DEBUG / SntpClient（60）：请求时失败：产生java.net.SocketException：地址族不支持的协议 [英] DEBUG/SntpClient(60): request time failed: java.net.SocketException: Address family not supported by protocol

问题描述

我米运行的服务器上的Linux控制台其C语言编写，在Android中创建客户端。我还没有得到关于DDMS任何错误，但下面的调试信息来

  11-12 20：38：06.787：DEBUG / SntpClient（60）：请求时失败：
java.net.SocketException异常：地​​址族不支持的协议
 

但消息不会去到服务器。但是，如果在C或Java中创建客户端是工作的罚款。 任何建议。

 公共类UDPDemo延伸活动{
    私人的EditText mEditText;
    私人按钮sendButton;
    私人DatagramSocket的client_socket;
    私有静态的InetAddress ip地址;
    私人字节[] SEND_DATA =新的字节[1024];
    静态{
    尝试 {
     ip地址= InetAddress.getByName（127.0.0.1）;
 }赶上（UnknownHostException异常E1）{
 e1.printStackTrace（）;
 }
}

/ **第一次创建活动时调用。 * /
@覆盖
公共无效的onCreate（包savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.main）;
    mEditText =（EditText上）findViewById（R.id.EditText01）;
    sendButton =（按钮）findViewById（R.id.Button01）;
    sendButton.setOnTouchListener（发送）;
 }
OnTouchListener发送=新OnTouchListener（）{
  @覆盖
  公共布尔onTouch（视图V，MotionEvent事件）{
  如果（event.getAction（）== MotionEvent.ACTION_UP）
  尝试 {
      client_socket =新的DatagramSocket（）;
      字符串数据= mEditText.getText（）的toString（）。
      SEND_DATA = data.getBytes（）;

      DatagramPacket类Sent_Packet的=新的DatagramPacket（SEND_DATA，
               send_data.length，ip地址，5000）;

client_socket.send（Sent_Packet的）;
mEditText.setText（）;
  }赶上（IOException异常E）{
    的System.out.println（UDPDemo.enclosing_method（）错误+ e.getMessage（））;
   e.printStackTrace（）;
  }
 返回true;
 }
};
}
 

解决方案

SNTP是网络时间协议。仿真器试图获取的实际时间。我想，这无关你的应用程序。

从：<一href="http://developer.appcelerator.com/question/117495/javanetsocketexception-address-family-not-supported-by-protocol" rel="nofollow">http://developer.appcelerator.com/question/117495/javanetsocketexception-address-family-not-supported-by-protocol

I m running server on Linux console which written in C and creating client in android. i have not getting any error on DDMS but following Debug message come

11-12 20:38:06.787: DEBUG/SntpClient(60): request time failed: 
java.net.SocketException: Address family not supported by protocol

but message will not go to the server. But if create client in C or java it working fine. any suggestion.

public class UDPDemo extends Activity {
    private EditText mEditText;
    private Button sendButton;
    private DatagramSocket client_socket;
    private static InetAddress IPAddress;
    private byte[] send_data = new byte[1024];
    static{
    try {
     IPAddress =  InetAddress.getByName("127.0.0.1");
 } catch (UnknownHostException e1) {
 e1.printStackTrace();
 }
} 

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    mEditText = (EditText)findViewById(R.id.EditText01);
    sendButton = (Button)findViewById(R.id.Button01);
    sendButton.setOnTouchListener( send);
 }
OnTouchListener send = new OnTouchListener() {
  @Override
  public boolean onTouch(View v, MotionEvent event) {
  if( event.getAction() == MotionEvent.ACTION_UP)
  try {  
      client_socket = new DatagramSocket();
      String data =  mEditText.getText().toString();
      send_data = data.getBytes();

      DatagramPacket send_packet = new DatagramPacket(send_data,
               send_data.length, IPAddress, 5000); 

client_socket.send(send_packet);
mEditText.setText("");
  }catch (IOException e) {
    System.out.println("UDPDemo.enclosing_method() error"+e.getMessage());
   e.printStackTrace();
  }
 return true;
 }
};
}

解决方案

SNTP is the Network Time Protocol. The emulator tries to fetch the actual time. I think, this has nothing to do with your app.

From: http://developer.appcelerator.com/question/117495/javanetsocketexception-address-family-not-supported-by-protocol

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