Bdtjtk

Here is my code

FloatingCircle is the service started by MainActivity.class

I want to call method Visibility() when i click on Dismiss button in notification

     public class FloatingCircle extends Service {



        public void onCreate () {

                super.onCreate();

                initializeView();

                getScreenSize();

                showFloat();





                NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);





                String channelId = "channel-id";

                String channelName = "Channel Name";

                int importance = NotificationManager.IMPORTANCE_HIGH;



                if (android.os.Build.VERSION.SDK_INT >= 26) {

                    NotificationChannel mChannel = new NotificationChannel(

                            channelId, channelName, importance);

                    notificationManager.createNotificationChannel(mChannel);

                }



           Intent intent = new Intent(getApplicationContext(), FloatingCircle.class **// What should be here could you suggest me**);

                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);

                PendingIntent pIntent = PendingIntent.getService(this, 0, intent, 0);





                NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context, channelId)

                        .setSmallIcon(R.mipmap.ic_launcher)//R.mipmap.ic_launcher

                        .setContentTitle("Bubble Life")

                        .setContentText("Touch to On/Off")

                        .addAction(R.drawable.ic_action_name,

                                "Dismiss", pIntent)// Here Dismiss is Button shown in notification

                        .setDefaults(NotificationCompat.DEFAULT_ALL);



                notificationManager.notify(0, mBuilder.build());

        }

        }



This method must be invoked when Dismiss Button is clicked



            public void Visibility(()

            {

                //some code here

                windowManager.removeViewImmediate(smallCircle);

                Log.d("lol","Done Killing");

            }



 public void killbubble()

    {



        Visibility();

        selfstop();



    }

I have tried one thing that i have created another service and invoked Floatingclass method....

public class MethodCaller extends Service {



    FloatingCircle floatingCircle=new FloatingCircle();



    @Override

    public void onCreate() {

        super.onCreate();

        Log.d("lol","yeah");



        //Toast.makeText(getApplicationContext(),"lol",Toast.LENGTH_LONG).show();

    }



    @Nullable

    @Override

    public IBinder onBind(Intent intent) {



        return null;

    }





    @Override

    public int onStartCommand(Intent intent, int flags, int startId) {





        floatingCircle.killbubble();

        stopSelf();

        return flags;

    }



}

I have succeed in it but this is giving me an error......

Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'void android.view.WindowManager.removeViewImmediate(android.view.View)' on a null object reference

        at com.anam.floatimage.model.FloatingCircle.Visibility(FloatingCircle.java:547)

        at com.anam.floatimage.model.FloatingCircle.killbubble(FloatingCircle.java:777)

        at com.anam.floatimage.MethodCaller.onStartCommand(MethodCaller.java:36)