JSONException：字符 0 处的输入结束
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【中文标题】JSONException：字符 0 处的输入结束【英文标题】：JSONException: End of input at character 0 【发布时间】：2014-08-09 16:36:05 【问题描述】：我正在尝试从服务器获取 JSON 值。我不知道我的代码有什么问题。我正在使用AsyncTask，这是我在doInBackground中的代码
代码：
@Override
protected Void doInBackground(List<String>... articlesRec)
for (List<String> articlesPostValue : articlesRec)
event = articlesPostValue.get(0);
category = articlesPostValue.get(1);
paged = articlesPostValue.get(2);
deviceID = articlesPostValue.get(3);
List<NameValuePair> articlesPostValues = new ArrayList<NameValuePair>();
articlesPostValues.add(new BasicNameValuePair("_event", event));
articlesPostValues.add(new BasicNameValuePair("cat", category));
articlesPostValues.add(new BasicNameValuePair("paged", paged));
articlesPostValues.add(new BasicNameValuePair("_deviceID", deviceID));
HttpClient hc = new DefaultHttpClient();
HttpPost hp = new HttpPost(AutoLifeConstants.BASE_URL);
try
hp.setEntity(new UrlEncodedFormEntity(articlesPostValues));
// Execute HTTP Post Request
HttpResponse response = hc.execute(hp);
String result = EntityUtils.toString(response.getEntity());
String jsontext = new String(result);
JSONObject entries = new JSONObject(jsontext);
this.response = entries.getString("response_code");
try
String totalPageStr = entries.getString("total_pages");
totalPage = Integer.valueOf(totalPageStr);
catch (Exception e)
JSONArray postListArray = entries.getJSONArray("posts_list");
for (int i = 0; i < postListArray.length(); i++)
JSONObject postListObj = postListArray.getJSONObject(i);
String articlesTitle = postListObj.getString("title");
String dateTime = postListObj.getString("date");
String articlesImage = postListObj.getString("feature_image");
String descrition = postListObj.getString("content");
String fullDescription = postListObj.getString("full_content");
articlesNewesttitle.add(articlesTitle);
articlesNewestPostTime.add(dateTime);
articlesNewestPostImage.add(articlesImage);
articlesNewestPostDescription.add(descrition);
postFullDescription.add(fullDescription);
Log.d("Title",articlesTitle);
catch (Exception e)
Log.e("catched error","Exceptin occured");
e.printStackTrace();
return null;
这里是 logcat 上的catch(Exception e)
06-19 13:22:32.229: W/System.err(19647): org.json.JSONException: End of input at character 0 of
06-19 13:22:32.264: W/System.err(19647): at org.json.JSONTokener.syntaxError(JSONTokener.java:450)
06-19 13:22:32.265: W/System.err(19647): at org.json.JSONTokener.nextValue(JSONTokener.java:97)
06-19 13:22:32.268: W/System.err(19647): at org.json.JSONObject.<init>(JSONObject.java:154)
06-19 13:22:32.269: W/System.err(19647): at org.json.JSONObject.<init>(JSONObject.java:171)
06-19 13:22:32.270: W/System.err(19647): at np.com.autolife.adapters.NewsActivity$Get_postlist.doInBackground(NewsActivity.java:169)
06-19 13:22:32.272: W/System.err(19647): at np.com.autolife.adapters.NewsActivity$Get_postlist.doInBackground(NewsActivity.java:1)
06-19 13:22:32.272: W/System.err(19647): at android.os.AsyncTask$2.call(AsyncTask.java:287)
06-19 13:22:32.273: W/System.err(19647): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
06-19 13:22:32.273: W/System.err(19647): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
06-19 13:22:32.274: W/System.err(19647): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
06-19 13:22:32.274: W/System.err(19647): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
06-19 13:22:32.281: W/System.err(19647): at java.lang.Thread.run(Thread.java:838)
这里是JSON格式
"get": [],
"post":
"_event": "get_posts",
"_deviceID": "490154203237518",
"cat": "2",
"paged": "1"
,
"response_code": "success",
"posts_total": 8,
"total_pages": 2,
"paged": 1,
"posts_list": [
"ID": 9168,
"title": "MAXXIS Introduce Trepador Tires",
"content": "",
"full_content": "http:xxxxxx",
"date": "June 13, 2014",
"category": "All News & Events, Local News",
"feature_image": "http:xxxxx.jpg",
"feature_image_thumb": "http:xxxx.jpg",
"author": "AutoLife Team"
,
"ID": 9162,
"title": "5 Year Warranty On All Hero Motorcycles",
"content": "",
"full_content": "http://xxxxx",
"date": "June 13, 2014",
"category": "All News & Events, Local News",
"feature_image": "http://xxxxxx.jpg",
"feature_image_thumb": "http://xxxx.jpg",
"author": "AutoLife Team"
,
"ID": 8130,
"title": "All new 11th Generation Toyota Corolla Launched",
"content": "",
"full_content": "http://xxxxxx",
"date": "May 1, 2014",
"category": "Events & Schemes",
"feature_image": "http://xxxxxx.png",
"feature_image_thumb": "http://xxxxxx.png",
"author": "supervisor"
,
"ID": 9178,
"title": "New Launches From TATA Motors : TATA Nano Twist",
"content": "",
"full_content": "http://xxxxxx",
"date": "February 15, 2014",
"category": "All News & Events, International News",
"feature_image": "http://xxxxx.jpg",
"feature_image_thumb": "xxxxxxx.jpg",
"author": "AutoLife Team"
,
"ID": 9175,
"title": "New Launches From TATA Motors : Revotron Engine",
"content": "",
"full_content": "xxxxxxx",
"date": "February 15, 2014",
"category": "All News & Events, International News",
"feature_image": "http://xxxxx.jpg",
"feature_image_thumb": "http://xxxxx.jpg",
"author": "AutoLife Team"
]
【问题讨论】：
我已经更新了添加 JSON 的问题 第 169 行是什么？ 这不是问题，但你为什么要这样做：String jsontext = new String(result);
@user3751280 检查 jsontext 是否有一些值。
@GiruBhai 第 169 行是 ' JSONObject 条目 = new JSONObject(jsontext); ' .
【参考方案1】：
您收到此错误的原因是您尝试多次访问响应。例如，假设您对响应进行日志记录，然后使用相同的响应对象创建一个 json 对象，它会触发一次 acees 错误。
【讨论】：
【参考方案2】：您可能会收到空白回复。它不为空，但 jsontext 为空。所以你得到这个错误而不是 Nullpointer 异常
您是否向服务器发送了正确的参数。还要检查 url 是否响应 POST 请求。
【讨论】：
这将是令人难以置信的，因为 OP 正在发布人们认为的响应。 @user3751280 使用 GET 实现它 @GiruBhai 我有同样的问题..我正在发送正确的参数但收到错误【参考方案3】：在处理 JSON 之前检查响应是否为空：
if (response.success())
if (response.getData() == null)
return null;
else if (response.getData().length() <= 0)
return null;
try
// Logic
【讨论】：
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