如何在android软件登陆，获取用户名和手机ID，通过POST传递服务器，并获得返回信息?

private void login ( final String username , final String password ) { 
if (! netMgr . isNetworkAvailable ()) { 
Toast . makeText ( this , "请检查网络连接！" , Toast . LENGTH_LONG ). show (); 
return ; 
} 
loginProgress = new ProgressDialog ( this ); 
loginProgress . setCancelable ( false ); 
loginProgress . setCanceledOnTouchOutside ( false ); 
loginProgress = loginProgress . show ( this , null , "登陆中..." ); 
new Thread ( new Runnable () { 
@Override 
public void run () { 
Log . d ( "yanghongbing" , "start network!" ); 
HttpClient client = new DefaultHttpClient (); 
HttpPost httpPost = new HttpPost ( Config . LOGIN_URL ); 
List < NameValuePair > params = new ArrayList < NameValuePair >(); 
params . add ( new BasicNameValuePair ( "username" , username )); 
params . add ( new BasicNameValuePair ( "password" , password )); 

HttpResponse httpResponse = null ; 
try { 
httpPost . setEntity ( new UrlEncodedFormEntity ( params , HTTP . UTF_8 )); 
httpResponse = client . execute ( httpPost ); 
if ( httpResponse . getStatusLine (). getStatusCode () == 200 ) { 
Log . d ( "yanghongbing" , "network OK!" ); 
HttpEntity entity = httpResponse . getEntity (); 
String entityString = EntityUtils . toString ( entity ); 
String jsonString = entityString . substring ( entityString . indexOf ( "{" )); 
Log . d ( "yanghongbing" , "entity = " + jsonString ); 
JSONObject json = new JSONObject ( jsonString ); 
sendMessage ( MSG_LOGIN_RESULT , json ); 
Log . d ( "yanghongbing" , "json = " + json ); 
} 
} catch ( UnsupportedEncodingException e ) { 
Log . d ( "yanghongbing" , "UnsupportedEncodingException" ); 
e . printStackTrace (); 
} catch ( ClientProtocolException e ) { 
Log . d ( "yanghongbing" , "ClientProtocolException" ); 
e . printStackTrace (); 
} catch ( IOException e ) { 
Log . d ( "yanghongbing" , "IOException" ); 
sendMessage ( MSG_SERVER_UNAVAILABLE , null ); 
e . printStackTrace (); 
} catch ( JSONException e ) { 
Log . d ( "yanghongbing" , "IOException" ); 
// TODO Auto-generated catch block 
e . printStackTrace (); 
} 
} 
}). start (); 

}