EventBus使用（替代了广播）

#1.注册

 private void initData() {
//        mReceiver=new MyReceiver();
//        IntentFilter intentFilter=new IntentFilter();
//        intentFilter.addAction(OPEN_AUDIO);
//        registerReceiver(mReceiver,intentFilter);
        EventBus.getDefault().register(this);
    }

#2.订阅方法

@Subscribe(threadMode= ThreadMode.MAIN,priority = 0)
private void showData() {
        showViewData();
        checkPlaymode();
    }

#3.发送消息

 class MyOnPreparedListener implements MediaPlayer.OnPreparedListener {
        @Override
        public void onPrepared(MediaPlayer mp) {
            //通知Activity来获取信息--广播
//            notifyChange(OPEN_AUDIO);
            EventBus.getDefault().post(mediaItem);
            start();
        }
    }

#4.取消注册

 @Override
    protected void onDestroy() {
        LogUtil.e("onDestroy。。。AudioPlayerActivity");
        super.onDestroy();
        unbindService(con);
        EventBus.getDefault().unregister(this);
//        if(mReceiver!=null){
//            unregisterReceiver(mReceiver);
//        }
    }