Question

当String请求post params值变为null并显示错误

NetworkDispatcher.run：未处理的异常java.lang.NullPointerException：尝试在空对象引用上调用虚方法'int java.lang.String.length（）'

我已完成调试，其中一个值为null。这是我的代码，

public void getResponsePOST(Activity activity, final String[] name,
        final String[] value) {
    final CustomProgressBar pDialog = new CustomProgressBar(activity,R.drawable.loading);

    //pDialog.setMessage("Loading...");
    pDialog.show();
    String tag_json_obj = "string_req";
    System.out.println("URL PRODUCT"+mRequestUrl);
    // RequestQueue queue = Volley.newRequestQueue(activity);
    StringRequest sr = new StringRequest(Request.Method.POST, mRequestUrl,
            new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    // Log.v("LOG", "9122014 " + response);
                    mResponseListener.responseSuccess(response.toString());
                    pDialog.dismiss();

                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    // Log.v("LOG", "9122014 " + error);
                    VolleyLog.d(TAG, "Error: " + error.getMessage());
                    mResponseListener.responseFailure(error.getMessage());
                    pDialog.dismiss();
                }
            }) {
        @Override
        protected Map<String, String> getParams() {
            Map<String, String> params = new HashMap<String, String>();
            for (int i = 0; i < name.length; i++) {

            try
            {
                params.put(name[i], value[i]);
            }
            catch(Exception e)
            {

            }
                //System.out.println("Names:"+name[i]);
                //System.out.println("Values:"+value[i]);
            }
            return params;
        }

        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            Map<String, String> params = new HashMap<String, String>();
            params.put("Content-Type", "application/x-www-form-urlencoded");
            return params;
        }
    };
    //Setting Timout Parameter : Bibin
    sr.setRetryPolicy(new DefaultRetryPolicy(1800 * 1000,DefaultRetryPolicy.DEFAULT_MAX_RETRIES , DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));

    // Adding request to request queue
    AppController.getInstance().addToRequestQueue(sr, tag_json_obj);
}

如何解决这个问题？

Answer 1

你必须尝试这个： -

docker-compose up -d

Android Volley字符串请求Params中的空值

1 个答案: