Question

我正在尝试读取JSON对象并获取某个键的值。以下是JSON对象的截图：

以下是我使用的代码：

private void sendRequest(){
    try{
        URL url = new URL(ROOT + searchString + "&token=" + MYAPIKEY);
        HttpURLConnection http = (HttpURLConnection)url.openConnection();
        InputStream inputStream = http.getInputStream();
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));

        JSONObject testobject = new JSONObject(bufferedReader.readLine());

        String plot = testobject.getString("plot");
        //String plot = testobject.getString("plot:");
        publishProgress(plot);

        bufferedReader.close();
        inputStream.close();
        http.disconnect();
    }
    catch (IOException e){
        Log.e("ERROR", e.getMessage(), e);
        publishProgress();      //No data were found
    } catch (JSONException e) {
        e.printStackTrace();
    }
}

当我运行上面的代码时，我收到以下错误：

W / System.err：org.json.JSONException：没有情节值

就好像有一个JSON对象，但该对象不包含一个名为＆＃34; plot＆＃34;的键。（我试过＆＃34;剧情：＆＃34;同样，但那也没有奏效。）

问题：如何从plot-key中获取值？

Answer 1

试试这个。

try {
        JSONObject jsonObject = new JSONObject(response);
        JSONObject data = jsonObject.getJSONObject("data");
        JSONArray movies = data.getJSONArray("movies");
        for (int i = 0; i < movies.length(); i++) {
            JSONObject jo = movies.getJSONObject(i);
            // add has method
            if(jo.has("plot")){
                String plot = jo.getString("plot");
            }
        }
} catch (JSONException e) {
        e.printStackTrace();
}

Answer 2

首先，您需要解析data对象，然后从数据中解析movies数组。迭代后

JSONObject testobject = new JSONObject(bufferedReader.readLine());

JSONObject dataJson = testobject.getJSONObject("data")

JSONArray moviesArray = dataJson.getJSONArray("movies");
    for (int i = 0; i < moviesArray.length(); i++) {
    JSONObject jsonObj = moviesArray.getJSONObject(i);

    if(jsonObj.has("plot")){
        String plot = jsonObj.getString("plot");
    }
}

Android JSON对象getString没有价值

2 个答案: