相关疑难解决方法(0)

美好的一天,我有一组JSONObject值,我从服务器收到并操作.大多数情况下,我得到一个带有值的JSONObject(比方说统计),有时,它会返回一个带有代码和错误描述的Error对象.现在我的问题是我如何构造我的代码,以便它在返回错误时不会中断.我以为我可以做到这一点,但不起作用.任何帮助将受到高度赞赏.谢谢

public void processResult(JSONObject result) {
    try {
        if(result.getJSONObject(ERROR) != null ){
            JSONObject error = result.getJSONObject(ERROR);
            String error_detail = error.getString(DESCRIPTION);
            if(!error_detail.equals(null)) {
                //show error login here
            }
            finish();
        }
        else {
            JSONObject info = result.getJSONObject(STATISTICS);
            String stats = info.getString("production Stats"));
        }
    }
}

我正在使用我的应用程序中Volley提出POST请求,在我的情况下,一个很好的响应是一个201空洞的身体.我正在使用JSONRequest,拨打电话.

我的问题是错误响应处理程序被调用,因为响应为空.

以下是我的要求:

    Request request = new JsonRequest<Object>(Request.Method.POST, url, body, new Response.Listener<Object>() {

        @Override
        public void onResponse(Object response) {

        }
    }, new ErrorListener(context)) {

        @Override
        protected Response<Object> parseNetworkResponse(NetworkResponse response) {

            Log.d(TAG, "success!!!!!!");
            if (response.statusCode == 201)
                mListener.resetPasswordWasSent();
            return null;
        }

        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            Map<String,String> params = new HashMap<String, String>();
            params.put("Content-Type","application/json");
            params.put("Accept", "application/json");
            return params;
        }
    };

    requestQueue.add(request);

我的parseNetworkResponse函数获取调用,那么ErrorListener,和onResponse因为我得到一个方法永远不会命中NullPointerException的ErrorListener …

这是我关于StackOverflow的第一个问题,很抱歉这个问题表达不好.

以下是logcat中的Json:

I/Result is: null{"coord":{"lon":-0.13,"lat":51.51},"weather":[{"id":300,"main":"Drizzle","description":"light intensity drizzle","icon":"09d"}],"base":"stations","main":{"temp":280.32,"pressure":1012,"humidity":81,"temp_min":279.15,"temp_max":281.15},"visibility":10000,"wind":{"speed":4.1,"deg":80},"clouds":{"all":90},"dt":1485789600,"sys":{"type":1,"id":5091,"message":0.0103,"country":"GB","sunrise":1485762037,"sunset":1485794875},"id":2643743,"name":"London","cod":200}

这是我的代码:

public class MainActivity extends AppCompatActivity {
    String weather,id,result;

    public class DownloadTask extends AsyncTask<String,Void,String>{

        @Override
        protected String doInBackground(String... urls) {
            try {
                URL url = new URL(urls[0]);
                HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
                InputStream inputStream = httpURLConnection.getInputStream();
                InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
                int data = inputStreamReader.read();

                while(data != -1){
                    char count = (char) data;
                    result += count;
                    data = inputStreamReader.read();
                }

                return result;

            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) { …