Http Status Code in Android Volley when error.networkResponse is null

Question

I am using Google Volley on the Android platform. I am having a problem in which the error parameter in onErrorResponse is returning a null n

Answer 1

This is how I check and grep error.

                // TimeoutError => most likely server is down or network is down.
                Log.e(TAG, "TimeoutError: " + (e instanceof TimeoutError));

                Log.e(TAG, "NoConnectionError: " + (e instanceof NoConnectionError));
                /*if(error.getCause() instanceof UnknownHostException ||
                    error.getCause() instanceof EOFException ) {
                    errorMsg = resources.getString(R.string.net_error_connect_network);
                } else {
                    if(error.getCause().toString().contains("Network is unreachable")) {
                        errorMsg = resources.getString(R.string.net_error_no_network);
                    } else {
                        errorMsg = resources.getString(R.string.net_error_connect_network);
                    }
                }*/

                Log.e(TAG, "NetworkError: " + (e instanceof NetworkError));
                Log.e(TAG, "AuthFailureError: " + (e instanceof AuthFailureError));
                Log.e(TAG, "ServerError: " + (e instanceof ServerError));
                //error.networkResponse.statusCode

                // inform dev
                Log.e(TAG, "ParseError: " + (e instanceof ParseError));
                //error.getCause() instanceof JsonSyntaxException

                Log.e(TAG, "NullPointerException: " + (e.getCause() instanceof NullPointerException));


                if (e.networkResponse != null) {
                    // 401 => login again
                    Log.e(TAG, String.valueOf(e.networkResponse.statusCode));

                    if (e.networkResponse.data != null) {
                        // most likely JSONString
                        Log.e(TAG, new String(e.networkResponse.data, StandardCharsets.UTF_8));

                        Toast.makeText(getApplicationContext(),
                                new String(e.networkResponse.data, StandardCharsets.UTF_8),
                                Toast.LENGTH_LONG).show();
                    }
                }
                else if (e.getMessage() == null) {
                    Log.e(TAG, "e.getMessage");
                    Log.e(TAG, "" + e.getMessage());

                    if (e.getMessage() != null && e.getMessage() != "")
                        Toast.makeText(getApplicationContext(),
                                e.getMessage(), Toast.LENGTH_LONG).show();
                    else
                        Toast.makeText(getApplicationContext(),
                                "could not reach server", Toast.LENGTH_LONG).show();
                }
                else if (e.getCause() != null) {
                    Log.e(TAG, "e.getCause");
                    Log.e(TAG, "" + e.getCause().getMessage());

                    if (e.getCause().getMessage() != null && e.getCause().getMessage() != "")
                        Toast.makeText(getApplicationContext(),
                                e.getCause().getMessage(), Toast.LENGTH_LONG).show();
                    else
                        Toast.makeText(getApplicationContext(),
                                "could not reach server", Toast.LENGTH_LONG).show();
                }