Question

我只是想实现Wifi P2P而且我一直坚持获得同行列表。当我点击发现设备按钮然后我只想获取所有设备附加设备列表到一个字符串，我可以使用文本视图输出。

MainActivity.java

package com.example.lrmah.wifip2p;


public class MainActivity extends AppCompatActivity implements 
WifiP2pManager.PeerListListener {

private List<WifiP2pDevice> peers = new ArrayList<WifiP2pDevice>();
WifiP2pManager mManager;
WifiP2pManager.Channel mChannel;
BroadcastReceiver mReceiver;
Button B;
TextView t;


IntentFilter mIntentFilter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    t=(TextView) findViewById(R.id.displayTextView);
    B=(Button) findViewById(R.id.discoverPeers);

    mManager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
    mChannel = mManager.initialize(this, getMainLooper(), null);
    mReceiver = new WiFiDirectBroadcastReceiver(mManager, mChannel, this);

    mIntentFilter = new IntentFilter();
    mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
    mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
    mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
    mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);

    B.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            mManager.discoverPeers(mChannel, new WifiP2pManager.ActionListener() {
                @Override
                public void onSuccess() {
                    Toast.makeText(getApplicationContext(),"success",Toast.LENGTH_SHORT).show();
                }

                @Override
                public void onFailure(int reasonCode) {
                }
            });

        }
    });




}

@Override
protected void onResume() {
    super.onResume();
    registerReceiver(mReceiver, mIntentFilter);
}


/* unregister the broadcast receiver */
@Override
protected void onPause() {
    super.onPause();
    unregisterReceiver(mReceiver);
}

@Override
public void onPeersAvailable(WifiP2pDeviceList peerList) {
    List<WifiP2pDevice> refreshedPeers = (List<WifiP2pDevice>) peerList.getDeviceList();
    if (!refreshedPeers.equals(peers)) {
        peers.clear();
        peers.addAll(refreshedPeers);
    }

    WifiP2pDevice device= refreshedPeers.get(0);
    t.setText(device.deviceName);
    if (peers.size() == 0) {
        return;
    }
}}

WifiDirectBroadcastReceiver

package com.example.lrmah.wifip2p;


public class WiFiDirectBroadcastReceiver extends BroadcastReceiver {

private WifiP2pManager mManager;
private WifiP2pManager.Channel mChannel;
private MainActivity mActivity;
WifiP2pManager.PeerListListener myPeerListListener;

public WiFiDirectBroadcastReceiver(WifiP2pManager manager, WifiP2pManager.Channel channel,
                                   MainActivity activity) {
    super();
    this.mManager = manager;
    this.mChannel = channel;
    this.mActivity = activity;
}

@Override
public void onReceive(Context context, Intent intent) {
    String action = intent.getAction();

    if (WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION.equals(action)) {
        int state = intent.getIntExtra(WifiP2pManager.EXTRA_WIFI_STATE, -1);
        if (state == WifiP2pManager.WIFI_P2P_STATE_ENABLED) {
            Toast.makeText(mActivity,"wifi is on",Toast.LENGTH_LONG).show();
        } else {
            Toast.makeText(mActivity,"Please turn on wifi",Toast.LENGTH_LONG).show();
        }
    } else if (WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION.equals(action)) {
        if (mManager != null) {
            mManager.requestPeers(mChannel, mActivity);
        }
    }
    else if (WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION.equals(action)) {
        // Respond to new connection or disconnections
    } else if (WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION.equals(action)) {
        // Respond to this device's wifi state changing
    }
}}

我可能错了，但我认为没有调用onPeerAvailable。

Answer 1

有些观点：

else if (WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION.equals(action)) { //在这里你应该打电话

NetworkInfo networkInfo = intent.getParcelableExtra(WifiP2pManager.EXTRA_NETWORK_INFO);

if (networkInfo.isConnected() && isSender) {
    // connected with the other device, request connection info to find group owner IP
    manager.requestConnectionInfo(channel, yourWifiP2pManager.ConnectionInfoListene);
}

else if (WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION.equals(action)) { //在这里调用discoverPeers

manager.discoverPeers(channel, new WifiP2pManager.ActionListener() {
    @Override
    public void onSuccess() {
        if (manager != null) {
            manager.requestPeers(channel, yourWifiP2pManager.PeerListListener);
        }
    }
    @Override
    public void onFailure(int reasonCode) {}
});

然后设备列表将在

中广播

else if (WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION.equals(action)) {
    WifiP2pDeviceList list = intent.getParcelableExtra(WifiP2pManager.EXTRA_P2P_DEVICE_LIST);
    for (WifiP2pDevice d : list.getDeviceList()) { //...

无法从WifiP2pDeviceList获取设备

1 个答案: