val sipManager: SipManager? by lazy(LazyThreadSafetyMode.NONE) {
    SipManager.newInstance(this)
}

public SipManager sipManager = null;
...
if (sipManager == null) {
    sipManager = SipManager.newInstance(this);
}

private var sipProfile: SipProfile? = null
...

val builder = SipProfile.Builder(username, domain)
        .setPassword(password)
sipProfile = builder.build()

public SipProfile sipProfile = null;
...

SipProfile.Builder builder = new SipProfile.Builder(username, domain);
builder.setPassword(password);
sipProfile = builder.build();

val intent = Intent("android.SipDemo.INCOMING_CALL")
val pendingIntent: PendingIntent = PendingIntent.getBroadcast(this, 0, intent, Intent.FILL_IN_DATA)
sipManager?.open(sipProfile, pendingIntent, null)

Intent intent = new Intent();
intent.setAction("android.SipDemo.INCOMING_CALL");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, Intent.FILL_IN_DATA);
sipManager.open(sipProfile, pendingIntent, null);

sipManager?.setRegistrationListener(sipProfile?.uriString, object : SipRegistrationListener {

    override fun onRegistering(localProfileUri: String) {
        updateStatus("Registering with SIP Server...")
    }

    override fun onRegistrationDone(localProfileUri: String, expiryTime: Long) {
        updateStatus("Ready")
    }

    override fun onRegistrationFailed(
            localProfileUri: String,
            errorCode: Int,
            errorMessage: String
    ) {
        updateStatus("Registration failed. Please check settings.")
    }
})

sipManager.setRegistrationListener(sipProfile.getUriString(), new SipRegistrationListener() {

    public void onRegistering(String localProfileUri) {
        updateStatus("Registering with SIP Server...");
    }

    public void onRegistrationDone(String localProfileUri, long expiryTime) {
        updateStatus("Ready");
    }

    public void onRegistrationFailed(String localProfileUri, int errorCode,
        String errorMessage) {
        updateStatus("Registration failed.  Please check settings.");
    }
}

fun closeLocalProfile() {
    try {
        sipManager?.close(sipProfile?.uriString)
    } catch (ee: Exception) {
        Log.d("WalkieTalkieActivity/onDestroy", "Failed to close local profile.", ee)
    }
}

public void closeLocalProfile() {
    if (sipManager == null) {
       return;
    }
    try {
       if (sipProfile != null) {
          sipManager.close(sipProfile.getUriString());
       }
     } catch (Exception ee) {
       Log.d("WalkieTalkieActivity/onDestroy", "Failed to close local profile.", ee);
     }
}

var listener: SipAudioCall.Listener = object : SipAudioCall.Listener() {

    override fun onCallEstablished(call: SipAudioCall) {
        call.apply {
            startAudio()
            setSpeakerMode(true)
            toggleMute()
        }
    }

    override fun onCallEnded(call: SipAudioCall) {
        // Do something.
    }
}

SipAudioCall.Listener listener = new SipAudioCall.Listener() {

   @Override
   public void onCallEstablished(SipAudioCall call) {
      call.startAudio();
      call.setSpeakerMode(true);
      call.toggleMute();
         ...
   }

   @Override

   public void onCallEnded(SipAudioCall call) {
      // Do something.
   }
};

val call: SipAudioCall? = sipManager?.makeAudioCall(
        sipProfile?.uriString,
        sipAddress,
        listener,
        30
)

call = sipManager.makeAudioCall(sipProfile.getUriString(), sipAddress, listener, 30);

/**
 * Listens for incoming SIP calls, intercepts and hands them off to WalkieTalkieActivity.
 */
class IncomingCallReceiver : BroadcastReceiver() {

    /**
     * Processes the incoming call, answers it, and hands it over to the
     * WalkieTalkieActivity.
     * @param context The context under which the receiver is running.
     * @param intent The intent being received.
     */
    override fun onReceive(context: Context, intent: Intent) {
        val wtActivity = context as WalkieTalkieActivity

        var incomingCall: SipAudioCall? = null
        try {
            incomingCall = wtActivity.sipManager?.takeAudioCall(intent, listener)
            incomingCall?.apply {
                answerCall(30)
                startAudio()
                setSpeakerMode(true)
                if (isMuted) {
                    toggleMute()
                }
                wtActivity.call = this
                wtActivity.updateStatus(this)
            }
        } catch (e: Exception) {
            incomingCall?.close()
        }
    }

    private val listener = object : SipAudioCall.Listener() {

        override fun onRinging(call: SipAudioCall, caller: SipProfile) {
            try {
                call.answerCall(30)
            } catch (e: Exception) {
                e.printStackTrace()
            }
        }
    }
}

/**
 * Listens for incoming SIP calls, intercepts and hands them off to WalkieTalkieActivity.
 */
public class IncomingCallReceiver extends BroadcastReceiver {
    /**
     * Processes the incoming call, answers it, and hands it over to the
     * WalkieTalkieActivity.
     * @param context The context under which the receiver is running.
     * @param intent The intent being received.
     */
    @Override
    public void onReceive(Context context, Intent intent) {
        SipAudioCall incomingCall = null;
        try {
            SipAudioCall.Listener listener = new SipAudioCall.Listener() {
                @Override
                public void onRinging(SipAudioCall call, SipProfile caller) {
                    try {
                        call.answerCall(30);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            };
            WalkieTalkieActivity wtActivity = (WalkieTalkieActivity) context;
            incomingCall = wtActivity.sipManager.takeAudioCall(intent, listener);
            incomingCall.answerCall(30);
            incomingCall.startAudio();
            incomingCall.setSpeakerMode(true);
            if(incomingCall.isMuted()) {
                incomingCall.toggleMute();
            }
            wtActivity.call = incomingCall;
            wtActivity.updateStatus(incomingCall);
        } catch (Exception e) {
            if (incomingCall != null) {
                incomingCall.close();
            }
        }
    }
}

val sipManager: SipManager? by lazy(LazyThreadSafetyMode.NONE) {
    SipManager.newInstance(this)
}

var sipProfile: SipProfile? = null
...

val intent = Intent("android.SipDemo.INCOMING_CALL")
val pendingIntent: PendingIntent = PendingIntent.getBroadcast(this, 0, intent, Intent.FILL_IN_DATA)
sipManager?.open (sipProfile, pendingIntent, null)

public SipManager sipManager = null;
public SipProfile sipProfile = null;
...

Intent intent = new Intent();
intent.setAction("android.SipDemo.INCOMING_CALL");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, Intent.FILL_IN_DATA);
sipManager.open(sipProfile, pendingIntent, null);

class WalkieTalkieActivity : Activity(), View.OnTouchListener {
    ...
    lateinit var callReceiver: IncomingCallReceiver
    ...

    override fun onCreate(savedInstanceState: Bundle) {
        val filter = IntentFilter().apply {
            addAction("android.SipDemo.INCOMING_CALL")
        }
        callReceiver = IncomingCallReceiver()
        this.registerReceiver(callReceiver, filter)
        ...
    }
    ...
}

public class WalkieTalkieActivity extends Activity implements View.OnTouchListener {
...
    public IncomingCallReceiver callReceiver;
    ...

    @Override
    public void onCreate(Bundle savedInstanceState) {

       IntentFilter filter = new IntentFilter();
       filter.addAction("android.SipDemo.INCOMING_CALL");
       callReceiver = new IncomingCallReceiver();
       this.registerReceiver(callReceiver, filter);
       ...
    }
    ...
}