Android MediaPlayer not preparing. Error (1, -4)

问题

So I've been trying to make a simple sound effect app for android. Here is the relevant code:

public static final String LOG_TAG = "BCA";

public MediaPlayer mp;

@Override
public void onCreate(Bundle savedInstanceState) 
{
        Log.v(LOG_TAG, "creating");
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main_list);

    mp = new MediaPlayer();
    mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
        Log.v(LOG_TAG, "set stream type");
    playSound();
}

public void playSound()
{
    try {
        mp.setDataSource("R.raw.sound1");
            Log.v(LOG_TAG, "set data source");
        mp.setOnPreparedListener(this);
        mp.setOnErrorListener(this);
        mp.prepareAsync();
            Log.v(LOG_TAG, "preparing");
    } 
    catch (IllegalArgumentException e) {
        e.printStackTrace();
    } 
    catch (IllegalStateException e) {
        e.printStackTrace();
    } 
    catch (IOException e) {
        e.printStackTrace();
    }
}

public void onPrepared(MediaPlayer mediaPlayer)
{ 
                Log.v(LOG_TAG, "finished preparing; starting");
    mp.start();
        Log.v(LOG_TAG, "started music");
}

public boolean onError(MediaPlayer mp, int e, int f)
{
        Log.v(LOG_TAG, "There was an error");
        Log.v(LOG_TAG, mp + " " + e + " " + f);
    mp.reset();
    return true;
}

Basically it gets to the set "set data source" tag but never finishes preparing. the error code is (1, 4) the 1 apparently being an unknown error. I have used multiple sound files, one of which I know works as the player works when just using the mp.create( etc... )

I'm not sure what's going on here

Thanks in advance

EDIT: So I followed the example of the link that Alexis Cartier gave and now there are no errors. However, the FileinputStream never finishes. The program just seems to stall. Here is the new code:

public void playMusic()
{
    File file = new File("R.raw.music1");
        Log.v(LOG_TAG, "set file");
    try {
            Log.v(LOG_TAG, "in try block");
        FileInputStream is = new FileInputStream(file);
            Log.v(LOG_TAG, "set file input stream");
        mp.setDataSource(is.getFD());
            Log.v(LOG_TAG, "set data source");
        mp.setOnPreparedListener(this);
        mp.setOnErrorListener(this);
            Log.v(LOG_TAG, "set on prepared/error listeners");
        mp.prepareAsync();
            Log.v(LOG_TAG, "preparing");
    }

回答1:

See the answer of this question to modify your code : MediaPlayer.setDataSource causes IOException for valid file

But you can't do mp.setDataSource("R.raw.sound1");

来源：https://stackoverflow.com/questions/11970574/android-mediaplayer-not-preparing-error-1-4

标签

java

android

media-player

prepare