Code : Implement the PhoneListener interface

BlackBerry application programming interface (API) 4.0 introduced the ability to listen to the status of incoming and outgoing phone calls. To do so, an application must implement the PhoneListener (net.rim.blackberry.api.phone.PhoneListener) or AbstractPhoneListener class (net.rim.blackberry.api.phone.AbstractPhoneListener). The following code sample illustrates the implementation of the PhoneListener interface:

import net.rim.blackberry.api.phone.*;
import net.rim.device.api.ui.container.FlowFieldManager;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.component.Status;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.system.*;
public final class PhoneCallListenerSample extends Application
implements PhoneListener
{
static public void main(String[] args)
{
PhoneCallListenerSample plSample = new PhoneCallListenerSample();
plSample.enterEventDispatcher();
}
private PhoneCallListenerSample()
{
System.out.println("###PhoneCallListenerSample:
Registering listener...");
Phone.addPhoneListener(this);
System.out.println("###PhoneCallListenerSample:
Listener registered.");
}
private void showPhoneEvent(String reason, int callId)
{
Status.show("Phone event: " + reason + "\n" + "CallID: " + callId,
Bitmap.getPredefinedBitmap(Bitmap.EXCLAMATION), 4000,
Status.GLOBAL_STATUS, true, false, 2);
System.out.println("###PhoneCallListenerSample: Phone event: " +
reason + " for callID: " + callId);
}
// A call has been added to a conference call
public void callAdded(int callId)
{
showPhoneEvent("Call Added", callId);
}
// User answered a call
public void callAnswered(int callId)
{
showPhoneEvent("Call Answered", callId);
}
// Conference call established
public void callConferenceCallEstablished(int callId)
{
showPhoneEvent("Conference Call Established", callId);
}
// Network indicates a connected event
public void callConnected(int callId)
{
showPhoneEvent("Call Connected", callId);
}
// Direct-connect call connected
public void callDirectConnectConnected(int callId)
{
showPhoneEvent("DirectConnect Connected", callId);
}
// Direct-connect call disconnected
public void callDirectConnectDisconnected(int callId)
{
showPhoneEvent("DirectConnect Disconnected", callId);
}
// Call disconnected
public void callDisconnected(int callId)
{
showPhoneEvent("Call Disconnected", callId);
}
// User ended call
public void callEndedByUser(int callId)
{
showPhoneEvent("Call Ended By User", callId);
}
// Call has been placed on "hold"
public void callHeld(int callId)
{
showPhoneEvent("Call Held", callId);
}
// New call has arrived
public void callIncoming(int callId)
{
showPhoneEvent("Call Incoming", callId);
}
// Outbound call initiated by the handheld
public void callInitiated(int callid)
{
showPhoneEvent("Call Initiated", callid);
}
// Call removed from a conference call
public void callRemoved(int callId)
{
showPhoneEvent("Call Removed", callId);
}
// Call taken off of "hold"
public void callResumed(int callId)
{
showPhoneEvent("Call Resumed", callId);
}
// Call is waiting
public void callWaiting(int callid)
{
showPhoneEvent("Call Waiting", callid);
}
// Conference call has been terminated
// (all members disconnected)
public void conferenceCallDisconnected(int callId)
{
showPhoneEvent("Conference Call Disconnected", callId);
}
// Call failed
public void callFailed(int callId, int reason)
{
String errMsg = "Call Failed due to ";
// determine reason
switch( reason )
{
case PhoneListener.CALL_ERROR_AUTHORIZATION_FAILURE:
showPhoneEvent(errMsg + "Authorization Error", callId);
break;
case PhoneListener.CALL_ERROR_CALL_REPLACED_BY_STK:
showPhoneEvent(errMsg + "Call Replaced By Stack", callId);
break;
case PhoneListener.CALL_ERROR_CONGESTION:
showPhoneEvent(errMsg + "Congestion", callId);
break;
case PhoneListener.CALL_ERROR_CONNECTION_DENIED_BY_NETWORK:
showPhoneEvent(errMsg + "Connection Denied", callId);
break;
case PhoneListener.CALL_ERROR_DUE_TO_FADING:
showPhoneEvent(errMsg + "Fading", callId);
break;
case PhoneListener.CALL_ERROR_EMERGENCY_CALLS_ONLY:
showPhoneEvent(errMsg + "Emergency Calls Only", callId);
break;
case PhoneListener.CALL_ERROR_FDN_MISMATCH:
showPhoneEvent(errMsg + "FDN Mismatch", callId);
break;
case PhoneListener.CALL_ERROR_GENERAL:
showPhoneEvent(errMsg + "General Error", callId);
break;
case PhoneListener.CALL_ERROR_HOLD_ERROR:
showPhoneEvent(errMsg + "Hold Error", callId);
break;
case PhoneListener.CALL_ERROR_INCOMING_CALL_BARRED:
showPhoneEvent(errMsg + "Incoming Call Barred", callId);
break;
case PhoneListener.CALL_ERROR_LOST_DUE_TO_FADING:
showPhoneEvent(errMsg + "Lost Due To Fading", callId);
break;
case PhoneListener.CALL_ERROR_MAINTENANCE_REQUIRED:
showPhoneEvent(errMsg + "Maintenance", callId);
break;
case PhoneListener.CALL_ERROR_NUMBER_NOT_IN_SERVICE:
showPhoneEvent(errMsg + "Number Not In Service", callId);
break;
case PhoneListener.CALL_ERROR_NUMBER_UNOBTAINABLE:
showPhoneEvent(errMsg + "Number Unobtainable", callId);
break;
case PhoneListener.CALL_ERROR_OUTGOING_CALLS_BARRED:
showPhoneEvent(errMsg + "Outgoing Calls Barred", callId);
break;
case PhoneListener.CALL_ERROR_PLEASE_TRY_LATER:
showPhoneEvent(errMsg + "Try Later", callId);
break;
case PhoneListener.CALL_ERROR_RADIO_PATH_UNAVAILABLE:
showPhoneEvent(errMsg + "Radio Path Unavailable", callId);
break;
case PhoneListener.CALL_ERROR_SERVICE_CONFLICT:
showPhoneEvent(errMsg + "Service Conflict", callId);
break;
case PhoneListener.CALL_ERROR_SERVICE_NOT_AVAILABLE:
showPhoneEvent(errMsg + "Service Not Available", callId);
break;
case PhoneListener.CALL_ERROR_SUBSCRIBER_BUSY:
showPhoneEvent(errMsg + "Subscriber Busy", callId);
break;
case PhoneListener.CALL_ERROR_SYSTEM_BUSY_TRY_LATER:
showPhoneEvent(errMsg + "System Busy", callId);
break;
case PhoneListener.CALL_ERROR_TRY_AGAIN:
showPhoneEvent(errMsg + "Try Again", callId);
break;
case PhoneListener.CALL_ERROR_USER_BUSY_IN_DATA:
showPhoneEvent(errMsg + "User Busy In Data", callId);
break;
case PhoneListener.CALL_ERROR_USER_BUSY_IN_PRIVATE:
showPhoneEvent(errMsg + "User Busy In Private", callId);
break;
case PhoneListener.CALL_ERROR_USER_NOT_AUTHORIZED:
showPhoneEvent(errMsg + "Not Authorized", callId);
break;
case PhoneListener.CALL_ERROR_USER_NOT_AVAILABLE:
showPhoneEvent(errMsg + "User Not Available", callId);
break;
case PhoneListener.CALL_ERROR_USER_NOT_REACHABLE:
showPhoneEvent(errMsg + "User Not Reachable", callId);
break;
}
}