Wifip2p发现对等点不工作

Question

我看到了代码这里。公共无效的displayPeers(最终的WifiP2pDeviceList对等点)是如何在这里工作的。当我在设备中运行时，它会显示在listview中的设备中，但是它如何在没有initializ方法的情况下获得设备列表。显示同伴()而不打电话？

之后，我更改了我的项目的代码，Displaypeers方法无法工作/调用。但是当我导入完整的项目时，它就能工作了。它是怎么工作的？请帮帮我。如果我犯了错误，有人能告诉我怎么称呼这个方法吗？显示节点(最终的WifiP2pDeviseList对等点)在oncreate函数本身中。谢谢。对不起我的英语不好。

 public void searchForPeers(View view) {

    //Discover peers, no call back method given
    wifiManager.discoverPeers(wifichannel, null);

}

…………

public void displayPeers(final WifiP2pDeviceList peers)
{
    //Dialog to show errors/status
    final AlertDialog.Builder dialog = new AlertDialog.Builder(this);
    dialog.setTitle("WiFi Direct File Transfer");

    //Get list view
    ListView peerView = (ListView) findViewById(R.id.peers_listview);

    //Make array list
    ArrayList<String> peersStringArrayList = new ArrayList<String>();

    //Fill array list with strings of peer names
    for(WifiP2pDevice wd : peers.getDeviceList())
    {
        peersStringArrayList.add(wd.deviceName);
    }

    //Set list view as clickable
    peerView.setClickable(true);

    //Make adapter to connect peer data to list view
    ArrayAdapter arrayAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, peersStringArrayList.toArray());                

    //Show peer data in listview
    peerView.setAdapter(arrayAdapter);


    peerView.setOnItemClickListener(new OnItemClickListener() {

        public void onItemClick(AdapterView<?> arg0, View view, int arg2,long arg3) {

            //Get string from textview
            TextView tv = (TextView) view;

            WifiP2pDevice device = null;

            //Search all known peers for matching name
            for(WifiP2pDevice wd : peers.getDeviceList())
            {
                if(wd.deviceName.equals(tv.getText()))
                    device = wd;                        
            }

            if(device != null)
            {
                //Connect to selected peer
                connectToPeer(device);

            }
            else
            {
                dialog.setMessage("Failed");
                dialog.show();

            }                           
        }           
            // TODO Auto-generated method stub              
        });

}

编辑: Oncreate方法

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_client);
    // getActionBar().setDisplayHomeAsUpEnabled(true);

    wifiManager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);

    wifichannel = wifiManager.initialize(this, getMainLooper(), null);
    wifiClientReceiver = new WiFiClientBroadcastReceiver(wifiManager, wifichannel, this);

    wifiClientReceiverIntentFilter = new IntentFilter();
    wifiClientReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
    wifiClientReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
    wifiClientReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
    wifiClientReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);
    connectedAndReadyToSendFile = false;
    filePathProvided = false;
    fileToSend = null;
    transferActive = false;
    clientServiceIntent = null;
    targetDevice = null;
    wifiInfo = null;

    registerReceiver(wifiClientReceiver, wifiClientReceiverIntentFilter);

    setClientFileTransferStatus("Client is currently idle");

    //setTargetFileStatus("testing");
}

Answer 1

你应该看看整个项目。除了ClientActivity之外，还有更多的类。它们都进行交互，形成一个工作应用程序。

displayPeers()是从WiFiClientBroadcastReceiver调用的。我建议你看看这里的所有文件：

https://github.com/mayfourth/WiFi-Direct-File-Transfer/tree/master/WiFiDirectFileTransfer/src/edu/pdx/cs410/wifi/direct/file/transfer