Intercept outgoing call in Blackberry - blackberry

Question

we are looking for a way to do the following:
user with BB enters a number (or selects a contact and clicks 'send')
our app in the background detects the call event
our app does something (e.g. blocks the call / makes a call to a different number, etc)
can this be done at all? can it be done transparently to the user (i.e. no dialogs or user involvement)?
which APIs should I look at?
Thanks

Answer 1

Outgoing call interception
call interception http://img200.imageshack.us/img200/6927/callinit.png
create extention of Application for background service
implement PhoneListener
use callInitiated
should be signed before use on device
should be tested against known issue
Code example:
import net.rim.blackberry.api.phone.Phone;
import net.rim.blackberry.api.phone.PhoneListener;
import net.rim.device.api.system.Application;
import net.rim.device.api.ui.component.Dialog;
public class CatchCall extends Application implements PhoneListener {
public CatchCall() {
Phone.addPhoneListener(this);
}
public static void main(String[] args) {
new CatchCall().enterEventDispatcher();
}
public void callAdded(int callId) {
}
public void callAnswered(int callId) {
}
public void callConferenceCallEstablished(int callId) {
}
public void callConnected(int callId) {
}
public void callDirectConnectConnected(int callId) {
}
public void callDirectConnectDisconnected(int callId) {
}
public void callDisconnected(int callId) {
}
public void callEndedByUser(int callId) {
}
public void callFailed(int callId, int reason) {
}
public void callHeld(int callId) {
}
public void callIncoming(int callId) {
}
public void callInitiated(int callid) {
Dialog.inform("call initiated");
}
public void callRemoved(int callId) {
}
public void callResumed(int callId) {
}
public void callWaiting(int callid) {
}
public void conferenceCallDisconnected(int callId) {
}
}
Cancel call
You can use event injection to fire Close button press event:
public void dropCall()
{
KeyEvent inject = new KeyEvent(KeyEvent.KEY_DOWN, Characters.ESCAPE, 0);
inject.post();
}
Don't forget to set permissions for device release: Options => Advanced Options => Applications => [Your Application] =>Edit Default permissions =>Interactions =>key stroke Injection
See also
BlackBerry - Simulate a KeyPress event