Оповещение при звонке

import android.content.Intent;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.widget.Toast;
 
public class MyPhoneStateListener extends PhoneStateListener {
    
      public void onCallStateChanged(int state,String incomingNumber){
      switch(state){
        case TelephonyManager.CALL_STATE_IDLE:    
          Log.d("DEBUG", "IDLE");
        break;
        case TelephonyManager.CALL_STATE_OFFHOOK:      
          Log.d("DEBUG", "OFFHOOK");
        break;
        case TelephonyManager.CALL_STATE_RINGING:  
          Log.d("DEBUG", "RINGING");
        break;
        }
      } 
    }

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
 
public class ServiceReceiver extends BroadcastReceiver {
      @Override
      public void onReceive(Context context, Intent intent) {
        MyPhoneStateListener phoneListener=new MyPhoneStateListener();
        TelephonyManager telephony = (TelephonyManager) 
        context.getSystemService(Context.TELEPHONY_SERVICE);
        telephony.listen(phoneListener,PhoneStateListener.LISTEN_CALL_STATE);
      }
    }

import java.util.concurrent.TimeUnit;
 
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.widget.Toast;
 
public class MyService extends Service {
    NotificationManager nm;
      
      final String LOG_TAG = "myLogs";
 
      public void onCreate() {
        super.onCreate();
        Log.d(LOG_TAG, "onCreate");
        nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        
      }
      
      public int onStartCommand(Intent intent, int flags, int startId) {
        sendNotif();
        return super.onStartCommand(intent, flags, startId);
      }
 
      public void onDestroy() {
        super.onDestroy();
      }
 
      public IBinder onBind(Intent intent) {
        return null;
      }
 
 
    
      
      @SuppressWarnings("deprecation")
    void sendNotif() {
            Notification notif = new Notification(R.drawable.ic_launcher, "Text", 
              System.currentTimeMillis());
            Intent intent = new Intent(this, MainActivity.class);
            PendingIntent pIntent = PendingIntent.getActivity(this, 0, intent, 0);
            notif.setLatestEventInfo(this, "Text", "Text", pIntent);
            notif.flags |= Notification.FLAG_AUTO_CANCEL;
            nm.notify(1, notif);
          }
 
    }

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.res.Resources;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
 
public class ServiceReceiver extends BroadcastReceiver {
    
    NotificationManager nm;
      
      
      @Override
      public void onReceive(Context context, Intent intent) {
        MyPhoneStateListener phoneListener=new MyPhoneStateListener();
        TelephonyManager telephony = (TelephonyManager) 
        context.getSystemService(Context.TELEPHONY_SERVICE);
        telephony.listen(phoneListener,PhoneStateListener.LISTEN_CALL_STATE);
      }
      
      
      public void ff(){
            Context context1 = getApplicationContext();
 
            Intent notificationIntent = new Intent(context1, ServiceReceiver.class);
            PendingIntent contentIntent = PendingIntent.getActivity(context1,
                    0, notificationIntent,
                    PendingIntent.FLAG_CANCEL_CURRENT);
 
            NotificationManager nm = (NotificationManager) context1 
                    .getSystemService(Context.NOTIFICATION_SERVICE);
            
            Resources res = context1.getResources();
            Notification.Builder builder = new Notification.Builder(context1);
 
            builder.setContentIntent(contentIntent)
                        .setSmallIcon(R.drawable.ic_launcher)
                        .setTicker("text")
                        .setWhen(System.currentTimeMillis())
                        .setAutoCancel(true)
                        .setContentTitle("text")
                        .setContentText("text");
            
            Notification n = builder.getNotification();
 
            nm.notify(101, n);
        }
      }