实时HTTP流是好的：我测试了它，它可以通过Windows Media Player或VLC在PC上播放，并且可以在我的手机上通过VLC for Android播放。
所以，在我的Android应用程序，我写了这个代码：
private MediaPlayer player = null;
@Override
public void onCreate(Bundle savedInstanceState) {
StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
.detectDiskReads()
.detectDiskWrites()
.detectNetwork() // or .detectAll() for all detectable problems
.penaltyLog()
.build());
StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
.detectLeakedSqlLiteObjects()
//.detectLeakedClosableObjects()
.penaltyLog()
.penaltyDeath()
.build());
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnPlay = (Button)findViewById(R.id.play);
address = (TextView)findViewById(R.id.address);
btnPlay.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
play();
}
});
}
private void play()
{
String serverIp;
serverIp = address.getText().toString(); // get the uri address, for example http://xxx.xxx.xxx.xxx:2340
if (player == null)
{
player = new MediaPlayer();
}
else
{
player.stop();
player.reset();
}
try {
Log.v("", "Init a new MediaPlayer");
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
Log.v("", "Set the stream type to STREAM_MUSIC");
player.setDataSource(this, Uri.parse(serverIp));
Log.v("", "Set the source is " + serverIp);
player.setOnBufferingUpdateListener(this);
player.setOnPreparedListener(this);
player.setOnErrorListener(this);
player.prepareAsync();
Log.v("", "After prepareAsync");
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
Log.v("IllegalArgumentException", e.toString());
} catch (SecurityException e) {
// TODO Auto-generated catch block
Log.v("SecurityException", e.toString());
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
Log.v("IllegalStateException", e.toString());
} catch (IOException e) {
// TODO Auto-generated catch block
Log.v("IOException", e.toString());
} catch (Exception e) {
Log.v("Exception",e.toString());
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
public void onPrepared(MediaPlayer mp) {
// TODO Auto-generated method stub
try {
Log.v("onPrepared", "After prepareAsync");
mp.start();
}
catch (Exception e) {
Log.v("play", e.toString());
}
}
@Override
public void onBufferingUpdate(MediaPlayer mp, int percent) {
// TODO Auto-generated method stub
Log.v("onBufferingUpdate", "Buffering Update");
}
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
// TODO Auto-generated method stub
Log.v("MediaPlayer onError", "what=" + what + " extra=" + extra);
return true;
}
但没有奏效。当我点击播放按钮时，没有任何反应。但是，如果我输入在互联网上找到的其他一些URL（例如，http://www.example.com/song.mp3），它就可以工作。
所以任何人都可以帮助我吗？日志信息如下。我的手机是HTC s710e，而我的Android版本是4.0.4。
11-20 22:28:14.137: V/(580): Init a new MediaPlayer
11-20 22:28:14.137: V/(580): Set the stream type tp STREAM_MUSIC
11-20 22:28:14.147: D/MediaPlayer(580): Couldn't open file on client side, trying server side
11-20 22:28:14.178: E/Trace(39): error opening trace file: No such file or directory (2)
11-20 22:28:14.178: V/(580): After prepareAsync
11-20 22:28:14.297: V/ChromiumHTTPDataSource(39): connect on behalf of uid 10044
11-20 22:28:14.339: I/qtaguid(39): Tagging socket 27 with tag 3f500000000(1013) for uid 10044 failed errno=-2
11-20 22:28:14.629: I/ChromiumHTTPDataSourceSupport(39): Server responded with http status 400
11-20 22:28:14.648: I/qtaguid(39): Untagging socket 27 failed errno=-2
11-20 22:28:14.657: I/AwesomePlayer(39): mConnectingDataSource->connect() returned -1004
11-20 22:28:14.657: E/MediaPlayer(580): error (1, -1004)
11-20 22:28:14.667: E/MediaPlayer(580): Error (1,-1004)
11-20 22:28:14.667: V/MediaPlayer onError(580): what=1 extra=-1004
也许这是因为Windows Media编码器采用了“ Windows媒体编解码器“，Android不支持它。我现在遇到了类似的问题，我需要播放视频流，而这些流来自Windows Media Encoder。错误-1004可能意味着不支持的编解码器 - 我不知道我在哪里可以找到它的含义... – mrmoment
好的，只需找到MEDIA_ERROR_IO = -1004，表示“文件或网络相关的操作错误。” – mrmoment