永远不会执行Android JsonArrayRequest onResponse

Question

this issue has been bugging me all day. I have stepped through the program with the debugger and it never goes into the Response.Listener. It doesn't go into onErrorResponse either so the API isn't throwing an error.

protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_history_rewards);

    prf = new PrefManager(this);

    getSupportActionBar().setIcon(R.drawable.ic_back_icon);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setTitle(R.string.earning_history);


    listView = (ListView) findViewById(R.id.list);
    TextView emptyText = (TextView) findViewById(R.id.empty);
    emptyText.setText(getString(R.string.no_rewards_yet));
    adapter = new UserHistoryAdapter(EarningHistoryActivity.this, historyList);
    listView.setAdapter(adapter);
    listView.setEmptyView(emptyText);
    listView.setDivider(null);

    pDialog = new ProgressDialog(this);
    pDialog.setMessage(getString(R.string.loading));
    pDialog.show();

    // changing action bar color
    // getActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#1b1b1b")));

    JsonArrayRequest historyReq = new JsonArrayRequest(Config.Base_Url+"api/earning_history.php?username="+App.getInstance().getUsername(), new Response.Listener<JSONArray>() {
                @Override
                public void onResponse(JSONArray response) {

                    Log.d(TAG, response.toString());
                    hidePDialog();

                    // Parsing json
                    for (int i = 0; i < response.length(); i++) {
                        try {
                            JSONObject obj = response.getJSONObject(i);
                            UserHistory history = new UserHistory();
                            history.setTitle(obj.getString("type"));
                            history.setRating(obj.getString("date"));
                            history.setThumbnailUrl(Config.Base_Url+"images/reward.png");
                            history.setYear(obj.getString("points"));
                            //history.setGenre(obj.getString("time"));

                            historyList.add(history);

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

                    }

                    // notifying list adapter about data changes
                    // so that it renders the list view with updated data
                    adapter.notifyDataSetChanged();
                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            VolleyLog.d(TAG, "Error: " + error.getMessage());
            hidePDialog();

        }
    });

    // Adding request to request queue
    RequestQueue requestQueue = Volley.newRequestQueue(this);
    requestQueue.add(historyReq);

}

Any help would be greatly appreciated.

Edit: I added more code from the entire onCreate method to give some more information to help.

Answer 1

You have created historyReq object of class JsonArrayRequest;

Now there should be some method call inside JsonArrayRequest class which make utilize the Response.ErrorListener() object that you injected inside the historyReq. The injected objected inside historyReq should make use of on onErrorResponse method.

For more info you can see behavior of Anonymous class.