Hi Geeks,
I have a requirement where I need to work in the following scenario.
When any user gets a call, identify the number, and launch my app in the background and insert a record in some table.
I searched through different forums and found BroadcastReceiver is the one by which I can get the incoming number.
However, I tried to implement this, but no success.
[BroadcastReceiver(Enabled =true)]
[IntentFilter(new[] { "com.App.CALLER_RECEIVER" })]
public class IncomingCallReader : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
switch (intent.Action)
{
case Intent.ActionNewOutgoingCall:
Globals.ContactNumber = intent.GetStringExtra(Intent.ExtraPhoneNumber);
var outboundPhoneNumber = intent.GetStringExtra(Intent.ExtraPhoneNumber);
Toast.MakeText(context, $"Started: Outgoing Call to {outboundPhoneNumber}", ToastLength.Long).Show();
break;
case TelephonyManager.ActionPhoneStateChanged:
var state = intent.GetStringExtra(TelephonyManager.ExtraState);
if (state == TelephonyManager.ExtraStateIdle)
Toast.MakeText(context, "Phone Idle (call ended)", ToastLength.Long).Show();
else if (state == TelephonyManager.ExtraStateOffhook)
Toast.MakeText(context, "Phone Off Hook", ToastLength.Long).Show();
else if (state == TelephonyManager.ExtraStateRinging)
Toast.MakeText(context, "Phone Ringing", ToastLength.Long).Show();
else if (state == TelephonyManager.ExtraIncomingNumber)
{
var incomingPhoneNumber = intent.GetStringExtra(TelephonyManager.ExtraIncomingNumber);
Toast.MakeText(context, $"Incoming Number: {incomingPhoneNumber}", ToastLength.Long).Show();
}
break;
default:
break;
}
}
protected override void OnCreate(Bundle savedInstanceState)
{
TabLayoutResource = Resource.Layout.Tabbar;
ToolbarResource = Resource.Layout.Toolbar;
base.OnCreate(savedInstanceState);
Xam.Essentials.Platform.Init(this, savedInstanceState);
global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
RegisterReceiver(new IncomingCallReader(), new IntentFilter("com.uniconta.mobile_new.app"));
LoadApplication(new App());
}
Second Approach:
public interface ICallReceiver
{
void OnReceive();
}
public class IncomingCallReceiver: ICallReceiver
{
public void OnReceive()
{
Intent intent = new Intent("com.uniconta.CALLER_RECEIVER");
var incomingPhoneNumber = intent.GetStringExtra(TelephonyManager.ExtraIncomingNumber);
Globals.ContactNumber = incomingPhoneNumber;
Forms.Context.SendBroadcast(intent);
}
}
DependencyService.Get().OnReceive();
I want this method to be called whenever the user gets a call.
1st question - Is it possible to get the incoming call number in Xamarin forms?
2nd Question - is it possible to launch an app in the background when someone gets a call and app can do things in the background?
Thanks
Anand
\a\1\s\Xamarin.Forms.Platform.iOS\VisualElementTracker.cs:413 
