When checkbox selected, start Location updates

[Eli Kook]

Hello, I need help with a Weather application project for my school in android development: when the checkbox (preferences.xml) is checked, I need to start location update and when unchecked stop it.
I must have the android.lcation.LocationListener in a inner class.
The syntax is provider by the school, and I have been working on it for some time, but there are still a few things that I don't get:
How can I retrieve the JSON  information via my local location? and how do I set it with the checked box?
Here is my full code:

public class WeatherActivity extends AppCompatActivity {
    private static final String TAG = "WeatherActivity";
    public ConditionVariable fragmentReady;
    private boolean prefsChanged = false;
    private SharedPreferences.OnSharedPreferenceChangeListener sharedPreferenceListener;
    boolean useGps;
    LocationManager locationManger;

    int MY_PERMISSION = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        fragmentReady = new ConditionVariable(false);
        setContentView(R.layout.activity_weather_tablayout);
        TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
        tabLayout.addTab(tabLayout.newTab().setText("Weather"));
        tabLayout.addTab(tabLayout.newTab().setText("Settings"));
        tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
        //To insert child view that represent each page, we will use adapter, Ojbect from type
        //WeatherPagerAdapter invoking Fagement manager:
        PagerAdapter pageAdapter = new WeatherPageAdapter(getSupportFragmentManager());
        //Set the adapter to the view page via its id:
        final ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
        viewPager.setAdapter(pageAdapter);

        //Anonymous class to handle the event via a listener:
        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                if (tab.getPosition() == 0) {
                    WeatherRequestTask task = new WeatherRequestTask();
                    task.execute();
                }
                viewPager.setCurrentItem(tab.getPosition());
            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) {
                if (tab.getPosition() == 0 && prefsChanged == true) {
                    WeatherRequestTask task = new WeatherRequestTask();
                    task.execute();
                    prefsChanged = false;
                }
                viewPager.setCurrentItem(tab.getPosition());
            }

            @Override
            public void onTabReselected(TabLayout.Tab tab) {
            }
        });
        //Second handler to activate the right button:
        viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
        WeatherRequestTask task = new WeatherRequestTask();
        task.execute();
        //We set anonymous onSharedPreferenes class with a strong reference assigned to prevent the
        //garbage collection destroy the object of the sharedprefernces.
        sharedPreferenceListener = new SharedPreferences.OnSharedPreferenceChangeListener() {
            @Override
            public void onSharedPreferenceChanged(SharedPreferences prefs, String key) {
                prefsChanged = true;
                Log.d(getClass().getSimpleName(), "Setting Changed.");
                if (key.equals("use_gps")) {
                }
            }
        };
        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
        sharedPreferences.registerOnSharedPreferenceChangeListener(sharedPreferenceListener);

        //Acquire a reference to the system Location Manager
        locationManger = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        // Define a listener that responds to location updates
        final LocationListener locationListener = new LocationListener() {
            @Override
            public void onLocationChanged(Location location) {
                double lat = location.getLatitude();
                double lng = location.getLongitude();
            }

            @Override
            public void onStatusChanged(String provider, int status, Bundle extras) {
            }

            @Override
            public void onProviderEnabled(String provider) {
                Toast.makeText(WeatherActivity.this, "Enabled new provider", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onProviderDisabled(String provider) {
                Toast.makeText(WeatherActivity.this, "Disabled provider", Toast.LENGTH_SHORT).show();
            }
        };
        String provider = locationManger.getBestProvider(new Criteria(), false);
        if (ActivityCompat.checkSelfPermission(WeatherActivity.this, android.Manifest.permission.ACCESS_FINE_LOCATION)
                        != PackageManager.PERMISSION_GRANTED
                && ActivityCompat.checkSelfPermission(WeatherActivity.this, android.Manifest.permission.ACCESS_COARSE_LOCATION)
                        != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(WeatherActivity.this, new String[]{
                    android.Manifest.permission.INTERNET, Manifest.permission.ACCESS_FINE_LOCATION,
                    Manifest.permission.ACCESS_COARSE_LOCATION}, MY_PERMISSION);
        }
        // Register the listener with the Location Manager to receive location updates
        locationManger.requestLocationUpdates(provider, 1000, 1, locationListener);

    }
    //Inner static class to handle the page adapter, fragment stat pager adapter:
    public static class WeatherPageAdapter extends FragmentStatePagerAdapter {
        static final int NUM_TABS = 2;

        public WeatherPageAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            switch (position) {
                case 0:
                    return new WeatherFragment();
                case 1:
                    return new WeatherPreferenceFragment();
                default:
                    return null; } }

        @Override
        public int getCount() {
            return NUM_TABS;
        }  }


    @Override
    public void onResume() {
        super.onResume();
        WeatherRequestTask task = new WeatherRequestTask();
        task.execute();
    }

    //Implement the menu to update the weather data:
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == R.id.reconnect) {
            WeatherRequestTask task = new WeatherRequestTask();
            task.execute();
            Toast.makeText(WeatherActivity.this, "Weather data updated!", Toast.LENGTH_LONG).show();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    public class WeatherRequestTask extends AsyncTask<Void, Void, IWeatherAPI> {
        @Override
        protected IWeatherAPI doInBackground(Void... voids) {
            //For weather data current city, we use reflection api weather api factory
            //class via gps location. getDefaultSharedPreferences method return sharedpreferences obj.
            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(WeatherActivity.this);
            useGps = prefs.getBoolean("use_gps", false);
            String locationName = prefs.getString("location_name", "");
            String weatherProviderClass = prefs.getString("weather_provider_class", "");

            IWeatherAPI api = null;
            try{  api = WeatherAPIFactory.fromLocationName(weatherProviderClass, locationName);

            }catch (Exception ex){
                Log.e(getClass().getSimpleName(), ex.toString());
            }return api;
        }
        @Override
        protected void onPostExecute(IWeatherAPI api) {
            if (api == null) {
                Log.e(getClass().getSimpleName(), "doInBackground is null");
                Toast.makeText(WeatherActivity.this, "No data is availabe, please check connection settings", Toast.LENGTH_LONG).show();
                return;
            }
            try {

                Log.d(getClass().getSimpleName(), "Temperatur: " + api.getTemperature());
                Log.d(getClass().getSimpleName(), "Beschreibung: " + api.getDescription());
                Log.d(getClass().getSimpleName(), "Provider: " + api.getProviderInfo());
                Log.d(getClass().getSimpleName(), "Icon: " + api.getIconPath());

                TextView textViewTemperature = (TextView)WeatherActivity.this.findViewById(R.id.textview_temperature);
                textViewTemperature.setText((int)api.getTemperature() + "° C");
                TextView textViewDescription = (TextView)WeatherActivity.this.findViewById(R.id.textview_description);
                textViewDescription.setText(api.getDescription());
                TextView textViewProvider = (TextView)WeatherActivity.this.findViewById(R.id.textview_weatherprovider);
                textViewProvider.setText(api.getProviderInfo());
                //Set dynamic icon for the weather image:
                InputStream bitmapStream = getAssets().open(api.getIconPath());
                Bitmap bitmap = BitmapFactory.decodeStream(bitmapStream);
                ImageView imageView = (ImageView)WeatherActivity.this.findViewById(R.id.imageview_weathericon);
                imageView.setImageBitmap(bitmap);
            }catch (JSONException ex){
            Log.d(getClass().getSimpleName(),ex.toString());
            } catch (Exception ex) {
                Log.e(getClass().getSimpleName(), ex.toString());
              try {
                   Log.e(getClass().getSimpleName(), api.getError());
                   Toast.makeText(WeatherActivity.this, "Error: " + api.getError(),Toast.LENGTH_LONG).show();
                    } catch (Exception innerEx) {
                    Log.e(getClass().getSimpleName(), innerEx.toString());
                  Toast.makeText(WeatherActivity.this,"Unkown error. \nTry other server.",Toast.LENGTH_LONG).show();
                } }  } }
    }

[Eli Kook]

I have found the solution if anyone will be interested, here's my git:
GeoWeatherApp