Error while trying to start media player: start called in state error (-38, 0)

Question

I have a GridView with your positions and I do case on the onCreate, So,

case position = 1 play audio1,

case position = 2 play audio2

But when I execute, diplay a error and stop play sounds.

start called in state error (-38, 0)

The Activity:

public class HomeEnglishFoodsActivity extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_english_foods);

GridView gridView = (GridView) findViewById(R.id.gridviewHomeEnglishFoods);
gridView.setAdapter(new AdapterHomeEnglishFoodsActivity(this));

final MediaPlayer mpApple = MediaPlayer.create(this, R.raw.apple);
final MediaPlayer mpBeer = MediaPlayer.create(this, R.raw.beer);
final MediaPlayer mpCoffee = MediaPlayer.create(this, R.raw.coffee);
final MediaPlayer mpCheese = MediaPlayer.create(this, R.raw.cheese);
final MediaPlayer mpFrenchfries = MediaPlayer.create(this, R.raw.frenchfries);
final MediaPlayer mpIcecream = MediaPlayer.create(this, R.raw.icecream);
final MediaPlayer mpHotdog = MediaPlayer.create(this, R.raw.hotdog);
final MediaPlayer mpWine = MediaPlayer.create(this, R.raw.wine);

gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    public void onItemClick(AdapterView<?> parent, View v,
                            int position, long id) {
        switch (position) {
            case 0:
                mpApple.start();
                break;
            case 1:
                mpBeer.start();
                break;
            case 2:
                mpCoffee.start();
                break;
            case 3:
                mpCheese.start();
                break;
            case 4:
                mpFrenchfries.start();
                break;
            case 5:
                mpIcecream.start();
                break;
            case 6:
                mpHotdog.start();
                break;
            case 7:
                mpWine.start();
                break;
        }

    }
});
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_home_english_foods, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();

//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
    return true;
}

return super.onOptionsItemSelected(item);
}
}

Error:

06-04 00:46:21.334  17752-17752/br.gabrielrossetto.tap4learn E/MediaPlayer﹕    Error (-19,0)
06-04 00:46:29.612  17752-17752/br.gabrielrossetto.tap4learn E/MediaPlayer﹕ start called in state 0
06-04 00:46:29.612  17752-17752/br.gabrielrossetto.tap4learn E/MediaPlayer﹕ error (-38, 0)
06-04 00:46:29.652  17752-17752/br.gabrielrossetto.tap4learn E/MediaPlayer﹕ Error (-38,0)

Answer 1

This error usually means you are trying to call a function while in wrong state, for example calling seek while media player not ready yet. Try to add mpApple.setOnPreparedListener() listener then called start() once it is prepared, also you will need to release the player once you are done as they recommend in documentation, so I suggest you make one MediaPlayer instance, and stop + release it before using it to play new audio file. for example

 public class HomeEnglishFoodsActivity extends ActionBarActivity
 {
       MediaPlayer player;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
{
        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View int position, long id) {
                switch (position)
                {
                    case 0:
                        if(player1 !=null)
                        {
                            player1.stop();
                            player1.release();
                        }
                        player1.create(this, R.raw.apple).setOnPreparedListener(new OnPreparedListener() {
                            @Override
                            public void onPrepared(MediaPlayer mediaPlayer)
                            {
                                mediaPlayer.start();
                            }
                        });
                }
            }
        });
}
}