Question

我的JSON数组如下： [{ “ID”： “1”， “名称”： “ABC”}，{ “ID”： “2”， “名称”： “XYZ”}]

我希望它被解析。

我这样做了：

protected JSONObject doInBackground(String... args)
{
    json = jParser.getJSONFromUrl(url);
    //Log.e("JSON Data", json.toString());
    return json;
}

protected void onPostExecute(JSONObject json)
{
    pDialog.dismiss();
    // Getting JSON Array from URL
    mydataset = json.getJSONArray("data");
    Log.d("Till Here", mydataset.toString());
}

但是“Till Here”并没有出现在日志中，这意味着我正在做其他事情。有人可以帮忙吗？

Answer 1

我建议您使用optJSONArray()类似

的方法

mydataset = json.optJSONArray("data");

因为它不需要被try / catch包围，但你应该小心null 另外，我们看不到JSONObject json是什么 - 它是JSONObject还是JSONArray？如果它是第二个，那么您的代码是错误的，因为您需要操作JSONArray而不是JSONObject：

protected JSONArray doInBackground(String... args)
{
    json = jParser.getJSONFromUrl(url);
    Log.d("JSON Data", json.toString());
    return json;
}

protected void onPostExecute(JSONArray json)
{
    pDialog.dismiss();
    // Got JSON Array from URL already
    Log.d("b4 tHere", String.valueOf(json));
    mydataset = json;
    Log.d("Till Here", String.valueOf(mydataset));
}

Answer 2

    public static JSONArray getJSONfromURL(String url){
        InputStream is = null;
        String result = "";
        JSONArray jArray = null;

                HttpClient httpclient = new DefaultHttpClient();
                HttpGet httpget = new HttpGet(url);
                HttpResponse response = httpclient.execute(httpget);
                HttpEntity entity = response.getEntity();
                is = entity.getContent();

                BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
                StringBuilder sb = new StringBuilder();
                String line = null;
                while ((line = reader.readLine()) != null) {
                        sb.append(line + "\n");
                }
                is.close();
                result=sb.toString();

            jArray = new JSONArray(result);            
        return jArray;
    }

}    

 protected JSONArray doInBackground(String... args)
    {
        json = jParser.getJSONFromUrl(url);
        //Log.e("JSON Data", json.toString());
        return json;
    }

    protected void onPostExecute(JSONArray json)
    {
        pDialog.dismiss();
        try {

                    for (int i = 0; i < jsonArray.length(); i++) {
                        JSONObject jsobj = jsonArray.getJSONObject(i);

                        String id = jsobj.getString("id");

                        String name = jsobj.getString("name");
                        Log.e("MainActivity"," >>> id = " + id + " >> name = "  +name);

                    }
                } catch (JSONException e) {
                }
    }

解析没有主索引键的对象数组

2 个答案: