Question

我正在尝试构建一个趣味测验游戏，但我正在努力寻找如何从Android Studio中的JSONArray中提取所需的字符串

我在Logcat中出现了“ JSON”和“结果”的日志，但是我似乎无法弄清楚如何将mQuestion变量设置为相关的字符串。

JSON

  myView.setOnTouchListener(new OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            float y = event.getY();
            float x = event.getX(); 
            //Using the xy coordinates I want the height of the touch in the view
            return false;
        }
    });

我的代码

{
"response_code":0,
"results":[{
    "category":"General Knowledge",
    "type":"multiple",
    "difficulty":"medium",
    "question":"According to the BBPA, what is the most common pub name in the UK?",
    "correct_answer":"Red Lion",
    "incorrect_answers": [ 
        "Royal Oak",
        "White Hart",
        "King&#039;s Head"
     ]
}]
}

我进入的Logcat是W / System.err：位于... MainActivity $ getQuestion.onPostExecute（MainActivity.java:67）

67是包含“ mQuestion = arr.getJSONObject（3）.getString（“ question”）;“

的行

Answer 1

您需要使用在循环中声明的i：

  mQuestion = arr.getJSONObject(i).getString("question");

Answer 2

您错误地解析了JsonObject和JsonArray。使用此代码：

 @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                Log.i("JSON", s);

                try {
                    JSONObject jsonObject = new JSONObject(s);
                    JSONArray results = jsonObject.getJSONArray("results");
                    JSONObject jsonObject1 = results.getJSONObject(0);
                    Log.i("results", results.toString());
                    String mQuestion = jsonObject1.getString("question");
                    Log.i("Question", mQuestion);

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


            }

从JSONArray提取字符串

2 个答案: