intercept sms

intercept_sms.java

public class SMSBackgroundService extends BroadcastReceiver {
    
    public event EventHandler<String> OnCodeReceived;
    
    public override void OnReceive(Context context, Android.Content.Intent intent) {
        if ((intent.Action != "android.provider.Telephony.SMS_RECEIVED")) {
            return;
        }
        
        SmsMessage[] smsMessages;
        if ((((int)(Android.OS.Build.VERSION.SdkInt)) >= 19)) {
            // KITKAT         
            smsMessages = Telephony.Sms.Intents.GetMessagesFromIntent(intent);
        }
        else {
            var bundle = intent.Extras;
            Java.Lang.Object[] pdus = ((Java.Lang.Object[])(bundle.Get("pdus")));
            smsMessages = new SmsMessage[pdus.Length];
            for (var i = 0; (i < smsMessages.Length); i++) {
                smsMessages[i] = SmsMessage.CreateFromPdu(((byte[])(pdus[i])));
            }
            
        }
        
        for (var i = 0; (i < smsMessages.Length); i++) {
            var sms = smsMessages[i];
            var body = sms.MessageBody;
            body = body.Trim();
            var matche = Regex.Match(body, "");
            if (matche.Success) {
                var group = matche.Groups["codigo"];
                var code = group.Value;
                OnCodeReceived?.Invoke(sms, code);
            }
            
        }
        
    }
}