Android的播放外接MP3：错误 - 媒体播放器启动名为状态1 [英] Android playing external MP3: error -- MediaPlayer start called in state 1

问题描述

我有麻烦玩Android的外部MP3文件。我用下面的code：

I'm having trouble playing an external MP3 file on Android. I'm using the following code:

MediaPlayer player = new MediaPlayer();
try {
    BufferedInputStream bis = new BufferedInputStream(new java.net.URL(url).openStream());
    FileOutputStream fos = new FileOutputStream(Environment.getExternalStorageDirectory().getPath() + "/forvo_temp.mp3");
    BufferedOutputStream bos = new BufferedOutputStream(fos,1024);
    byte [] data = new byte[1024];

    int x=0;
    while((x=bis.read(data,0,1024))>=0){
        bos.write(data,0,x);               
    }
    player.reset();
    player.start();

} catch (Exception e) {
    e.printStackTrace();
}

网​​址是外部文件是字符串。我有写权限的SD卡（ WRITE_EXTERNAL_STORAG​​E ）。

url is the string where the external file is. I do have write permission for the SD card (WRITE_EXTERNAL_STORAGE).

在调试，我看到：

E MediaPlayer start called in state 1
E MediaPlayer error (-38, 0)
E MediaPlayer Error (-38,0)

可能是什么问题呢？

What might the problem be?

推荐答案

找到了答案：在调用 player.start（），你必须运行的setDataSource（）和 prepare（），根据的的/reference/android/media/MediaPlayer.html#StateDiagram">State图。

Found the answer: before calling player.start(), you have to run setDataSource() and prepare(), according to the State Diagram of the MediaPlayer reference.

这样的：

// Use same path as before
player.setDataSource(Environment.getExternalStorageDirectory().getPath() + "/forvo_temp.mp3");
player.prepare();

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