如何在Android上播放音频

Question

我开发了和android的游戏应用程序。当用户玩游戏且用户可以在禁用音乐复选框中禁用音乐时，我想在后台播放音乐。你能告诉我如何在游戏活动中做到这一点吗？

问候

Answer 1

这种技术是用来播放背景音的。

private SoundBroadCastReceiver soundBroadCast;
private void registerBroadCast() {
    soundBroadCast = new SoundBroadCastReceiver();
    IntentFilter intentfilter = new IntentFilter();
    intentfilter.addAction("android.intent.action.USER_PRESENT");
    registerReceiver(soundBroadCast, intentfilter);
}

    private class SoundBroadCastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        startMusic();
    }
}

 MediaPlayer mediaPlayer = new MediaPlayer();  
private void startMusic() {
    if (mediaPlayer != null) {
        mediaPlayer = null;
    }
    mediaPlayer = MediaPlayer.create(this, R.raw.main_screen);
    mediaPlayer.setLooping(true);
    if (!mediaPlayer.isPlaying()) {

            mediaPlayer.start();


    }
}

private void stopMusic() {
    if (mediaPlayer != null && mediaPlayer.isPlaying()) {
        mediaPlayer.stop();
        mediaPlayer.release();
        mediaPlayer = null;
    }
}







@Override
protected void onResume() {

    if (!((KeyguardManager) getSystemService("keyguard"))
            .inKeyguardRestrictedInputMode()) {
        startMusic();
    }

    registerBroadCast();
    super.onResume();

}

@Override
protected void onPause() {
    unregisterReceiver(soundBroadCast);
    stopMusic();
    System.gc();
    super.onPause();


}

Answer 2

您可以使用布尔变量，如mMusicButtonOn，并将其初始设置为false，并在游戏开始方法和禁用音乐复选框中设置如下所示

if( !mMusicButtonOn ){

    //do Music On
    mMusicButtonOn=true;
    mMainGameScene.playMusic(MusicFileNames.MAIN_MENU_SOUND);

}
else {
    //do Music Off
    mMusicButtonOn=false;
    mMainGameScene.pauseAllMusic();
    }