Android not make GET request after app closing from Service

Question

First of all sorry if such sort of question is already asked before.

I want to make a app which make a GET request or Simply Open A URL to tell server that app is closed now, no output is needed just load URL.

What I already tried:

1. I used Volley but unfortunately its not a solution in this case.

2. I also tried to make AsyncTask but seriously friend its weird its also not working

Only what's work is a simple line of code:

URL url = new URL("URL HERE"); 
InputStream stream = url.openStream();

but cause NetworkException. I just want to Execute a URL from Service after app closing.

Sample Codes Will Appreciate

THanks In Advance

Update Section

public class Service extends android.app.Service {

    public int isExecuted = 0;


    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onCreate() {
        super.onCreate();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.e("rrLOG", "Service Started");
        checkClosing();
        return Service.START_NOT_STICKY;
    }

    @Override
    public void onTaskRemoved(Intent rootIntent) {
        super.onTaskRemoved(rootIntent);
        Log.e("rrLOG", "Service Stopped");
        updateServer(UPDATE_OFFLINE);
        stopSelf();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.e("rrLOG", "Service Destroyed");
        updateServer(UPDATE_OFFLINE);
        stopSelf();
    }

    public void checkClosing(){

        new Timer().scheduleAtFixedRate(new TimerTask() {
            @Override
            public void run() {
                if (Helper.isAppRunning(Service.this, getPackageName())) {
                    Log.i("rrLOG", "App Is Running");
                } else {
                    Log.i("rrLOG", "App Is Not Running");
                    updateServer(UPDATE_OFFLINE);
                    stopSelf();
                }
            }
        }, 0, 500);//put here time 1000 milliseconds=1 second

    }

    static class RequestTask extends AsyncTask<String, String, String> {

        @Override
        protected String doInBackground(String... uri) {
            HttpClient httpclient = new DefaultHttpClient();
            HttpResponse response;
            String responseString = null;
            try {
                response = httpclient.execute(new HttpGet(uri[0]));
                StatusLine statusLine = response.getStatusLine();
                if(statusLine.getStatusCode() == HttpStatus.SC_OK){
                    ByteArrayOutputStream out = new ByteArrayOutputStream();
                    response.getEntity().writeTo(out);
                    responseString = out.toString();
                    out.close();
                } else{
                    //Closes the connection.
                    response.getEntity().getContent().close();
                    throw new IOException(statusLine.getReasonPhrase());
                }
            } catch (ClientProtocolException e) {
                //TODO Handle problems..
            } catch (IOException e) {
                //TODO Handle problems..
            }
            return responseString;
        }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
            //Do anything with response..
        }
    }

    public void updateServer(final String urlJsonArry) {

        Log.i("rrLOG", urlJsonArry);

        new RequestTask().execute(urlJsonArry);

    }


}

UPDATE2 Section

public class Service extends android.app.Service {

    public int isExecuted = 0;


    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onCreate() {
        super.onCreate();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.e("rrLOG", "Service Started");
        checkClosing();
        return Service.START_NOT_STICKY;
    }

    @Override
    public void onTaskRemoved(Intent rootIntent) {
        //super.onTaskRemoved(rootIntent);
        Log.e("rrLOG", "Service Stopped");
        updateServer(UPDATE_OFFLINE);
    }

    @Override
    public void onDestroy() {
        //super.onDestroy();
        Log.e("rrLOG", "Service Destroyed");
        updateServer(UPDATE_OFFLINE);
    }

    public void checkClosing(){

        new Timer().scheduleAtFixedRate(new TimerTask() {
            @Override
            public void run() {
                if (Helper.isAppRunning(Service.this, getPackageName())) {
                    Log.i("rrLOG", "App Is Running");
                } else {
                    Log.i("rrLOG", "App Is Not Running");
                    updateServer(UPDATE_OFFLINE);
                }
            }
        }, 0, 500);//put here time 1000 milliseconds=1 second

    }

    public class NetworkTask extends AsyncTask<Void,Void,String> {

        @Override
        protected String doInBackground(Void... voids) {
            Log.i("rrLOG", String.valueOf(isExecuted));
            URL url = null; //get URL from your uri object
            try {
                url = new URL(UPDATE_OFFLINE);
            } catch (MalformedURLException e) {
                e.printStackTrace();
            }
            try {
                InputStream stream = url.openStream();
            } catch (IOException e) {
                e.printStackTrace();
            }
            Log.i("rrLOG", String.valueOf(url));
            return String.valueOf(url);
        }

        @Override
        protected void onPostExecute(String result) {
            Log.i("rrLOG", "onPostExecute");
            super.onPostExecute(result);
            stopSelf();
        }
    }


    public void updateServer(String urlJsonArry) {

        Log.i("rrLOG", urlJsonArry);

            if(isExecuted == 0) {
                new NetworkTask().execute();
                isExecuted = 1;
            }

    }


}

Answer 1

In Android, every network request is to be made on worker thread. That thread is different to UI thread. You have to make network request in background via AsyncTask. Example below:

public class NetworkTask extends AsyncTask<Void,Void,Void> {
    public Void doInBackground() {
        // Here you can make network request 
    }
} 

Now you can make this request inside a Service, so even if your activity is killed the network request will go through.

Kindly ensure you have internet permissions in Manifest.

Edit:

I checked the attached code in question, you are trying to stop the service at the same time when you have triggered a network request. If you do so, your network request won't be even completed before it is killed by the system.

You can kill service once your network request is completed, i.e. inside onPostExecute of AsyncTask.

Answer 2

public class NetworkTask extends AsyncTask<Void,Void,String> {

    @Override
    protected String doInBackground(Void... voids) {
        SessionManager manager=new SessionManager ();
        Log.i("rrLOG", String.valueOf(isExecuted));
        URL url = null; //get URL from your uri object
        try {
            url = new URL(paste your url);
        } catch (MalformedURLException e) {
            e.printStackTrace ();
        }
        try {
            InputStream stream = url.openStream();
        } catch (IOException e) {
            e.printStackTrace();
        }
        Log.i("rrLOG", String.valueOf(url));
        return String.valueOf(url);
    }

    @Override
    protected void onPostExecute(String result) {
        Log.i("rrLOG", "onPostExecute");
        super.onPostExecute(result);
        stopSelf();
    }
}


public void updateServer(String url) {

    Log.i("rrLOG", urlJsonArry);

    if(isExecuted == 0) {
        new NetworkTask().execute();
        isExecuted = 1;
    }
}