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

Question

我将获取 JSONObject 的值并将其放入字符串数组或 ArrayList 中。问题是我有一个 JSONObject 而不是 JSONArray，而且我无法更改 Web 服务。这是我的 JSONObject：

{"THR":"تهران", "MHD":"مشهد", "KIH":"کیش", "IFN":"اain", "SYZ":"Paintage", "TBZ":"init", "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);

当我调试我的代码时，它进入了 CATCH！！！无论如何，它不会去尝试！

我想要这样的东西：

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

如何获取？

Answer 1

public static void main(String[] args) {
//building your jsonObject(took only the 1st four ;P )
        JSONObject objJsonObject = new JSONObject();
        objJsonObject.put("THR", "تهران");
        objJsonObject.put("MHD", "مشهد");
        objJsonObject.put("KIH", "کیش");
        objJsonObject.put("IFN", "اصفهان");
        String [] strArray= new String[objJsonObject.length()];
        int i = 0;
//adding your required data into a array
        for (String key: objJsonObject.keySet()) {
            strArray[i] = objJsonObject.getString(key);
            i++;
        }
//printing your data
        for (int j = 0; j < strArray.length; j++) {
            System.out.println(strArray[j]);
        }
}

希望这对您有所帮助....

Answer 2

对您的代码进行了更改

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);

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

How to convert a JSONObject to a String Array or ArrayList<String> in android

java

arrays

android

jsonobject