JSONObject is returning NULL Object-CodePudding

I'm trying to draw a Route Between A Box Image and the current Location on the Google map I could diplay the Box image and the Current Location Icon but when I need to draw A route between them the App crash.

My Code:

        private void drawRoute(LatLng yourLocation, String address) {

        mService.getGeoCode(address).enqueue(new Callback<String>() {
            @Override
            public void onResponse(Call<String> call, Response<String> response) {
                try {
                        JSONObject jsonObject = new JSONObject(responses.body().toString());
                        
                        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();
                        LatLng orderLocation = new LatLng(Double.parseDouble(lat), Double.parseDouble(lng));

                        Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.box);
                        bitmap = Common.scaleBitmap(bitmap, 70, 70);

                        MarkerOptions marker = new MarkerOptions().icon(BitmapDescriptorFactory.fromBitmap(bitmap))
                                .title("Order of"   Common.currentRequest.getPhone())
                                .position(orderLocation);
                        mMap.addMarker(marker);

                        //draw route
                        mService.getDirections(yourLocation.latitude   ","   yourLocation.longitude,
                                orderLocation.latitude   ","   orderLocation.longitude)
                                .enqueue(new Callback<String>() {
                                    @Override
                                    public void onResponse(Call<String> call, Response<String> response) {
                                        new ParserTask().execute(response.body().toString());
                                    }

                                    @Override
                                    public void onFailure(Call<String> call, Throwable t) {

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

            @Override
            public void onFailure(Call<String> call, Throwable t) {

            }
        });
    }

It Crash I think because it says that responses.body().toString() returns NULL.I Search A lot for A solution but didn't know how to solve this issue.

The ERROR:

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.ymmyserver, PID: 32071
    java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object retrofit2.Response.body()' on a null object reference
        at com.example.ymmyserver.TrackingOrder$1.onResponse(TrackingOrder.java:139)

The whole code on Github TrackingOrder Class:

https://github.com/zieadshabkalieh/YmmyApp/blob/main/TrackingOrder.java

CodePudding user response：

The error actually is that you can’t invoke body() on a NULL object, meaning your responses variable itself is NULL. Which is because you have a typo in there, your parameter is called response, while you are trying to access responses (mind the plural 's' at the end).

CodePudding user response：

Janik is correct, the error stems from you trying to access a property on an object that doesn't exist (NULL); I recommend play process of elimination by first debugging your API call, log the response (toString) to make sure first you are getting data, and that data does contain a body; follow up with the next part and so forth; sounds like the issue isn't with the JSONObject method but that the data you're consuming returns nothing (either nothing, or a different response than what you expect); debug it top to bottom you'll find the reason.