Android SoundPool实现简短小音效

public class MainActivity extends Activity implements OnClickListener{
  private Button mbtn_start;
  private SoundPool spool;
  private int id;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mbtn_start=(Button) findViewById(R.id.bt_start);
    id=initSoundpool();
    mbtn_start.setOnClickListener(this);
  }

  // @TargetApi(Build.VERSION_CODES.L)
  private int initSoundpool() {
    //Sdk版本>=21时使用下面的方法
  if(Build.VERSION.SDK_INT>=21){
  SoundPool.Builder builder=new SoundPool.Builder();
  //设置最多容纳的流数
    builder.setMaxStreams(2);
    AudioAttributes.Builder attrBuilder=new AudioAttributes.Builder();
    attrBuilder.setLegacyStreamType(AudioManager.STREAM_MUSIC);
    builder.setAudioAttributes(attrBuilder.build());
    pool=builder.build();
  }else{

    spool=new SoundPool(2,AudioManager.STREAM_MUSIC, 0);


  }
  //加载音频文件，返回音频文件的id
    int id=spool.load(getApplicationContext(),R.raw.mali,1);

    return id;
  }


  @Override
  public void onClick(View v) {
    switch (v.getId()) {
    case R.id.bt_start:
  //SoundPool的创建需要时间，因此不能将SoundPool初始化后直接start
  /*参数： (int soundID, float leftVolume, float rightVolume, int priority, int loop, float rate)*/

        spool.play(id, 1, 1, 0, -1, 1); 

      break;

    default:
      break;
    }

  } 
}