相关疑难解决方法(0)

我正在为JSONObject请求服务器,它包含一些ID的列表.这适用于Android 4.2,但不适用于Android 2.3(已在Device和Emulator上测试过.)

JSONObject如下.

{"IdList":[{"id":"004502"},{"id":"S007901"},{"id":"041501"},{"id":"S139001"}]}

这适用于4.2,但NullPointerException在2.3中显示.

我的LogCat如下:

org.json.JSONException: Value Nullpointer of type java.lang.String cannot be converted to JSONObject
06-06 11:23:46.881: W/System.err(1820):     at org.json.JSON.typeMismatch(JSON.java:107)
06-06 11:23:46.893: W/System.err(1820):     at org.json.JSONObject.<init>(JSONObject.java:158)
06-06 11:23:46.893: W/System.err(1820):     at org.json.JSONObject.<init>(JSONObject.java:171)
06-06 11:23:46.893: W/System.err(1820):     at my.Site.serverInterface.executeHttpRequest(serverInterface.java:128)
06-06 11:23:46.893: W/System.err(1820):     at my.Site.serverInterface.getAtmId(serverInterface.java:54)
06-06 11:23:46.901: W/System.err(1820):     at my.Site.TrackLocation$AtmGetter.doInBackground(TrackLocation.java:379)
06-06 11:23:46.901: W/System.err(1820):     at android.os.AsyncTask$2.call(AsyncTask.java:185)
06-06 11:23:46.901: W/System.err(1820):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
06-06 11:23:46.901: W/System.err(1820):     at java.util.concurrent.FutureTask.run(FutureTask.java:138)
06-06 11:23:46.901: W/System.err(1820):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
06-06 11:23:46.901: W/System.err(1820):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
06-06 11:23:46.901: W/System.err(1820):     at java.lang.Thread.run(Thread.java:1019) …

我想在我的Android应用程序中解析Json解析链接是https://www.buzzador.com/apps/present_software/webservice/index.php?op=ProductQ&campaign_id=607&userid=10776

当我把它放入Json对象时它会给我带来错误错误是:08-31 14:40:52.281:WARN/System.err(416):org.json.JSONException:java.lang.String类型的值无法转换到JSONObject

public static String getmyproductquestiondetails(String userid,
        String campaignid) {// https://www.buzzador.com/apps/present_software/webservice/index.php?op=EducationResult&userid=1&questionid=1,2,3&answergivenbyuser=1,1,0
    String data = null;
    try {

        URL url = new URL(
                "http://dignizant.com/buzz/webservice/index.php?op=getProductQuestion&userid="
                        + userid + "&campaign_id=" + campaignid);
        if (url.getProtocol().toLowerCase().equals("https")) {
            trustAllHosts();
            HttpsURLConnection https = (HttpsURLConnection) url
                    .openConnection();
            https.setHostnameVerifier(DO_NOT_VERIFY);
            http = https;
        } else {
            http = (HttpURLConnection) url.openConnection();
        }
    } catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    Utils utils = new …

我正在尝试使用从Web服务接收的以下字符串初始化JSONObject:

"{
    "campaignid": "8",
    "campaignname": "Pilotarienak 2011",
    "campaignlink": "http:\\/\\/www.xxx.com\\/fr\\/cote-basque\\/agenda\\/2011-05-20\\/FMAAQU064FS016DV-pilotarienak-d-anglet?fromapp",
    "splash": "http:\\/\\/www.xxx.com\\/ads\\/customers\\/pilotarienak\\/320x480.jpg",
    "banner": "http:\\/\\/www.xxx.com\\/ads\\/customers\\/pilotarienak\\/320x160.jpg"
}"

它似乎是有效的json(它在jsonlint.com中验证),但是在初始化JSONObject时,我得到:

org.json.JSONException: Value  of type java.lang.String cannot be converted to JSONObject

有人可以帮忙吗？

谢谢