如何在Android中将JSONObject转换为字符串数组或ArrayList <String>

debugcn 发表于 Dev

阿里雷扎·诺拉里（Alireza Noorali）

我将获取JSONObject的值并将其放入String Array或ArrayList中。问题是我有一个JSONObject而不是JSONArray，并且我不能更改Webservice。这是我的JSONObject：

{“ THR”：“تهران”，“ MHD”：“مشهد”，“ KIH”：“کیش”，“ IFN”：“اصفهان”，“ SYZ”：“شیراز”，“ TBZ”：“تبریز”，“ ABD“：”آبادان“}

这是我的代码：

    ProgressBar progressbar = (ProgressBar) findViewById(R.id.progressbar);
    RequestQueue queue = Volley.newRequestQueue(getApplicationContext());

    progressbar.setVisibility(View.VISIBLE);
    StringRequest stringRequest = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            Toast.makeText(getApplicationContext(), "Response", Toast.LENGTH_SHORT).show();
            progressbar.setVisibility(View.GONE);

            try {
                JSONArray array = new JSONArray(response);
                Toast.makeText(getApplicationContext(), "Try", Toast.LENGTH_LONG).show();
            } catch (JSONException e) {
                e.printStackTrace();
                Toast.makeText(getApplicationContext(), "Catch", Toast.LENGTH_LONG).show();
            }

        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            Toast.makeText(getApplicationContext(), "Error", Toast.LENGTH_SHORT).show();
            progressbar.setVisibility(View.GONE);
        }
    });

    queue.add(stringRequest);

当我调试代码时，它会转到CATCH ！！！无论如何，它都不去尝试！

我想要这样的东西：

String[] strArray = {"تهران","مشهد","کیش","اصفهان","شیراز","تبریز","آبادان"};

我怎么才能得到它？

sammyShenker

在您的代码中添加了更改

ProgressBar progressbar = (ProgressBar) findViewById(R.id.progressbar);
    RequestQueue queue = Volley.newRequestQueue(getApplicationContext());
    ArrayList<String> answersStringArray= new ArrayList<String>(); // define string array

progressbar.setVisibility(View.VISIBLE);
    StringRequest stringRequest = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            Toast.makeText(getApplicationContext(), "Response", Toast.LENGTH_SHORT).show();
            progressbar.setVisibility(View.GONE);

            try {
                JJSONObject jsonObject = new JSONObject(response); //cast responce to jsonObject
                Iterator<?> keys = jsonObject.keys(); // get the keys of the jsonObject
                while( keys.hasNext() ) {//iterrate over them
                    String key = (String)keys.next();
                    answersStringArray.add(jsonObject.optString(key));}// add the string to our array of stings


          } catch (JSONException e) {
                e.printStackTrace();
                Toast.makeText(getApplicationContext(), "Catch", Toast.LENGTH_LONG).show();
            }

        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            Toast.makeText(getApplicationContext(), "Error", Toast.LENGTH_SHORT).show();
            progressbar.setVisibility(View.GONE);
        }
    });

    queue.add(stringRequest);

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