问题描述

在activity开始时播放声音

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
View view = findViewById(R.id.textView1);
view.setOnTouchListener(this);

this.setVolumeControlStream(AudioManager.STREAM_MUSIC);

soundPool = new SoundPool(10, AudioManager.STREAM_MUSIC, 0);
soundPool.setOnLoadCompleteListener(new OnLoadCompleteListener() {
    @Override
    public void onLoadComplete(SoundPool soundPool, int sampleId,
            int status) {
        loaded = true;
    }
});
soundID = soundPool.load(this, R.raw.dog_bark, 1);

 }
;
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {

    AudioManager audioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
    float actualVolume = (float) audioManager
            .getStreamVolume(AudioManager.STREAM_MUSIC);
    float maxVolume = (float) audioManager
            .getStreamMaxVolume(AudioManager.STREAM_MUSIC);
    float volume = actualVolume / maxVolume;

    if (loaded) {
        soundPool.play(soundID, volume, volume, 1, 0, 1f);
    }
}
return false;

}
}

代码实现的是在点击事件后声音才会播放。我想要在activity开始后自动播放。然后在播放一遍后，再次点击事件时再播放，谢谢