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I'm using Google API to get the location of a device and I have to use OnSuccessListener but I tried to use a PrintStream so it sends the location when its successful but it gives me a NetworkOnMainThreadException

I tried using handlers and I saw that i can use an AsyncTask but i dont know where, I really think the problem is the onSuccess but i couln't find anything that helped

@Override



        public void onSuccess(Location location)

        {

            if(location != null){



                Geocoder geocoder = new Geocoder(activityContext.getApplicationContext(), Locale.getDefault());

                List<Address> addresses = null;



                try {

                    addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1);



                } catch (IOException e) {

                    e.printStackTrace();

                }



                clientConnection.sendtoServer("loc",addresses.get(0).getCountryName()+","+addresses.get(0).getAdminArea());//this line is the problem 



            }

            else

                clientConnection.sendtoServer("loc","Not Found!");

        }

clientConnection.sendtoServer is the problem

//this is used for a Socket the class of the socket is clientConnection



public static void sendtoServer(String TextCode,String message){

        os.println(TextCode+" "+message);

        os.flush();

    }

this is my error

2019-01-01 19:24:51.037 7077-7077/com.example.victor.zactarget E/AndroidRuntime: FATAL EXCEPTION: main

Process: com.example.victor.zactarget, PID: 7077

android.os.NetworkOnMainThreadException

    at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1303)

    at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:111)

    at java.net.SocketOutputStream.write(SocketOutputStream.java:157)

    at java.io.PrintStream.write(PrintStream.java:492)

    at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221)

    at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:291)

    at sun.nio.cs.StreamEncoder.flushBuffer(StreamEncoder.java:104)

    at java.io.OutputStreamWriter.flushBuffer(OutputStreamWriter.java:185)

    at java.io.PrintStream.write(PrintStream.java:543)

    at java.io.PrintStream.print(PrintStream.java:687)

    at java.io.PrintStream.println(PrintStream.java:824)

    at com.example.victor.zactarget.ClientConnection.sendtoServer(ClientConnection.java:118)

    at com.example.victor.zactarget.Code$2.onSuccess(Code.java:66)

    at com.example.victor.zactarget.Code$2.onSuccess(Code.java:54)

    at com.google.android.gms.tasks.zzn.run(Unknown Source)

    at android.os.Handler.handleCallback(Handler.java:751)

    at android.os.Handler.dispatchMessage(Handler.java:95)

    at android.os.Looper.loop(Looper.java:154)

    at android.app.ActivityThread.main(ActivityThread.java:6688)

    at java.lang.reflect.Method.invoke(Native Method)

    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468)

    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358)

I found the Answer but is still I think it can be done better

public static void sendLocation(final ClientConnection clientConnection) throws InterruptedException

{





    final boolean ready = new boolean[1];

    final String locationString = new String[1];



    client = LocationServices.getFusedLocationProviderClient(activityContext);



    if (ActivityCompat.checkSelfPermission(activityContext, ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {



        clientConnection.sendtoServer("loc","Denied");

    }



    client.getLastLocation().addOnSuccessListener(activityContext, new OnSuccessListener<Location>() {



        @Override

        public void onSuccess(Location location)

        {

            if(location != null){



                Geocoder geocoder = new Geocoder(activityContext.getApplicationContext(), Locale.getDefault());

                List<Address> addresses = null;



                try {

                    addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1);



                } catch (IOException e) {

                    e.printStackTrace();

                }



                locationString[0] = addresses.get(0).getCountryName()+","+addresses.get(0).getAdminArea();



                /*

                String address = addresses.get(0).getSubLocality();

                String cityName = addresses.get(0).getLocality();

                String stateName = addresses.get(0).getAdminArea();

                String countryName = addresses.get(0).getCountryName();

                */



            }

            else

                locationString[0] ="Not Found!";



            ready[0] = true;

        }

    });



    while (ready[0] != true){

        TimeUnit.MILLISECONDS.sleep(500);

    }



    clientConnection.sendtoServer("loc", locationString[0]);

}