WiFi Direct for multiple devices

Question

I am trying to establish file transfer (between 3 devices) through Wifi Direct from the tutorial given in

http://developer.android.com/training/connect-devices-wire

Answer 1

Since B is the group owner(GO) and A and C are clients, B can get clients' address by the callback function of WifiP2pManager.requestGroupInfo() .

Request group info after connected like this.

mWifiP2pManager.requestGroupInfo(mChannel,new WifiP2pManager.GroupInfoListener() {
        @Override
        public void onGroupInfoAvailable(WifiP2pGroup wifiP2pGroup) {
            Collection peerList = wifiP2pGroup.getClientList();
            ArrayList list = new ArrayList(peerList);
            String host;
            for (int i = 1; i < list.size(); i++) {
                host = list.get(i).deviceAddress;
                /** transferFile here **/
            }
        }
    });