Android以及如何将字符串对象更改为json对象

Question

我正在尝试使用 RESTful 服务从我的服务器获取响应，我以 json 格式将其取回，更改为字符串变量，然后尝试从字符串变量更改为 json 对象，但我在这里遇到错误是我的班级，在我的班级是我的堆栈跟踪，然后是我的字符串变量之后，当我尝试从字符串转换为 json 对象时发生错误，感谢您的帮助：

private class DownloadWebPageTask extends AsyncTask<String, Void, String> {
        @Override
        protected String doInBackground(String... urls) {
            String response = "";
            for (String url : urls) {
                DefaultHttpClient client = new DefaultHttpClient();
                HttpGet httpGet = new HttpGet(url);
                try {
                    HttpResponse execute = client.execute(httpGet);
                    InputStream content = execute.getEntity().getContent();

                    BufferedReader buffer = new BufferedReader(
                            new InputStreamReader(content));
                    String s = "";
                    while ((s = buffer.readLine()) != null) {
                        response += s;
                    }

                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            try {
                //JSONObject json = new JSONObject(response);
                JSONObject data = new JSONObject(response).getJSONObject("type");

            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            return response;
        }

11-14 09:53:26.192：W/System.err(560)：org.json.JSONException：值 [{"type":"HumVideoMovingImage","location":"http://hummedia.byu.edu/watch/humvideo:0373889/","label":"Harry Potter und der Orden des 凤凰","videoinfo":{"id":"humvideo:0373889","title":"哈利波特与 秩序之神 凤凰”，“身高”：480，“覆盖”：“BYU”，“状态”：“允许”，“主题”：“哈利 Potter,magic","description":"Lord Voldemort ist zuruckgekehrt, doch das Zaubereiministerium tut alles, um diese Tatsache der Geme ...","width":716,"rights":"shared","language":["de"],"runningtime":7200,"date":"2007-04-11"}},{ "type":"HumVideoMovingImage","location":"http://hummedia.byu.edu/watch/humvideo:0330373/","label":"Harry 波特时代 Feuerkelch","videoinfo":{"id":"humvideo:0330373","title":"哈利波特 下 Feuerkelch","height":480,"coverage":"BYU","status":"allowed","subject":"Harry Potter,magic","description":"Das Grosse Abenteuer beginnt, als der Feuerkelch Harry Potters Namen freigibt und Harry damit Teilne ...","width":716,"rights":"shared","language":["de"],"runningtime":7200,"date":"2005-11-18"}},{ "type":"HumVideoMovingImage","location":"http://hummedia.byu.edu/watch/humvideo:0304141/","label":"Harry Potter und der Gefangene von 阿斯卡班","videoinfo":{"id":"humvideo:0304141","title":"哈利波特 德格凡热内冯 Askaban","height":480,"coverage":"BYU","status":"allowed","subject":"Harry Potter,magic","description":"Wahrend die abscheuliche Tante Magda uber den Nachthimmel schwebt, kehrt Harry nach Hogwarts zuruck, ...","width":716,"rights":"shared","language":["de"],"runningtime":7200,"date":"2003-06-04"}},{ "type":"HumVideoMovingImage","location":"http://hummedia.byu.edu/watch/humvideo:0295297/","label":"Harry 波特与死卡默 Desschreckens","videoinfo":{"id":"humvideo:0295297","title":"哈利 波特与死卡默 Desschreckens","height":480,"coverage":"BYU","status":"allowed","subject":"Harry Potter,magic","description":"Fliegende Autos, gemeingefahliche Baume und die Warnung eines mysteriosen Hauselfen - so begin fu ...","width":716,"rights":"shared","language":["de"],"runningtime":7200,"date":"2002-11-15"}},{ "type":"HumVideoMovingImage","location":"http://hummedia.byu.edu/watch/humvideo:0241527/","label":"Harry 波特与德斯坦德 Weisen","videoinfo":{"id":"humvideo:0241527","title":"哈利波特与 德施泰德 Weisen","height":480,"coverage":"BYU","status":"allowed","subject":"Harry Potter,magic","description":"In der zauberhaften Verfilmung J.K. Rowlings Weltbestseller erfahrt Harry Potter an seinem 11. Gebur ...","width":716,"rights":"shared","language":["de"],"runningtime":7200,"date":"2001-11-16"}}] org.json.JSONArray 类型的无法转换为 JSONObject 11-14 09:53:26.232：W/System.err(560)：在 org.json.JSON.typeMismatch(JSON.java:111) 11-14 09:53:26.242: W/System.err(560)：在 org.json.JSONObject.(JSONObject.java:158) 11-14 09:53:26.252: W/System.err(560): 在 org.json.JSONObject.(JSONObject.java:171) 11-14 09:53:26.262: W / System.err（560）：在 de.vogella.android.asynctask.ReadWebpageAsyncTask$DownloadWebPageTask.doInBackground(ReadWebpageAsyncTask.java:56) 11-14 09:53:26.332: W/System.err(560): 在 de.vogella.android.asynctask.ReadWebpageAsyncTask$DownloadWebPageTask.doInBackground(ReadWebpageAsyncTask.java:1) 11-14 09:53:26.352: W/System.err(560): 在 android.os.AsyncTask$2.call(AsyncTask.java:264) 11-14 09:53:26.372: W / System.err（560）：在 java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 11-14 09:53:26.382: W/System.err(560): 在 java.util.concurrent.FutureTask.run(FutureTask.java:137) 11-14 09:53:26.392：W/System.err(560)：在 android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208) 11-14 09：53：26.402：W / System.err（560）：在 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 11-14 09:53:26.412: W/System.err(560): 在 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 11-14 09:53:26.422: W/System.err(560): 在 java.lang.Thread.run(Thread.java:856) 11-14 09:53:34.635: D/dalvikvm(169)：GC_CONCURRENT 释放 396K，7% 释放 7350K/7879K，暂停 21ms+9ms

字符串变量：

[ { "type": "HumVideoMovingImage",
“视频信息”：{“状态”：“允许”，
"description": "Lord Voldemort ist zuruckgekehrt, doch das Zaubereiministerium tut alles, um diese Tatsache der Geme ...",
“身高”：480，“覆盖率”：“BYU”，“日期”： "2007-04-11", "id": "humvideo:0373889",
“主题”：“哈利波特，魔法”，“语言”：[“de”]，
“权利”：“共享”，“标题”：“哈利波特与秩序之光” des Phonix”，“运行时间”：7200，“宽度”：716 }， “地点”： “http://hummedia.byu.edu/watch/humvideo:0373889/”、“标签”： “哈利波特与凤凰秩序”}, {
“类型”：“HumVideoMovingImage”，“视频信息”：{
“状态”：“允许”，“描述”：“Das Grosse Abenteuer” begint, als der Feuerkelch Harry Potters Namen freigibt und Harry damit Teilne ...”，“身高”：480，“覆盖率”： “BYU”、“日期”：“2005-11-18”、“id”： "humvideo:0330373", "subject": "哈利波特，魔法",
“语言”：[“de”]，“权利”：“共享”，
"title": "Harry Potter und der Feuerkelch",
“运行时间”：7200，“宽度”：716 }，
“位置”：“http://hummedia.byu.edu/watch/humvideo:0330373/”，
“标签”：“哈利波特与费尔克尔奇”}，{ “类型”：“HumVideoMovingImage”，“视频信息”：{
“状态”：“允许”，“描述”：“Wahrend die abscheuliche Tante Magda uber den Nachthimmel schwebt, kehrt Harry nach Hogwarts zuruck, ...", "height": 480,
“覆盖”：“BYU”，“日期”：“2003-06-04”，
“id”：“humvideo：0304141”，“主题”：“哈利 Potter,magic", "language": ["de"], "rights": "shared", "title": "Harry Potter und der Gefangene von 阿斯卡班”，“运行时间”：7200，“宽度”：716
}， “地点”： “http://hummedia.byu.edu/watch/humvideo:0304141/”、“标签”： 《哈利·波特与格凡吉娜·冯·阿斯卡班》},
{“类型”：“HumVideoMovingImage”，“视频信息”：{ “状态”：“允许”，“描述”：“Fliegende Autos， gemeingefahrliche Baume und die Warnung eines mysteriosen Hauselfen - 所以开始fu ...”，“身高”：480，“覆盖率”： “BYU”、“日期”：“2002-11-15”、“id”： "humvideo:0295297", "subject": "哈利波特，魔法",
“语言”：[“de”]，“权利”：“共享”，
"title": "Harry Potter und die Kammer Desschreckens",
“运行时间”：7200，“宽度”：716 }，
“位置”：“http://hummedia.byu.edu/watch/humvideo:0295297/”，
"label": "Harry Potter und die Kammer Desschreckens" },
{“类型”：“HumVideoMovingImage”，“视频信息”：{ “状态”：“允许”，“描述”：“在 der zauberhaften Verfilmung J.K.罗琳世界畅销书 erfahrt Harry Potter an seinem 11. Gebur ...”，“身高”：480，“覆盖率”：“BYU”，“日期”：“2001-11-16”，“id”： "humvideo:0241527", "subject": "哈利波特，魔法",
“语言”：[“de”]，“权利”：“共享”，
"title": "Harry Potter und der Stein der Weisen",
“运行时间”：7200，“宽度”：716 }，
“位置”：“http://hummedia.byu.edu/watch/humvideo:0241527/”，
"label": "Harry Potter und der Stein der Weisen" }

    ]

通过尝试使用以下代码： JSONObject jObject = new JSONObject(response);

我仍然收到错误，这是堆栈跟踪：

11-14 10:03:02.713: W/System.err(622): org.json.JSONException: Value [{"type":"HumVideoMovingImage","location":"http://hummedia.byu .edu/watch/humvideo:0373889/","label":"Harry Potter und der Orden des Phonix","videoinfo":{"id":"humvideo:0373889","title":"Harry Potter und der Orden des Phonix","height":480,"coverage":"BYU","status":"allowed","subject":"Harry Potter,magic","description":"Lord Voldemort ist zuruckgekehrt, doch das Zaubereiministerium tut alles, um diese Tatsache der Geme ...","width":716,"rights":"shared","language":["de"],"runningtime":7200,"date":"2007- 04-11"}},{"type":"HumVideoMovingImage","location":"http://hummedia.byu.edu/watch/humvideo:0330373/","label":"Harry Potter und der Feuerkelch" ,"videoinfo":{"id":"humvideo:0330373","title":"Harry Potter und der Feuerkelch","height":480,"coverage":"BYU","status":"allowed", "subject":"Harry Potter,magic","description":"Das Grosse Abenteuer begint, als der Feuerkelch Harry Potters Namen freigibt und Harry damit Teilne ...", "width":716,"rights":"shared","language":["de"],"runningtime":7200,"date":"2005-11-18"}},{"type":" HumVideoMovingImage","location":"http://hummedia.byu.edu/watch/humvideo:0304141/","label":"Harry Potter und der Gefangene von Askaban","videoinfo":{"id":" humvideo:0304141","title":"Harry Potter und der Gefangene von Askaban","height":480,"coverage":"BYU","status":"allowed","subject":"Harry Potter,magic ","description":"Wahrend die abscheuliche Tante Magda uber den Nachthimmel schwebt, kehrt Harry nach Hogwarts zuruck, ...","width":716,"rights":"shared","language":["de" ],"runningtime":7200,"date":"2003-06-04"}},{"type":"HumVideoMovingImage","location":"http://hummedia.byu.edu/watch/humvideo: 0295297/","label":"Harry Potter und die Kammer Desschreckens","videoinfo":{"id":"humvideo:0295297","title":"Harry Potter und die Kammer Desschreckens","height":480 ,"coverage":"BYU","status":"allowed","subject":"Harry Potter,magic","description":"Fliegende Autos, gemeingefahrliche Baume und die Warnung ein es mysteriosen Hauselfen - 所以开始 fu ...","width":716,"rights":"shared","language":["de"],"runningtime":7200,"date":"2002-11 -15"}},{"type":"HumVideoMovingImage","location":"http://hummedia.byu.edu/watch/humvideo:0241527/","label":"Harry Potter und der Stein der Weisen ","videoinfo":{"id":"humvideo:0241527","title":"Harry Potter und der Stein der Weisen","height":480,"coverage":"BYU","status":"允许","subject":"哈利波特，魔法","description":"In der zauberhaften Verfilmung JK Rowlings Weltbestseller erfahrt Harry Potter an seinem 11. Gebur ...","width":716,"rights":"shared","language":["de"],"runningtime":7200,"date":" org.json.JSONArray 类型的 2001-11-16"}}] 无法转换为 JSONObject 11-14 10:03:02.732: W/System.err(622): 在 org.json.JSON.typeMismatch(JSON.java:111) 11-14 10:03:02.752: W/System.err(622): 在 org.json.JSONObject.(JSONObject.java:158) 11-14 10:03:02.762: W/System.err(622): 在 org.json.JSONObject.(JSONObject.java:171) 11-14 10:03:02.822: W/System.err(622): 在 de.vogella.android.asynctask.ReadWebpageAsyncTask$DownloadWebPageTask.doInBackground(ReadWebpageAsyncTask.java:56) 11-14 10:03:02.842: W/System.err(622): 在 de.vogella.android.asynctask.ReadWebpageAsyncTask$DownloadWebPageTask.doInBackground(ReadWebpageAsyncTask.java:1) 11-14 10:03:02.852: W/System.err(622): 在 android.os.AsyncTask$2.call(AsyncTask.java:264) 11-14 10:03:02.872: W/System.err(622): 在 java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 11-14 10:03:02.892: W/System.err(622): 在 java.util.concurrent.FutureTask.run(FutureTask.java:137) 11-14 10:03:02.902: W/System.err(622): 在 android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208) 11-14 10:03:02.912: W/System.err(622): 在 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 11-14 10:03:02.922: W/System.err(622): 在 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 11-14 10:03:02.942: W/System.err(622): at java.lang.Thread.run(Thread.java:856)

谢谢。

Answer 1

你必须使用下面的代码

import org.json.JSONObject;

JSONObject jObject = new JSONObject(response);

其余的你可以用同样的方式处理

Answer 2

从服务器返回的 JSON 是一个 Array 对象，堆栈跟踪清楚地说明了这一点。 尝试使用 org.json.JSONArray 代替 org.json.JSONObject：

org.json.JSONArray jsonArray = new org.json.JSONArray(response);