An app might need to keep track of, or be notified of, incoming and outgoing phone calls.
In order to intercept incoming and outgoing phone calls, we listen for broadcasts:
First, we require the permissions to intercept phone calls:
[assembly: UsesPermission( Manifest.Permission.ReadPhoneState)] [assembly: UsesPermission( Manifest.Permission.ProcessOutgoingCalls)]
Next, we need to create a broadcast receiver that can handle phone state changes and call events:
[BroadcastReceiver] [IntentFilter(new[] { TelephonyManager.ActionPhoneStateChanged, Intent.ActionNewOutgoingCall })] public class PhoneCallReceiver : BroadcastReceiver { public override void OnReceive( Context context, Intent intent) { } }Now, in order to intercept incoming calls, we listen for phone state changes:
if (intent.Action == TelephonyManager.ActionPhoneStateChanged) { var number = intent.GetStringExtra( TelephonyManager.ExtraIncomingNumber); if (!string.IsNullOrEmpty...