Question

我有这样的代码，jArrAnswer的值是

[{"answer":"Yes"},{"answer":"No"},{"answer":"maybe"},{"answer":"yrg"}]

jArrAnswer.length()的结果是4

但为什么我收到错误

org.json.JSONException：索引1超出范围[0..1）。

 try {
        JSONArray jArrAnswerid = new JSONArray(answerid);
        JSONArray jArrAnswer = new JSONArray(answer);
        for (int i = 0; i < jArrAnswer.length(); i++) {
            JSONObject jObjAnswerid = jArrAnswerid.getJSONObject(i);
            JSONObject jObjAnswer = jArrAnswer.getJSONObject(i);
            String ansid = jObjAnswerid.getString("answerid");
            String ans= jObjAnswer.getString("answer");
            GroupModel item2 = new GroupModel(String.valueOf(i + 1), ans, ansid);
        }
} catch (Exception e) {
        Log.w("asdf", e.toString());
}

Answer 1

当您将索引for loop提取到jArrAnswer时，您正在i重复jArrAnswerid。

检查并确保jArrAnswerid.size() <{1}}与<{1}} 相等。

打印jArrAnswer.size()并检查。

Answer 2

试试这个

$queryold="SELECT * FROM tablename order by  STR_TO_DATE(column_name,'%d/%m/%Y')";

提供“answer”是你的json数组响应

Answer 3

尝试

String json = "[{\"answer\":\"Yes\",\"answerid\":\"1\"},{\"answer\":\"No\",\"answerid\":\"2\"},{\"answer\":\"maybe\",\"answerid\":\"3\"},{\"answer\":\"yrg\",\"answerid\":\"4\"}]";

try {
    JSONArray jsonArray = new JSONArray(json);
    if(jsonArray != null) {
        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject jsonObject = jsonArray.getJSONObject(i);
            String answerId = jsonObject.getString("answerid");
            String answer = jsonObject.getString("answer");
            //Use answerId and answer
        }
    }
} catch(JSONException e) {
    e.printStackTrace();
}

android JSONException索引1超出范围[0..1]（在1个循环中解析2个json数组）

3 个答案: