只是一个简单的例子，它看起来像：
public class IPControl extends Activity { private ProgressDialog pd = null; private String data = null; private Socket socket; private String serverIpAddress; private static final int REDIRECTED_SERVERPORT = 32; public PrintWriter out; public BufferedReader in ; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); try{ this.pd = ProgressDialog.show(this, "Loading..", "Please Wait...", true, false); new AsyncAction().execute(); }catch (Exception e) { e.printStackTrace(); } } private class AsyncAction extends AsyncTask<String, Void, String> { protected Void doInBackground(String... args) { try { InetAddress serverAddr = InetAddress.getByName(serverIpAddress); socket = new Socket(serverAddr, REDIRECTED_SERVERPORT); } catch (UnknownHostException e1) { e1.printStackTrace(); } catch (IOException e1) { e1.printStackTrace(); } try { out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())), true); in = new BufferedReader(new InputStreamReader(socket.getInputStream())); while (! in.ready()); readBuffer(); out.println("rootrn"); //System.out.print("rootrn"); while (! in .ready()); readBuffer(); out.println("rootrn"); //System.out.print("rootrn"); while (! in .ready()); String msg = ""; while (in.ready()) { msg = msg + (char) in .read(); } } catch (IOException e) {} return null;//returns what you want to pass to the onPostExecute() } protected void onPostExecute(String result) { //resultis the data returned from doInbackground IPControl.this.data = result; if (IPControl.this.pd != null) { IPControl.this.pd.dismiss(); } } }
