Android Studio – Cant convert String to double

So I got the latitude and longitude and successfully saved it on firebase, and now I was able to retrieve it and paste their values on a TextView.

I am planning to get the string value from the TextView and convert it to double and use that as a latitude and longitude to show a location on a map. I followed the format for converting string value to double value and it still wont work.

This is my code:

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

    String latitude = textViewLatt.getText().toString();
    String longitude = textViewLong.getText().toString();

    //Double latitude = Double.valueOf(textViewLatt.getText().toString());
    //Double longitude = Double.valueOf(textViewLong.getText().toString());

    double latt = Double.parseDouble(latitude);
    double longi= Double.parseDouble(longitude);

    //double latt = Double.valueOf(latitude);
    //double longi = Double.valueOf(longitude);

    // Add a marker in Sydney and move the camera
    LatLng sydney = new LatLng(latt, longi);
    mMap.addMarker(new MarkerOptions()
            .position(sydney)
            .title("Marker"));
    mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));

and these are the errors I got from debugging, I tried to search the problem and I couldnt find any solutions. Any help will be great.

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