Coma White Coma White - 7 months ago 50
Java Question

mediaPlayer error -38,0

I try to do simple online radio player. Here is adress of stream http://radio-electron.ru:8000/96 Here is my code.

MyActivity.java

package com.example.untitled2;

import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import java.io.IOException;

public class MyActivity extends Activity {

MediaPlayer mediaPlayer;
Button playButton;


@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}

@Override
public void onStart() {
super.onStart();
}

@Override
public void onResume() {
super.onResume();
mediaPlayer = new MediaPlayer();
playButton = (Button)findViewById(R.id.button);

playButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(mediaPlayer.isPlaying())
mediaPlayer.stop();
else {
try {

mediaPlayer.setDataSource(getApplicationContext(), Uri.parse("http://radio-electron.ru:8000/96"));
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() {
@Override
public boolean onError(MediaPlayer mediaPlayer, int i, int i2) {
Toast.makeText(getApplicationContext(), "ERROR " + i, Toast.LENGTH_LONG).show();
playButton.setEnabled(false);
Log.d("radio", "error " + i + " " + i2);
return false; //To change body of implemented methods use File | Settings | File Templates.
}
});
mediaPlayer.prepareAsync();
}
catch (IOException e) {
Toast.makeText(getApplicationContext(), "ERROR " + e, Toast.LENGTH_LONG).show();
Log.d("radio", "error " + e);
}
mediaPlayer.start();
}
}
});
}
}


main.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="@+id/button"
android:layout_gravity="center"/>
</FrameLayout>


I have no idea, why i get -(38, 0) code and what does it mean.
I using Intellij IDEA and trying this code on Android 2.3 and 4.2 emulators and get some problem.

Answer

-38 refers to ENOSYS error code from errno.h (see this explanation http://stackoverflow.com/a/15206308/768935)

You seem to try to start the playing before the preparation is complete. Use the setOnPreparedListener() method to set a preparation listener and call the start() method only after the preparation is complete.

mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
  public void onPrepared(MediaPlayer mp) {
      mp.start();
  }
});
mediaPlayer.prepareAsync();

And remove the current mediaPlayer.start() invocation from the code.

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