Error: mediaplayer start called in state 0 error(-38,0)

Question

i am new to android i have written the code on which links the mediaplayer to play songs

i have created a folder path="//localhost/Android/sd/vande.mp3 file is present

public class MainActivity extends Activity {
Button start,pause,stop;
boolean flag;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    start=(Button)findViewById(R.id.button1);
    pause=(Button)findViewById(R.id.button2);
    stop=(Button)findViewById(R.id.button3);

    final MediaPlayer mp=new MediaPlayer();
    try{
    mp.setDataSource(Environment.getExternalStorageDirectory().getPath()+"/Android/music/vande.mp3");

    mp.prepare();

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

    mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() 
    { 
        public void onPrepared(MediaPlayer player) 
        {  
            //mp.start();
            flag = true; 
        } 

    });
    if(flag ==true)
    {
        start.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                mp.start();
            }
        });
    }
    else
    {
        stop.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                mp.stop();
            }
        });
    }

    pause.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            mp.pause();
        }
    });
}}

but file is not playing when i checked the logcat there is an error popped up "start called in state 0 error (-38,0)

can anyone help to resolve this code

thanks in advance

Answer 1

You need to wait till the media player is prepared before calling start

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

If you want to start the player on button click. You can have a flag. boolean flag=false;

Then

 public void onPrepared(MediaPlayer player) 
 { 
   flag= true; 
 }

Then in onClick

if(flag ==true)
{
  mp.start();
}else
{
     // media player not prepared
}