Question

我无法使用orroids MediaPlayer传输wav音频文件。

波形文件的URL已成功验证并在设备上单独下载。这些下载的文件没有问题，但是当相同的文件流式传输到播放器时，它根本不会播放并出错。

01-18 09:25:00.963: E/MediaPlayer(8825): error (1, -4)
01-18 09:25:00.963: W/System.err(8825): java.io.IOException: Prepare failed.: status=0x1
01-18 09:25:00.963: W/System.err(8825):     at android.media.MediaPlayer.prepare(Native Method)
01-18 09:25:00.963: W/System.err(8825):     at com.movivation.wavetrial.AudioPlayer.playMedia(AudioPlayer.java:174)
01-18 09:25:00.963: W/System.err(8825):     at com.movivation.wavetrial.AudioPlayer.onCreate(AudioPlayer.java:92)
01-18 09:25:00.963: W/System.err(8825):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-18 09:25:00.963: W/System.err(8825):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2633)
01-18 09:25:00.963: W/System.err(8825):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2685)
01-18 09:25:00.963: W/System.err(8825):     at android.app.ActivityThread.access$2300(ActivityThread.java:126)
01-18 09:25:00.963: W/System.err(8825):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2038)
01-18 09:25:00.963: W/System.err(8825):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-18 09:25:00.963: W/System.err(8825):     at android.os.Looper.loop(Looper.java:123)
01-18 09:25:00.963: W/System.err(8825):     at android.app.ActivityThread.main(ActivityThread.java:4633)
01-18 09:25:00.963: W/System.err(8825):     at java.lang.reflect.Method.invokeNative(Native Method)
01-18 09:25:00.973: W/System.err(8825):     at java.lang.reflect.Method.invoke(Method.java:521)
01-18 09:25:00.973: W/System.err(8825):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
01-18 09:25:00.973: W/System.err(8825):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
01-18 09:25:00.973: W/System.err(8825):     at dalvik.system.NativeStart.main(Native Method)
01-18 09:25:00.973: I/MediaPlayer(8825): Info (1,26)

播放文件的代码：

private void playMedia(boolean isWebUrl) {
    mPlayer = new MediaPlayer();
    mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

    mPlayer.setOnCompletionListener(new OnCompletionListener() {

        @Override
        public void onCompletion(MediaPlayer mp) {
            Log.d(tag, "Ending thread");
            isPlaying = false;
            if (pd != null) {
                pd.dismiss();
            }
        }
    });

    mPlayer.setOnPreparedListener(new OnPreparedListener() {

        @Override
        public void onPrepared(MediaPlayer mp) {
            Log.d(tag, "starting");

            mPlayer.start();
            mSeekbar.setProgress(0);
            mSeekbar.setMax(mPlayer.getDuration());

            Log.d(tag, "seek started");
            new PlayAsync().execute();
        }
    });

    mSeekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
        }
        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {
        }
        @Override
        public void onProgressChanged(SeekBar seekBar, int progress,
                boolean fromUser) {
            if (fromUser) {
                mPlayer.seekTo(progress);
                mSeekbar.setProgress(progress);
            }
        }
    });

    try {
        if (isWebUrl) {
            Log.d(tag, "playing tmp file");
            mPlayer.setDataSource(url);
        } else {
            File f = new File(fileurl);
            FileInputStream fis = new FileInputStream(f);
            mPlayer.setDataSource(fis.getFD());
        }

        Log.d(tag, "calling prepare");
        mPlayer.prepare(); //originally i use prepareAsync()
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch (IllegalStateException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

我尝试播放的文件实际上是一个wave文件，我没有找到任何关于上述错误的具体说法。

任何有关波形流或错误本身的指针都将受到高度赞赏。感谢。

Answer 1

嗯，这家伙似乎做你想做的事。我们来看看：http://code.google.com/p/rxwen-blog-stuff/source/browse/trunk/android/streaming_audio/

流式.wav音频失败，但单独下载时播放

1 个答案: