Where should I call my update map function?I need to call it after my Async Task?

Issue

Hi I 'm new to Android programming and I have an app that when user clicks on a country it starts another activity displaying an a map with a marker locating the capital city.

But I need to get the capital from my async task method.So it needs to return country info and then I can update my map.I called my update map method in onPost Execute but the app just crashes?

In my on Create

 mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
    mapFragment.getMapAsync( this);


    new GetCountryDetails().execute(selectedCountry);

Then in my Async task

private class GetCountryDetails extends AsyncTask<String, String, CountryInfo> {

    @Override
    protected CountryInfo doInBackground(String... params) {
       CountryInfo countryInfo = null;

In my onPostExecute

protected void onPostExecute(CountryInfo countryInfo) {
    countryCapital=countryInfo.getCapital();

    updateMap(map);//doesn't work here

onMapReady:

public void onMapReady(GoogleMap map) {
    map.setMapType(GoogleMap.MAP_TYPE_HYBRID);
    map.getUiSettings().setMapToolbarEnabled(true);

updateMap

         public void updateMap(GoogleMap map){
    LatLng capitalCity = getCityLatitude(this, countryCapital);
       map.moveCamera(CameraUpdateFactory.newLatLng(capitalCity));

        MarkerOptions marker = new MarkerOptions().position(capitalCity).title( countryCapital);
        map.addMarker(marker);

    }

Any help will be appreciated thank!

I

Solution

Create Map varible as activity field.And define variable in onMapReady function.After that use activity variable as you want. I think it should works.

GoogleMap map;

public void onMapReady(GoogleMap map) {

    this.map = map;
    map.setMapType(GoogleMap.MAP_TYPE_HYBRID);
    map.getUiSettings().setMapToolbarEnabled(true);
}

Answered By - Kishan Thakar