java.lang.IllegalStateException dans la méthode MediaPlayer.isplaying ()

public static MediaPlayer mp=null;
public static void playGeneric(int name, final ImageButton button,final ImageButton pervious,Context context) {
    button.setEnabled(false);
button.setClickable(false);
pervious.setEnabled(false);
pervious.setClickable(false);
    try{
        if(mp != null && mp.isPlaying())
        {
            mp.stop();
            mp.release();
            mp = null;
           mp=MediaPlayer.create(context, name);
           mp.start();
        }
        else
        {
            mp = MediaPlayer.create(context, name);
            mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                @Override
                public void onPrepared(MediaPlayer arg0) {
                    //mp.prepare();
                    mp.start();

                }

            });
        mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {

            @Override
            public void onCompletion(MediaPlayer mp) {
                //TODO Auto-generated method stub
                mp.release();
                System.out.println("Object released");
                button.setEnabled(true);
                button.setClickable(true);
                pervious.setEnabled(true);
                pervious.setClickable(true);
            }
        });
        }

    } catch (IllegalStateException e) {
        //TODO Auto-generated catch block
        e.printStackTrace();
    }catch (SecurityException e) {
        //TODO Auto-generated catch block
        e.printStackTrace();
        e.getMessage();
    } catch (NullPointerException e) {
        //TODO Auto-generated catch block
        e.printStackTrace();
        e.getMessage();
    }

}

me donner java.lang.IllegalStateException sur mp.isplaying() la méthode.

Je veux arrêter de la musique, si c'est de jouer et de jouer un autre morceau l'un après l'autre.

logcat:

10-14 15:12:05.474: E/MediaPlayer(15411): prepareAsync called in state 8
10-14 15:12:05.474: W/System.err(15411): java.lang.IllegalStateException
10-14 15:12:05.474: W/System.err(15411):    at android.media.MediaPlayer.prepare(Native Method)
10-14 15:12:05.474: W/System.err(15411):    at com.rogerscenter.LearnReadWriteSpell.Utility.Music.playGeneric(Music.java:93)
10-14 15:12:05.474: W/System.err(15411):    at com.rogerscenter.LearnReadWriteSpell.LetterCategory.Letter_Lesson1_activity.onCreate(Letter_Lesson1_activity.java:140)
10-14 15:12:05.474: W/System.err(15411):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-14 15:12:05.474: W/System.err(15411):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1586)
10-14 15:12:05.474: W/System.err(15411):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1638)
10-14 15:12:05.474: W/System.err(15411):    at android.app.ActivityThread.access$1500(ActivityThread.java:117)
10-14 15:12:05.474: W/System.err(15411):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:928)
10-14 15:12:05.484: W/System.err(15411):    at android.os.Handler.dispatchMessage(Handler.java:99)
10-14 15:12:05.484: W/System.err(15411):    at android.os.Looper.loop(Looper.java:123)
10-14 15:12:05.484: W/System.err(15411):    at android.app.ActivityThread.main(ActivityThread.java:3647)
10-14 15:12:05.484: W/System.err(15411):    at java.lang.reflect.Method.invokeNative(Native Method)
10-14 15:12:05.484: W/System.err(15411):    at java.lang.reflect.Method.invoke(Method.java:507)
10-14 15:12:05.484: W/System.err(15411):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-14 15:12:05.484: W/System.err(15411):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-14 15:12:05.484: W/System.err(15411):    at dalvik.system.NativeStart.main(Native Method)

source d'informationauteur Sydroid

  1. 7

    Comme android docs suggèrent que, si le député est si n'a pas été initialisé au moment de java.lang.IllegalStateException sera levée, de sorte que vous avez à initilize premier ou vous devez écrire

    découvrez les docs http://developer.android.com/reference/android/media/MediaPlayer.html#isPlaying()

    essayez comme ceci

     mp=MediaPlayer.create(context, name);
try {
if (mp.isPlaying()) {
mp.stop();
mp.release();
mp=MediaPlayer.create(context, name);
}
mp.start();
} catch (Exception e) {
}
  2. 7

    Essayez de changer mp.release() en reset(). qui pourrait vous aider.

  3. -1

    utilisation runOnUiThread pour mediaRecorder préparer.

    private boolean prepareMediaRecorder() {
mediaRecorder = new MediaRecorder();
runOnUiThread(new Runnable() {
@Override
public void run() {
mediaRecorder.reset();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
mediaRecorder.setOutputFile(filePath);
try {
mediaRecorder.prepare();
} catch (IOException e) {
mediaRecorder = null;
return;
}
mediaRecorder.start();
recording = true;
}
});
return true;
}