Detect if an outgoing call has been answered

Question

Once ACTION_NEW_OUTGOING_CALL has been broadcasted, I need to capture the following event of the other party answer. Could you advice on how to achieve that please? I know it is possible as the android dialer app changes the green android icon to the person's photo excatly when they pick up. Thanks!

UPDATED: I've had a look at the source of the app on Android handling the outgoing calls. I noticed the following method in ContactsUtils:

/**
 * Kick off an intent to initiate a call.
 */
public static void initiateCall(Context context, CharSequence phoneNumber) {
    Intent intent = new Intent(Intent.ACTION_CALL_PRIVILEGED,
            Uri.fromParts("tel", phoneNumber.toString(), null));
    context.startActivity(intent);
}

I guess my answer is in the activity listening for Intent.ACTION_CALL_PRIVILEGED. So to reprhase my question: Does anyone know which activity handles Intent.ACTION_CALL_PRIVILEGED? Thank you.

Answer 1

It does not necessarily needs to be possible to capture this as an outside app. The green android icon is a part of the application that controls the call, so it does not need a broadcast to change the icon.