Android SipManager拋出NullPointException

Question

我想實現我自己的android sip實現，並且遇到註冊到我的SIP服務器的問題。特別是，SipManager.register（）函數拋出一個NullPointerException。有沒有人經歷過這個？在下面的函數中沒有任何內容是空的，所以我不明白這是從哪裏來的。謝謝

public boolean initializeProfile() { 
    final Globals global = Globals.getInstance(); 
    if (sipProfile != null) 
     closeLocalProfile(); 

    String username = "omitted"; 
    String password = "omitted"; 
    String server = "omitted"; 

    try { 
     global.Log("Trying to build the profile"); 
     SipProfile.Builder builder = new SipProfile.Builder(username, 
       server); 
     builder.setPassword(password); 
     sipProfile = builder.build(); 


     builder.setAutoRegistration(true); 

     sipManager.open(sipProfile); 

     SipRegistrationListener listener = new SipRegistrationListener() { 

      public void onRegistering(String localProfileUri) { 
       global.Log("Sip Listener- Attempting to Register"); 
      } 

      public void onRegistrationDone(String localProfileUri, 
        long expiryTime) { 
       global.Log("Sip Listener- Registration Success!"); 
      } 

      public void onRegistrationFailed(String localProfileUri, 
        int errorCode, String errorMessage) { 
       global.Log("Sip Listener- Registration Failed"); 
      } 
     }; 

     sipManager.setRegistrationListener(sipProfile.getUriString(), listener); 

     //THIS IS WHERE THE EXCEPTION IS BEING THROWN 
     sipManager.register(sipProfile, 3000, listener); 

     if (sipManager.isRegistered(sipProfile.getUriString())) 
     { 
      global.Log("SipManager is ready for calls"); 
      return true; 
     } 
     else 
      return false; 

    } catch (Exception ex) { 

      global.Log("---Error-- initializeProfile: " + ex.getMessage()); 
      return false; 

    } 

} 

Answer 1

解決了我自己的問題。似乎在線程中運行時這不起作用。