SoundPool not playing sound (while MediaPlayer does)

问题

I am trying to play a sound in an app. However, using SoundPool I am unable to do so. The code is really simple and I don't see where it can fail.

A similar code but using MediaPlayer does work, but I am interested in using SoundPool.

SoundPool code:

private void playSound2(){
    SoundPool sp = new SoundPool.Builder().build();
    int soundID = sp.load(MainActivity.this, R.raw.sound, 1);
    sp.play(soundID, 1, 1, 1, 0, 1);
}

Context:

public void goButtonClick(View view){
    Button goButton = findViewById(id.button2);
    if (onGoing){
        goButton.setText("GO!");
    } else {
        goButton.setText("STOP");
        //playSound();   // MediaPlayer
        playSound2();    // SoundPool
    }
    onGoing = !onGoing;
}

MediaPlayer version (works):

private void playSound(){
    MediaPlayer mediaPlayer;
    mediaPlayer = MediaPlayer.create(MainActivity.this, R.raw.sound);
    mediaPlayer.start();
}

回答1:

Solved!

I was missing to wait for the loading of the sound file into soundPool. The correct code is:

private void playSound2() {
    SoundPool sp = new SoundPool.Builder().build();
    int soundID = sp.load(MainActivity.this, raw.sound, 1);
    sp.setOnLoadCompleteListener(new SoundPool.OnLoadCompleteListener() {
        @Override
        public void onLoadComplete(SoundPool sp, int soundID, int i1) {
            sp.play(soundID, 1, 1, 1, 0, 1);
        }
    });
}

来源：https://stackoverflow.com/questions/55200787/soundpool-not-playing-sound-while-mediaplayer-does