Android 对等设备上的 WiFi 直接图像共享

Posted 2023-02-23

【中文标题】Android 对等设备上的 WiFi 直接图像共享

【英文标题】：WiFi Direct Image Sharing on peer device in Android

【发布时间】：2016-12-01 04:11:41

【问题描述】：

我已经成功实现了 wifi direct 示例演示，两种方式的图像共享工作正常，但我的问题是当一个设备 A 发送连接到设备 B 的邀请而设备 B 取消该邀请时，我无法处理该事件的取消回调，因为它是 android 生成的。

任何可以帮助我解决问题的人。

以下是我的广播接收器代码和连接代码：

/**
 * A BroadcastReceiver that notifies of important wifi p2p events.
 */
public class WiFiDirectBroadcastReceiver extends BroadcastReceiver 

    private WifiP2pManager manager;
    private Channel channel;
    private WiFiDirectActivity activity;

    /**
     * @param manager WifiP2pManager system service
     * @param channel Wifi p2p channel
     * @param activity activity associated with the receiver
     */
    public WiFiDirectBroadcastReceiver(WifiP2pManager manager, Channel channel,
            WiFiDirectActivity activity) 
        super();
        this.manager = manager;
        this.channel = channel;
        this.activity = activity;
    

    /*
     * (non-Javadoc)
     * @see android.content.BroadcastReceiver#onReceive(android.content.Context,
     * android.content.Intent)
     */
    @Override
    public void onReceive(Context context, Intent intent) 
        String action = intent.getAction();
        if (WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION.equals(action)) 

            // UI update to indicate wifi p2p status.
            int state = intent.getIntExtra(WifiP2pManager.EXTRA_WIFI_STATE, -1);
            if (state == WifiP2pManager.WIFI_P2P_STATE_ENABLED) 
                // Wifi Direct mode is enabled
                activity.setIsWifiP2pEnabled(true);
             else 
                activity.setIsWifiP2pEnabled(false);
                activity.resetData();

            
            Log.d(WiFiDirectActivity.TAG, "P2P state changed - " + state);
         else if (WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION.equals(action)) 

            // request available peers from the wifi p2p manager. This is an
            // asynchronous call and the calling activity is notified with a
            // callback on PeerListListener.onPeersAvailable()
            if (manager != null) 
                manager.requestPeers(channel, (PeerListListener) activity.getFragmentManager()
                        .findFragmentById(R.id.frag_list));
            
            Log.d(WiFiDirectActivity.TAG, "P2P peers changed");
         else if (WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION.equals(action)) 

            if (manager == null) 
                return;
            

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

            if (networkInfo.isConnected()) 

                // we are connected with the other device, request connection
                // info to find group owner IP

                DeviceDetailFragment fragment = (DeviceDetailFragment) activity
                        .getFragmentManager().findFragmentById(R.id.frag_detail);
                manager.requestConnectionInfo(channel, fragment);
             else 
                // It's a disconnect
                activity.resetData();
            
         else if (WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION.equals(action)) 
            DeviceListFragment fragment = (DeviceListFragment) activity.getFragmentManager()
                    .findFragmentById(R.id.frag_list);
            fragment.updateThisDevice((WifiP2pDevice) intent.getParcelableExtra(
                    WifiP2pManager.EXTRA_WIFI_P2P_DEVICE));

        
    

对于连接，我使用了以下代码：

 WifiP2pConfig config = new WifiP2pConfig();
        config.deviceAddress = device.deviceAddress;
        config.wps.setup = WpsInfo.PBC;
        if (progressDialog != null && progressDialog.isShowing()) 
            progressDialog.dismiss();
        
      device.wps.setup = WpsInfo.PBC;
        device.groupOwnerIntent = 0; // I want this device to become the owner
        manager.connect(channel, device, new ActionListener() 

            @Override
            public void onSuccess() 
                // WiFiDirectBroadcastReceiver will notify us. Ignore for now.
            

            @Override
            public void onFailure(int reason) 
                Toast.makeText(WiFiDirectActivity.this, "Connect failed. Retry.",
                        Toast.LENGTH_SHORT).show();
            
        );

【参考方案1】：

该类需要实现ConnectionInfoListener。在 onConnectionInfoAvailable(final WifiP2pInfo info) 函数中，您可以检查是否建立了成功的连接。 WifiP2pInfo 类型的 info 参数包含有关连接的信息。它包含一个名为 groupFormed 的布尔值，指示 p2p 组是否已成功形成。如果设备是groupOwner和groupOwner的IP等，也可以从中检索。

@覆盖 公共无效 onConnectionInfoAvailable（最终 WifiP2pInfo 信息）

    // After the group negotiation, we check if this device 
    // is acting as group owner

    if (info.groupFormed && !info.isGroupOwner) 

        // Do whatever you want the group owner to do

     else if (info.groupFormed) 
        // The device now act as the slave device, 
        // and the other connected device is group owner

Google 提供了一个非常好的演示应用程序，它使用 WiFi Direct 在 2 个设备之间发送图像。检查它的实现并尝试在它之上构建。链接：http://developer.android.com/guide/topics/connectivity/wifip2p.html

希望这会有所帮助。如果您有任何问题，请告诉我。

来自：

Check whether android wifip2p connection was successful?