Media Player called in state 0 error -38 0

Question

I am currently trying to design a simple app that streams an internet radio station  I have the URL for the station and am setting up the Media Player like      MediaPlayer mediaPlayer   new MediaPlayer        try           mediaPlayer setDataSource URL         catch  IllegalArgumentException e            e printStackTrace          catch  SecurityException e            e printStackTrace          catch  IllegalStateException e            e printStackTrace          catch  IOException e            e printStackTrace              try           mediaPlayer prepare          catch  IllegalStateException e            e printStackTrace          catch  IOException e            e printStackTrace              mediaPlayer start      The program isn t crashing when emulated  but nothing is playing and I am get the following error   start called in state 0   and right below it is  Error  -38 0    Does anyone know what this means    I ve read a little about these state errors  but couldn t find anything that applies to my project

User · Answer

For me this worked  mp seekTo 0   mp start

User · Answer

above the picture you can get the right way

User · Answer

I got this error when I was trying to get the current position  MediaPlayer getCurrentPosition    of media player when it wasn t in the prepared stated  I got around this by Keeping track of its state and only calling the getCurrentPosition   method after onPreparedListener is called

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Some times file are encoded in a way that Android can t decode  Even some mp4 files can not be played  Please try a different file format   3gp are played most of the time  and see

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It was every much frustrated  So  I got solution which works for me    try                           if  mediaPlayer    null                                mediaPlayer release                                mediaPlayer   null                                                     mediaPlayer   new MediaPlayer                            mediaPlayer setDataSource file getAbsolutePath                             mediaPlayer setAudioStreamType AudioManager STREAM NOTIFICATION                           mediaPlayer setOnPreparedListener new MediaPlayer OnPreparedListener                                  Override                             public void onPrepared MediaPlayer mediaPlayer                                    mediaPlayer start                                    mediaPlayer setOnCompletionListener new MediaPlayer OnCompletionListener                                          Override                                     public void onCompletion MediaPlayer mediaPlayer                                            mediaPlayer stop                                            mediaPlayer release                                            mediaPlayer   null                                                                                                                                                              mediaPlayer prepare                          catch  Exception e                            e printStackTrace

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I also got this error i tried with onPreparedListener but still got this error  Finally i got the solution that error is my fault because i forgot the internet permission in Android Manifest xml       lt uses-permission android name  android permission INTERNET    gt    I used sample coding for mediaplayer  I used in StreamService java   onCreate method  String url    http   s17 myradiostream com 11474    mediaPlayer   new MediaPlayer                mediaPlayer setAudioStreamType AudioManager STREAM MUSIC   mediaPlayer setDataSource url   mediaPlayer prepare

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I am new in android programming and i had same error as this one  so i simply redefined the mp createmediaPlayer   MediaPlayer create getApplicationContext    Settings System DEFAULT RINGTONE URI   It may not the true way to do it but it worked fined for me   try     mp   MediaPlayer create getApplicationContext    Settings System DEFAULT RINGTONE URI     catch  Exception e      e printStackTrace       mp start

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if length gt 0                        mediaPlayer   new MediaPlayer                Log d  length     length               try                   mediaPlayer setDataSource getApplication   Uri parse uri                  catch IOException e                    e printStackTrace                              mediaPlayer setOnPreparedListener new MediaPlayer OnPreparedListener                      Override                 public void onPrepared MediaPlayer mediaPlayer                        mediaPlayer seekTo length                       mediaPlayer start                                                   mediaPlayer prepareAsync

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I encountered the same issue few days ago  My audio MediaPlayer works fine on devices with high processing power  but for slow devices  the media player just did not play some time and from LogCat it had many complain about called in wrong state  So I resolved it by calling putting the call to start    pause       in onPrepared   method of OnPreparedListener   as below   mediaPlayer prepare    mediaPlayer setOnPreparedListener new OnPreparedListener                      Override                 public void onPrepared MediaPlayer mp                                                     mediaPlayer start                                                 songControlBtn setOnClickListener new OnClickListener                              Override                         public void onClick View v                                if  mediaPlayer isPlaying                                      mediaPlayer pause                                   else                                   mediaPlayer start                                                                                                          mediaPlayer setOnCompletionListener new OnCompletionListener                              Override                         public void onCompletion MediaPlayer mp                                                                                                                                    Also try to release any media player that you do not need any more  For example  if you do not want to play the audio or video on background then you should call mediaPlayer release   in onPause

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I have change setAudioStreamType to setAudioAttributes  mediaPlayer setAudioAttributes AudioAttributes Builder                    setFlags AudioAttributes FLAG AUDIBILITY ENFORCED                   setLegacyStreamType AudioManager STREAM ALARM                   setUsage AudioAttributes USAGE ALARM                   setContentType AudioAttributes CONTENT TYPE SONIFICATION                   build

User · Answer

I met the same problem just before the friend at the first floor was right you called the start   at the wrong time you should set a listener for prepare   or prepareSync   with this method mediaPlayer setOnPreparedListener this   before prepare in this callback call start   It may resolve your problem  I have tried already

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It seems like Error -38 means a state-exception  as the error-message indicates   For example if you call start    before the song was ready  or when you call pause    even if the song isn t playing at all   To fix this issue check the state of the mediaPlayer before calling the methods  For example   if mediaPlayer isPlaying          mediaPlayer pause        Additionally  the MediaPlayer is sending event-messages  Even if you do not need the prepared-event  although it would be a good idea to not start the playback before this event was fired  you must set a callback-listener  This also holds true for the OnErrorListener  OnCompletionListener  OnPreparedListener and OnSeekCompletedListener  if you call the seek method    Listeners can be attached simply by  mediaPlayer setOnPreparedListener new OnPreparedListener          Override     public void onPrepared MediaPlayer mp               Do something  For example  playButton setEnabled true

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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

User · Answer

You get this message in the logs  because you do something that is not allowed in the current state of your MediaPlayer instance   Therefore you should always register an error handler to catch those things  as  tidbeck suggested    At first  I advice you to take a look at the documentation for the MediaPlayer class and get an understanding of what that with states means  See  http   developer android com reference android media MediaPlayer html StateDiagram  Your mistake here could well be one of the common ones  the others wrote here  but in general  I would take a look at the documentation of what methods are valid to call in what state  http   developer android com reference android media MediaPlayer html Valid and Invalid States  In my example it was the method mediaPlayer CurrentPosition  that I called while the media player was in a state  where it was not allowed to call this property

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mp   new MediaPlayer    AssetFileDescriptor afd   mContext getAssets   openFd fileName   mp reset    mp setDataSource afd getFileDescriptor    afd getStartOffset    afd getLength     mp prepare    mp setOnPreparedListener new MediaPlayer OnPreparedListener       public void onPrepared MediaPlayer mp        mp start             mp prepareAsync

User · Answer

You need to call mediaPlayer start   in the onPrepared method by using a listener  You are getting this error because you are calling mediaPlayer start   before it has reached the prepared state   Here is how you can do it    mp setDataSource url    mp setOnPreparedListener this   mp prepareAsync     public void onPrepared MediaPlayer player        player start

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This is my code tested and working fine   package com example com mak mediaplayer   import android media MediaPlayer  import android os Bundle  import android view View  import android widget Button  import android app Activity   public class MainActivity extends Activity       Override   protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity main       final MediaPlayer mpp   MediaPlayer create this  R raw red     mp3 file in res raw folder      Button btnplay    Button  findViewById R id btnplay     Play     btnplay setOnClickListener new View OnClickListener            Override       public void onClick View vone            mpp start                         Button btnpause    Button  findViewById R id btnpause     Pause     btnpause setOnClickListener new View OnClickListener             Override       public void onClick View vtwo            if  mpp isPlaying                mpp pause              mpp seekTo 0

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i tested below code  working fine   public class test extends Activity implements OnErrorListener  OnPreparedListener    private MediaPlayer player    Override public void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout main         player   new MediaPlayer        player setAudioStreamType AudioManager STREAM MUSIC       try           player setDataSource  http   www hubharp com web sound BachGavotte mp3            player setOnErrorListener this           player setOnPreparedListener this           player prepareAsync          catch  IllegalArgumentException e            e printStackTrace          catch  IllegalStateException e            e printStackTrace          catch  IOException e            e printStackTrace                    Override public void onDestroy         super onDestroy        player release        player   null     Override public void onPrepared MediaPlayer play        play start       Override public boolean onError MediaPlayer arg0  int arg1  int arg2        return false

[android] Media Player called in state 0, error (-38,0)

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