Develop Reference

Radio stream issue

Hi we have an app in the playstore that has a module that play a stream from an url, the app works fine and we make a yearly release, but now that we are making changes, the part of the radio does not work, in any device.
Basically my code is
mediaPlayer = new MediaPlayer();
try {
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDataSource("http://radio.promosat.com:8104/");
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp.start();
}
});
mediaPlayer.prepareAsync();
}catch (Exception ex){
ex.printStackTrace();
}
I keep getting this error
E/MediaPlayer: Error (1,-2147483648)
This worked perfectly, the url that we use it's in the example code, it uses a pls file, that's where we obtained the stream url.

The error was the encoding of the stream...aacp is not supported in Android.

Android MediaPlayer.start does not start

I have yet to find an answer to this.
I have a local file (R.raw.Bob); and I am trying to use MediaPlayer to play the file.
Sometimes it plays, sometimes it does not. I have another file which plays seemingly fine every time.
My activity flow is like this: In onCreate I do the following:
MediaPlayer mBackground = MediaPlayer.create(MainAct.this, R.raw.background);
mBackground.start(); // Works as expected.
Now in a different part of the activity I have the following:
MediaPlayer mBob= MediaPlayer.create(MainActivity.this, R.raw.Bob);
mBob.start();
And nothing occurs. I have used Log.i() and the execution goes through the relevant code but the file does not start.
Why does MediaPlayer sometimes work and sometimes does not, and is there a more reliable way of playing sound files?

Try this to start:
MediaPlayer mBob = MediaPlayer.create(MainActivity.this, R.raw.Bob);
mBob.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(final MediaPlayer mp) {
mp.start();
}
});
and this to stop:
mBob.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mp.stop();
}
});

Simple mediaPlayer example doesn't work! Why?

From the Developer Guide I took this simple example:
MediaPlayer mediaPlayer = MediaPlayer.create(context, R.raw.sound_file_1);
mediaPlayer.start(); // no need to call prepare(); create() does that for you
But there is no sound!
Any ideas?

Check your media volume in your mobile (or) below code for playing sound file :
This is Worked for me:
public void play()
{
Thread playThread = new Thread() {
public void run()
{
mediaPlayer = MediaPlayer.create(VastuActivity.this, R.raw.click);
mediaPlayer.start();
}
};
playThread.start();
}
call the method play();

You got everything right. The only reason it may not work is some problem with the sound, may be the file you are using is not supported(in that case you should see some exceptions thrown in all messages tab) or it's just your device

Mediaplayer error (-19,0) after repeated plays

I have a game in which a sound plays when a level is completed. Everything works fine to start with but after repeating a level 10 or 20 times the logcat suddenly reports:
"MediaPlayer error (-19,0)" and/or "MediaPlayer start called in state 0" and the sounds are no longer made.
I originally had the all sounds in mp3 format but, after reading that ogg may be more reliable, I converted them all to ogg, but the errors appeared just the same.
Any idea how I can fix this problem?

I was getting the same problem, I solved it by adding the following code to release the player:
mp1 = MediaPlayer.create(sound.this, R.raw.pan1);
mp1.start();
mp1.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
mp.release();
};
});

I think you are not releasing the mediaplayers you are using to play the sound..
You need to release() the media players otherwise the resources are not released , and you soon get out of memory (since you allocate them again next time). so,I think you can play twice or even thrice... but not many times without releasing the resources

MediaPlayer is not a good option when you are playing small sound effects as the user can click on multiple buttons very soon and you will have to create a MP object for all of them which doesnt happen synchronously. That is why you are not hearing sounds for every click. Go for the SoundPool Class which allows you to keep smaller sounds loaded in memory and you can play them any time you want without any lag which you would feel in a mediaplayer. http://developer.android.com/reference/android/media/SoundPool.html Here is a nice tutorial : http://www.anddev.org/using_soundpool_instead_of_mediaplayer-t3115.html

I solved both the errors (-19,0) and (-38,0) , by creating a new object of MediaPlayer every time before playing and releasing it after that.
Before :
void play(int resourceID) {
if (getActivity() != null) {
//Using the same object - Problem persists
player = MediaPlayer.create(getActivity(), resourceID);
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
player.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
player.release();
}
});
player.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp.start();
}
});
}
}
After:
void play(int resourceID) {
if (getActivity() != null) {
//Problem Solved
//Creating new MediaPlayer object every time and releasing it after completion
final MediaPlayer player = MediaPlayer.create(getActivity(), resourceID);
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
player.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
player.release();
}
});
player.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp.start();
}
});
}
}

This is a very old question, But this came up first in my search results So other people with the same issue will probably come upon this page eventually.
Unlike what some others have said, you can in fact use MediaPlayer for small sounds without using a lot of memory. I'll put in a little modified snippit from my soundboard app to show you what I'm getting at.
private MediaPlayer mp;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.your_layout);
mp = new MediaPlayer();
}
private void playSound(int soundID){
mp.reset();
AssetFileDescriptor sound = getResources().openRawResourceFd(soundID);
try {
mp.setDataSource(sound.getFileDescriptor(),sound.getStartOffset(),sound.getLength());
mp.prepare();
} catch (IOException e) {
e.printStackTrace();
}
mp.start();
}
with the way I set it up, you create on MediaPlayer object that you reuse everytime you play a sound so that you don't use up too much space.
You call .reset() instead of .release() because .release() is only used if you are disposing of an object, however you want to keep your MediaPlayer Object.
You use an assetfiledescriptor to set a new soundfile for your mediaplayer to play instead of setting a new object to your mediaplayer address because that way you are creating new objects within the method that aren't being handled properly and you will eventually run into the same error as you described.
This is only one of many ways to use MediaPlayer but I personally think it is the most efficient if you are only using it for small sound applications. The only issue with it is that it is relatively restrictive in what you can accomplish, but that shouldn't be much of an issue if you are indeed using it for small sound applications.

i try delete emulator and new create emulator for remove error of (-19,0) media player.

Android - How do I only allow one instance of MediaPlayer to play at a time?

I'm trying to create a simple Sound-board Android app, using ListView items as buttons. (Btw, I'm a novice programmer)
The idea is that I press a button, and a specific sound file plays. If I press any button while a sound is playing, it should first stop that sound and then start to play the new one.
Currently the sounds play without stopping any currently playing sounds, so that if I spam the buttons I get multiple sounds playing at the same time (and if I press too many at once, the app force closes).
I have tried using a few variations of:
if (mp.isPlaying()) {
mp.stop();
}
But according to what I read on a few other sources, I am creating multiple instances of the MediaPlayer class, and even though they have the same name the stop() method tries to stop on the latest instance of mp (in some cases it isn't even created yet).
I'm guessing my general implementation of the MediaPlayer class is wrong, but it's the best I could figure out to do.
Anyways, here's the relevant block of code:
public class soundTest extends Activity {
private ListView lv1;
private String lv_arr[]={"test 1","test 2","test 3","test 4","test 5"};
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
lv1=(ListView)findViewById(R.id.ListView01);
lv1.setAdapter(new ArrayAdapter<String>(this,R.layout.list_item, lv_arr));
lv1.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
if (lv1.getItemAtPosition(position)=="test 1") {
MediaPlayer mp = MediaPlayer.create(getApplicationContext(),R.raw.sound1);
mp.start();
mp.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
mp.release();
}
});
}
if (lv1.getItemAtPosition(position)=="test 2") {
MediaPlayer mp = MediaPlayer.create(getApplicationContext(),R.raw.sound2);
mp.start();
mp.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
mp.release();
}
});
}
//And the rest of the sounds 3,4,5.
}
});
}
}
Any help would be appreciated, thanks.
Edit (22nd March):
I've found the following piece of code that should work:
mp.setDataSource(context, Uri.parse("android.resource://" + Config.PACKAGE + "/" + resId));
But, I can't figure out how the "Config.PACKAGE" part works. I just get an error "PACKAGE cannot be resolved, or is not a field".
I tried replacing "PACKAGE" with the package name, same error. I also tried:
try {
mp.setDataSource(getApplicationContext(),Uri.parse("android.resource://com.mptest/" + R.raw.test2));
} catch (IOException e) {
e.printStackTrace();
}
But I can't work what exactly to put in place of "//com.mptest/".

The global variable MediaPlayer needs to be set private static. This has caught me several times.

Don't use a global. Use the singleton pattern. That is what it is for, so that you can have exactly one instance w/o using a global variable.
There are lots of good examples of Java code for this pattern, start with http://www.javaworld.com/javaworld/jw-04-2003/jw-0425-designpatterns.html and you can't go wrong.

Consider keeping your MediaPlayer as a global variable instead of having multiple instances of it.

You might find a good reference in the VideoView Source, since it handles one MediaPlayer object and you may change content during playback.