android - Starting a new activity after info is received in other thread -

Here is a part of my code: After clicking the button, the connection to the new thread and server has started. If the connection is successful, then the app should start a new activity and end the current. Can anyone explain what is the best way to do this?

  transThread.submit (new runnab () {public void run () {guiProgressDialog (true); if (user.length () & lt; 4) GUINotifyUser (" Must be at least 4 characters! "); And if (pass.length () & lt; 4) GUINotifyUser (" The password must have at least 4 characters! ") Else if (! Pass.equals GUINotifyUser (" Your Email Do not have a valid email address! "); Else if (fname.equals (" ") || lname.equals (" ")) guiNotifyUser (" All fields are mandatory! "); {Try {end string message = Autodiscovery Htp on strike signup (user, md5 (pass), mail, fnn, la A); guiNotifyUser (message); // If the message is equal then new activity starts} catch (exception e) {e.printStackTrace ();}} guiProgressDialog (wrong);}} break;; / Code>   
 
 
 You can use it to show how to do it.  
 I personally want to use  asyncTask  for this. You can do your work in  doInBackground () , then post it to  Start on  on  and  activity  or You should also  UI   
  
  AsyncTask   
  Edit the code in the comment   
 I can not say that you are doing without any kind of logic, but the first problem is that when you Start  asyncTask  in  context  You do not want to use  getApplicationContext ()  especially the way you are not I think that Paco is getting a  NPE  because  reference  has not been started yet, if you are passing  context  in constructor, you can do this However, it seems that your  asyncTask  is an internal class  register activity    / Code> which means that it has access to all the member variables of  register activity  and its  context . This means that you can use  context  instead of  RegisterActivity.This  to start your  activity .  
  @Override protected void onPostExecute (string result) {super.onPostExecute (results); // if (result == "successful registration!") // string i; // I = "da"; Context.startActivity (new intent (register activity. This, login activity class)); // Change it here   
 As stated, your constructor is not required for  context  if its internal class but if it was a separate file then This  
  class register is asyncTask and lt; String, zero, string & gt; {Reference reference; Personal RegisterTags (Reference Reference) {this.context = context; Use the variable (reference) given in the constructor above / /