Err, is this line in your manifest file?
<uses-permission android:name="android.permission.INTERNET" />
just asking....
On Nov 11, 9:06 am, Lei <[EMAIL PROTECTED]> wrote:
> Hi all
>
> I want to program a server on android phone. I use socket.
> Is the android emulator's IP address the same to the PC's?
> I got exceptions from the client which I program on the same PC.
>
> the exceptions is:
> java.net.ConnectException: Connection refused: connect
> java.lang.NullPointerException
>
> the code is below:
>
> java client:
> import java.io.DataInputStream;
> import java.io.DataOutputStream;
> import java.io.IOException;
> import java.net.InetAddress;
> import java.net.Socket;
> import java.net.UnknownHostException;
>
> public class JavaClient {
>
> public static void main(String argv[])
> {
> Socket ClientSocket = null;
>
> DataOutputStream os= null;
> DataInputStream is = null;
>
> try {
> // Retrieve the ServerName
> InetAddress serverAddr = InetAddress.getByName(SERVERIP);
>
> /* Create new UDP-Socket */
> ClientSocket = new Socket(serverAddr,SERVERPORT);
>
> os= new DataOutputStream(ClientSocket.getOutputStream());
> is = new DataInputStream(ClientSocket.getInputStream());
> } catch (UnknownHostException e) {
> System.err.println("Don't know about host: hostname");
> } catch (IOException e) {
> System.err.println(e);
> }
>
> try {
>
> os.writeBytes("hello");
>
> byte[] input = new byte[100];
> while(is.read(input, 0, 10)!=-1)
> {
> System.out.println(new String(input));
> }
>
> os.close();
> is.close();
> ClientSocket.close();
>
> } catch (Exception e) {
> System.out.println(e);
>
> }
> }
>
> public static final String SERVERIP = "142.19.128.114"; //
> 'Within' the emulator!
> public static final int SERVERPORT = 4444;
>
> }
>
> android server:
> public class AndroidServer extends Activity {
> /** Called when the activity is first created. */
> @Override
> public void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> setContentView(R.layout.main);
>
> DataOutputStream os=null;
> DataInputStream is = null;
> ServerSocket socket = null;
> Socket ClientSocket = null;
>
> try {
> /* Create new UDP-Socket */
> socket = new ServerSocket(SERVERPORT);
> ClientSocket = socket.accept();
>
> os = new DataOutputStream(ClientSocket.getOutputStream());
> is = new DataInputStream(ClientSocket.getInputStream());
>
> /* By magic we know, how much data will be waiting for us
> */
> byte[] buf = new byte[100];
>
> while(is.read(buf, 0, 10)!=0)
> {
> Log.d("TCP", new String(buf));
> os.writeBytes("end");
>
> }
>
> os.close();
> is.close();
> socket.close();
> ClientSocket.close();
>
> } catch (Exception e) {
> System.out.println(e);
> }
> }
>
> public static final int SERVERPORT = 4444;
>
> }
>
> Regards,
> Lei
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