在媒体播放器中加载多个音乐媒体

Question

it does not load up the songs declare in the switch case

 final ArrayList<Integer> playlist; playlist = new ArrayList<>(); playlist.add(R.raw.honey); playlist.add(R.raw.anger); playlist.add(R.raw.contempt); playlist.add(R.raw.disgust); playlist.add(R.raw.fear); playlist.add(R.raw.happy); playlist.add(R.raw.sadness); playlist.add(R.raw.surprise); MediaPlayer mediaPlayer = null; Button play = findViewById(R.id.play); Button pause = findViewById(R.id.pause); Button jumpToMainActivity = findViewById(R.id.jumpToMainActivity); mediaPlayer = MediaPlayer.create(this,playlist.get(0)); switch (final_detected_emotion){ case "anger": mediaPlayer.reset(); mediaPlayer.create(this,playlist.get(1)); break; case "contempt": mediaPlayer.reset(); mediaPlayer.create(this,playlist.get(2)); break; case "disgust": mediaPlayer.reset(); mediaPlayer.create(this,playlist.get(3)); break; case "fear": mediaPlayer.reset(); mediaPlayer.create(this,playlist.get(4)); break; case "happy": mediaPlayer.reset(); mediaPlayer.create(this,playlist.get(5)); break; case "sadness": mediaPlayer.reset(); mediaPlayer.create(this,playlist.get(6)); break; case "surprise": mediaPlayer.reset(); mediaPlayer.create(this,playlist.get(7)); break; } final MediaPlayer finalMediaPlayer = mediaPlayer; play.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { finalMediaPlayer.start(); } });

it only play the honey song. the string (final_detected_emotion) passed changes but the song does not changes.

will i delete the mediaplayer object

i have made the app which play songs on detected emotion

Answer 1

    switch (final_detected_emotion){
        case "anger":
           mediaPlayer = MediaPlayer.create(this,playlist.get(1));
            break;
        case "contempt":
           mediaPlayer = MediaPlayer.create(this,playlist.get(2));
            break;
        case "disgust":
            mediaPlayer = MediaPlayer.create(this,playlist.get(3));
            break;
        case "fear":
            mediaPlayer = MediaPlayer.create(this,playlist.get(4));
            break;
        case "happy":
            mediaPlayer = MediaPlayer.create(this,playlist.get(5));
            break;
        case "sadness":
           mediaPlayer = MediaPlayer.create(this,playlist.get(6));
            break;
        case "surprise":
            mediaPlayer = MediaPlayer.create(this,playlist.get(7));
            break;
        default :
            mediaPlayer = MediaPlayer.create(this,playlist.get(0));
    }