VolleyPlus : NetworkDispatcher.run: Unhandled exception java.lang.NullPointerException

Question

I am trying to run below code:

Map requestMap = new HashMap<>();
Long unixTime = System.currentTimeMillis() / LONG_1000;
requestM         


        

Answer 1

You need to override the parseNetworkResponse method in StringRequest and fix a vulnerability which does not anticipate a null header map:

StringRequest stringRequest =  new StringRequest(Request.Method.GET, url, new Response.Listener() {
    @Override
    public void onResponse(String response) {
        Log.d(TAG, response);
    }
}, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
        Log.e(TAG, error.getLocalizedMessage());
    }
}) {
    @Override
protected Response parseNetworkResponse(NetworkResponse response) {
        if (response.headers == null)
        {
            // cant just set a new empty map because the member is final.
            response = new NetworkResponse(
                               response.statusCode,
                               response.data,
                               Collections.emptyMap(), // this is the important line, set an empty but non-null map.
                               response.notModified,
                               response.networkTimeMs);


        }

        return super.parseNetworkResponse(response);
    }
};

Hope this helps.