Android的WIFI直接

我一直在运行此WifiDirectDemo是有GitHub上几乎没有修改。我现在面临的问题是创建套接字连接..我这样想时。所以，当我一个手机上选择图像将其传送到另一部手机，我的应用程序越来越关闭其他手机与此异常：Android的WIFI直接

java.net.SocketException异常SENDTO失败ECONNRESET（由对等连接复位）。

我有两个连接通过wifi手机直接。

这是在我得到一个错误代码：

这是调用FileTransferService：

String localIP = Utils.getLocalIPAddress(); 
    // Trick to find the ip in the file /proc/net/arp 
    String client_mac_fixed = new  String(this.device.deviceAddress).replace("99", "19"); 
    String clientIP = Utils.getIPFromMac(client_mac_fixed); 


    Uri uri = data.getData(); 
    TextView statusText = (TextView) mContentView.findViewById(R.id.status_text); 
    statusText.setText("Sending: " + uri); 
    Log.d(WifiDirectActivity.TAG, "Intent----------- " + uri); 
    Intent serviceIntent = new Intent(getActivity(), FileTransferService.class); 
    serviceIntent.setAction(FileTransferService.ACTION_SEND_FILE); 
    serviceIntent.putExtra(FileTransferService.EXTRAS_FILE_PATH, uri.toString()); 

    if(localIP.equals(IP_SERVER)){ 
     serviceIntent.putExtra(FileTransferService.EXTRAS_ADDRESS, clientIP); 
    }else{ 
     serviceIntent.putExtra(FileTransferService.EXTRAS_ADDRESS, IP_SERVER); 
    } 

    serviceIntent.putExtra(FileTransferService.EXTRAS_PORT, PORT); 
    getActivity().startService(serviceIntent);

后台任务来打开服务器套接字：

protected String doInBackground(Void... params) { 
     try { 
      ServerSocket serverSocket = new ServerSocket(PORT); 
      Log.d(WifiDirectActivity.TAG, "Server: Socket opened"); 
      Socket client = serverSocket.accept(); 
      Log.d(WifiDirectActivity.TAG, "Server: connection done"); 
      final File f = new File("amankush.txt"); 

      File dirs = new File(f.getParent()); 
      if (!dirs.exists()) 
       dirs.mkdirs(); 
      f.createNewFile(); 

      Log.d(WifiDirectActivity.TAG, "server: copying files " + f.toString()); 
      InputStream str = client.getInputStream(); 
      copyFile(str, new FileOutputStream(f)); 
      //DataInputStream inputstream =new DataInputStream(client.getInputStream()); 
      //String str = inputstream.readUTF(); 
      serverSocket.close(); 
      server_running = false; 
      return f.getAbsolutePath(); 
     } catch (IOException e) { 
      Log.e(WifiDirectActivity.TAG, e.getMessage()); 
      return null; 
     } 
    } 


    @Override 
    protected void onPostExecute(String result) { 
     if (result != null) { 
      statusText.setText("File copied - " + result); 
      Intent intent = new Intent(); 
      intent.setAction(Intent.ACTION_VIEW); 
      context.startActivity(intent); 
     } 

    } 

    @Override 
    protected void onPreExecute() { 
     statusText.setText("Opening a server socket"); 
    }

最后filetransferservice ：

public class FileTransferService extends IntentService 
{ 
private static final int SOCKET_TIMEOUT = 5000; 
public static final String ACTION_SEND_FILE = "com.example.android.wifidirect.SEND_FILE"; 
public static final String EXTRAS_FILE_PATH = "file_url"; 
public static final String EXTRAS_ADDRESS = "go_host"; 
public static final String EXTRAS_PORT = "go_port"; 

public FileTransferService(String name) { 
    super(name); 
} 

public FileTransferService() { 
    super("FileTransferService"); 
} 


@Override 
protected void onHandleIntent(Intent intent) { 

    Context context = getApplicationContext(); 
    if (intent.getAction().equals(ACTION_SEND_FILE)) { 
     String fileUri = intent.getExtras().getString(EXTRAS_FILE_PATH); 
     String host = intent.getExtras().getString(EXTRAS_ADDRESS); 
     Socket socket = new Socket(); 
     int port = intent.getExtras().getInt(EXTRAS_PORT); 

     try { 
      Log.d(WifiDirectActivity.TAG, "Opening client socket - "); 
      socket.bind(null); 
      socket.connect((new InetSocketAddress(host, port)), SOCKET_TIMEOUT); 
      if(socket.isBound() && socket.isConnected() && socket.isClosed()) 
       Log.d(WifiDirectActivity.TAG, "Socket not bound"); 
      Log.d(WifiDirectActivity.TAG, "Client socket - " + socket.isConnected()); 
      OutputStream os = socket.getOutputStream(); 
      ContentResolver cr = context.getContentResolver(); 
      InputStream stream = null; 
      try { 
       stream = cr.openInputStream(Uri.parse(fileUri)); 
       //stream = new DataOutputStream(socket.getOutputStream()); 
       //stream.writeUTF("a string"); 
      } catch (FileNotFoundException e) { 
       Log.d(WifiDirectActivity.TAG, e.toString()); 
      } 
      DeviceDetailFragment.copyFile(stream, os); 
      Log.d(WifiDirectActivity.TAG, "Client: Data written"); 
     } catch (IOException e) { 
      Log.e(WifiDirectActivity.TAG, e.getMessage()); 
     } finally { 
      if (socket != null) { 
       if (socket.isConnected()) { 
        try { 
         socket.close(); 
        } catch (IOException e) { 
         // Give up 
         e.printStackTrace(); 
        } 
       } 
      } 
     } 
    }

谁能告诉我为什么发生这种情况？

来源

2016-08-02 Aman Kush

我有同样的问题...

看看这个：

String localIP = Utils.getLocalIPAddress();

转到Utils类，它总是返回null。更改要返回的值。

希望这对你有所帮助。

来源

2017-08-14 06:46:33 jas

Android的WIFI直接

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