【发布时间】:2013-01-01 11:03:25
【问题描述】:
我收到错误转换结果java.io.IOException Attempted read on closed stream的错误,这是什么问题??
我的 JSONParsing 类如下:
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
// function get json from url
// by making HTTP POST or GET method
public static JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method.equals("POST")){
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
String url1 = "http://192.168.0.29/evisiting_records/read_mytask.php?cid=1";
HttpPost httpPost = new HttpPost(url1);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}else if(method.equals("GET")){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
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();
json = sb.toString();
Log.v("json from server ::",json);
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
请指导。如何解决?
【问题讨论】:
-
为什么静态变量可以是局部变量?为什么您只通过记录它们然后继续处理所有异常,就好像一切都很好?您当前的问题异常发生在哪里?
-
b/c 我正在向我的 EditText 框发送请求,该框只能从中检索数据,并且不能使用非静态 JSONObject。 cus_name_txtbx.setText(my_task.getString(TAG_NAME));因为 my_task 是 JSONObject
-
看起来你尝试做一些这里讨论的事情:stackoverflow.com/questions/2043580/…
-
@Android:我认为您误解了静态变量的工作原理......以及如何使用异常。
-
哪行代码抛出异常?当您将静态变量设为本地时会发生什么?如果方法既不是 GET 也不是 POST 会发生什么?
标签: java php android mysql json