//Button btnShowCoord;
//EditText edtAddress;
TextView txtCoord;
private GoogleMap mMap;

String lat1 = "0", lng1 = "0";
String adr = "проспект Маршала Жукова 24";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    new GetCoordinates().execute(adr.replace(" ","+"));

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

    //btnShowCoord = (Button) findViewById(R.id.btnShowCoordinates);
    //edtAddress = (EditText) findViewById(R.id.edtAddress);
    txtCoord = (TextView) findViewById(R.id.txtCoordinates);

}

private class GetCoordinates extends AsyncTask<String,Void,String> {
    ProgressDialog dialog = new ProgressDialog(MainActivity.this);

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        dialog.setMessage("Please wait....");
        dialog.setCanceledOnTouchOutside(false);
        dialog.show();
    }

    @Override
    protected String doInBackground(String... strings) {
        String response;
        try{
            String address = strings[0];
            HttpDataHandler http = new HttpDataHandler();
            String url = String.format("https://maps.googleapis.com/maps/api/geocode/json?address=%s",address);
            response = http.getHTTPData(url);
            return response;
        }
        catch (Exception ex)
        {

        }
        return null;
    }

    @Override
    protected void onPostExecute(String s) {
        try{
            JSONObject jsonObject = new JSONObject(s);

            String lat = ((JSONArray)jsonObject.get("results")).getJSONObject(0).getJSONObject("geometry")
                    .getJSONObject("location").get("lat").toString();
            String lng = ((JSONArray)jsonObject.get("results")).getJSONObject(0).getJSONObject("geometry")
                    .getJSONObject("location").get("lng").toString();

            lat1 = lat;
            lng1 = lng;

            txtCoord.setText(String.format("Coordinates : %s / %s ",lat,lng));

            if(dialog.isShowing())
                dialog.dismiss();

        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
}

@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;

    // Add a marker in Sydney and move the camera
    LatLng sydney = new LatLng(Double.parseDouble(lat1), Double.parseDouble(lng1));
    mMap.addMarker(new MarkerOptions().position(sydney).title("Marker"));
    mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
}}`