加载声音的过程!

 public void initSound(){
		bgMusic[0]=MediaPlayer.create(this, R.raw.screen_bg);
		bgMusic[0].setLooping(true);
		bgMusic[0].setVolume(0.3f, 0.3f);
		
		soundPool=new SoundPool(4, AudioManager.STREAM_MUSIC, 100);
		soundMap=new HashMap<Integer, Integer>();
		soundMap.put(<span style="color:#ff0000;">0</span>, soundPool.load(this, R.raw.awp_fire,1));
		soundMap.put(<span style="color:#ff0000;">1</span>, soundPool.load(this, R.raw.awp_fire,1));
	}
	
	public void playSound(int <span style="color:#ff0000;">sound</span>,int <span style="color:#000099;">loop</span>){
		if(!musicFlag){
			return;
		}
		AudioManager manager=(AudioManager) this.getSystemService(Context.AUDIO_SERVICE);
		float streamVolumeCurrent=manager.getStreamVolume(AudioManager.STREAM_MUSIC);
		float streamVolumeMax=manager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
		float volume=streamVolumeCurrent/streamVolumeMax;
		soundPool.play(soundMap.get(<span style="color:#ff0000;">sound</span>), volume, volume, 1, <span style="color:#000099;">loop</span>, 0.5f);
	}

act_Main.playSound(1, 0);