android广播通知

1.发送方
    Intent intent =new Intent();
    intent.setAction("action.refreshFriend");
    getContext().sendBroadcast(intent);
2.接收方
    onCreate（）方法中：
    IntentFilter intentFilter =new IntentFilter();
    intentFilter.addAction("action.refreshFriend");
    registerReceiver(mRefreshBroadcastReceiver, intentFilter);
    添加方法：
   private BroadcastReceivermRefreshBroadcastReceiver =new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                String action = intent.getAction();
                if (action.equals("action.refreshFriend"))
                {
                    //要执行的逻辑
                 }
            }
    };
    onDestroy（）方法中：
    unregisterReceiver(mRefreshBroadcastReceiver);