本文介绍了在处理Android的服务器响应的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在我的应用程序，我使用webservices.But当服务器已关闭或不活动状态下它给响应code 500和我的应用程序强制关闭读取数据。
In my application I am fetching data using webservices.But when the server is down or not in active state it gives response code 500 and my application force close.
请指导我如何处理这种情况在我的application.The logcat的输出如下所示：
Please guide me how to handle this condition in my application.The logcat output is shown below :
12-05 12:17:22.337: V/response code(950): 500
12-05 12:17:22.347: W/System.err(950): org.json.JSONException: A JSONArray text must start with '[' at character 1 of <html>
12-05 12:17:22.347: W/System.err(950): <head>
12-05 12:17:22.347: W/System.err(950): <title>Configuration Error</title>
12-05 12:17:22.347: W/System.err(950): <style>
12-05 12:17:22.347: W/System.err(950): body {font-family:"Verdana";font-weight:normal;font-size: .7em;color:black;}
12-05 12:17:22.347: W/System.err(950): p {font-family:"Verdana";font-weight:normal;color:black;margin-top: -5px}
12-05 12:17:22.347: W/System.err(950): b {font-family:"Verdana";font-weight:bold;color:black;margin-top: -5px}
12-05 12:17:22.347: W/System.err(950): H1 { font-family:"Verdana";font-weight:normal;font-size:18pt;color:red }
12-05 12:17:22.347: W/System.err(950): H2 { font-family:"Verdana";font-weight:normal;font-size:14pt;color:maroon }
12-05 12:17:22.356: W/System.err(950): pre {font-family:"Lucida Console";font-size: .9em}
12-05 12:17:22.356: W/System.err(950): .marker {font-weight: bold; color: black;text-decoration: none;}
12-05 12:17:22.356: W/System.err(950): .version {color: gray;}
12-05 12:17:22.356: W/System.err(950): .error {margin-bottom: 10px;}
12-05 12:17:22.356: W/System.err(950): .expandable { text-decoration:underline; font-weight:bold; color:navy; cursor:hand; }
12-05 12:17:22.356: W/System.err(950): </style>
12-05 12:17:22.356: W/System.err(950): </head>
12-05 12:17:22.356: W/System.err(950):
12-05 12:17:22.356: W/System.err(950): <body bgcolor="white">
12-05 12:17:22.366: W/System.err(950):
12-05 12:17:22.366: W/System.err(950): <span><H1>Server Error in '/' Application.<hr width=100% size=1 color=silver></H1>
12-05 12:17:22.366: W/System.err(950):
12-05 12:17:22.366: W/System.err(950): <h2> <i>Configuration Error</i> </h2></span>
12-05 12:17:22.366: W/System.err(950):
12-05 12:17:22.366: W/System.err(950): <font face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif ">
12-05 12:17:22.366: W/System.err(950):
12-05 12:17:22.366: W/System.err(950): <b> Description: </b>An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
12-05 12:17:22.377: W/System.err(950): <br><br>
12-05 12:17:22.377: W/System.err(950):
12-05 12:17:22.377: W/System.err(950): <b> Parser Error Message: </b>Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive.<br><br>
12-05 12:17:22.377: W/System.err(950):
12-05 12:17:22.377: W/System.err(950): <b>Source Error:</b> <br><br>
12-05 12:17:22.377: W/System.err(950):
12-05 12:17:22.377: W/System.err(950): <table width=100% bgcolor="#ffffcc">
12-05 12:17:22.377: W/System.err(950): <tr>
12-05 12:17:22.377: W/System.err(950): <td>
12-05 12:17:22.377: W/System.err(950): <code><pre>
12-05 12:17:22.377: W/System.err(950):
12-05 12:17:22.377: W/System.err(950): Line 30: <error statusCode="404" redirect="filenotfound.htm" />
12-05 12:17:22.377: W/System.err(950): Line 31: </customErrors>
12-05 12:17:22.377: W/System.err(950): <font color=red>Line 32: <compilation debug="true" targetFramework="4.0">
12-05 12:17:22.396: W/System.err(950): </font>Line 33: <expressionBuilders>
12-05 12:17:22.396: W/System.err(950): Line 34: <add expressionPrefix="NopResources" type="NopSolutions.NopCommerce.BusinessLogic.Localization.NopResourceExpressionBuilder, Nop.BusinessLogic" /></pre></code>
12-05 12:17:22.396: W/System.err(950):
12-05 12:17:22.396: W/System.err(950): </td>
12-05 12:17:22.396: W/System.err(950): </tr>
12-05 12:17:22.396: W/System.err(950): </table>
12-05 12:17:22.396: W/System.err(950):
12-05 12:17:22.396: W/System.err(950): <br>
12-05 12:17:22.396: W/System.err(950):
12-05 12:17:22.396: W/System.err(950): <b> Source File: </b> C:\Websites\balajeebazaar\web.config<b> Line: </b> 32
12-05 12:17:22.396: W/System.err(950): <br><br>
12-05 12:17:22.396: W/System.err(950):
12-05 12:17:22.396: W/System.err(950): <hr width=100% size=1 color=silver>
12-05 12:17:22.407: W/System.err(950):
12-05 12:17:22.407: W/System.err(950): <b>Version Information:</b> Microsoft .NET Framework Version:2.0.50727.4963; ASP.NET Version:2.0.50727.4955
12-05 12:17:22.407: W/System.err(950):
12-05 12:17:22.407: W/System.err(950): </font>
12-05 12:17:22.407: W/System.err(950):
12-05 12:17:22.416: W/System.err(950): </body>
12-05 12:17:22.416: W/System.err(950): </html>
12-05 12:17:22.416: W/System.err(950): <!--
12-05 12:17:22.416: W/System.err(950): [ConfigurationErrorsException]: Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive. (C:\Websites\balajeebazaar\web.config line 32)
12-05 12:17:22.416: W/System.err(950): at System.Web.HttpRuntime.HostingInit(HostingEnvironmentFlags hostingFlags)
12-05 12:17:22.416: W/System.err(950): [HttpException]: Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive. (C:\Websites\balajeebazaar\web.config line 32)
12-05 12:17:22.416: W/System.err(950): at System.Web.HttpRuntime.FirstRequestInit(HttpContext context)
12-05 12:17:22.416: W/System.err(950): at System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context)
12-05 12:17:22.416: W/System.err(950): at System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context)
12-05 12:17:22.416: W/System.err(950): --><!--
12-05 12:17:22.426: W/System.err(950): This error page might contain sensitive information because ASP.NET is configured to show verbose error messages using <customErrors mode="Off"/>. Consider using <customErrors mode="On"/> or <customErrors mode="RemoteOnly"/> in production environments.-->
12-05 12:17:22.426: W/System.err(950): at org.json.JSONTokener.syntaxError(JSONTokener.java:448)
12-05 12:17:22.426: W/System.err(950): at org.json.JSONArray.<init>(JSONArray.java:104)
12-05 12:17:22.426: W/System.err(950): at org.json.JSONArray.<init>(JSONArray.java:150)
12-05 12:17:22.426: W/System.err(950): at cm.bzaar.CallWebservices.getCategory(CallWebservices.java:48)
12-05 12:17:22.426: W/System.err(950): at cm.bzaar.CategoryActivity$Loader.doInBackground(CategoryActivity.java:98)
12-05 12:17:22.426: W/System.err(950): at cm.bzaar.CategoryActivity$Loader.doInBackground(CategoryActivity.java:1)
12-05 12:17:22.436: W/System.err(950): at android.os.AsyncTask$2.call(AsyncTask.java:185)
12-05 12:17:22.436: W/System.err(950): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:256)
12-05 12:17:22.436: W/System.err(950): at java.util.concurrent.FutureTask.run(FutureTask.java:122)
12-05 12:17:22.436: W/System.err(950): at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:648)
12-05 12:17:22.436: W/System.err(950): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:673)
12-05 12:17:22.436: W/System.err(950): at java.lang.Thread.run(Thread.java:1060)
12-05 12:17:22.436: W/dalvikvm(950): threadid=17: thread exiting with uncaught exception (group=0x4001aa28)
12-05 12:17:22.446: E/AndroidRuntime(950): Uncaught handler: thread AsyncTask #1 exiting due to uncaught exception
12-05 12:17:22.446: E/AndroidRuntime(950): java.lang.RuntimeException: An error occured while executing doInBackground()
12-05 12:17:22.446: E/AndroidRuntime(950): at android.os.AsyncTask$3.done(AsyncTask.java:200)
12-05 12:17:22.446: E/AndroidRuntime(950): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:234)
12-05 12:17:22.446: E/AndroidRuntime(950): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:258)
12-05 12:17:22.446: E/AndroidRuntime(950): at java.util.concurrent.FutureTask.run(FutureTask.java:122)
12-05 12:17:22.446: E/AndroidRuntime(950): at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:648)
12-05 12:17:22.446: E/AndroidRuntime(950): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:673)
12-05 12:17:22.446: E/AndroidRuntime(950): at java.lang.Thread.run(Thread.java:1060)
12-05 12:17:22.446: E/AndroidRuntime(950): Caused by: java.lang.NullPointerException
12-05 12:17:22.446: E/AndroidRuntime(950): at cm.bzaar.CategoryActivity$Loader.doInBackground(CategoryActivity.java:100)
12-05 12:17:22.446: E/AndroidRuntime(950): at cm.bzaar.CategoryActivity$Loader.doInBackground(CategoryActivity.java:1)
12-05 12:17:22.446: E/AndroidRuntime(950): at android.os.AsyncTask$2.call(AsyncTask.java:185)
12-05 12:17:22.446: E/AndroidRuntime(950): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:256)
12-05 12:17:22.446: E/AndroidRuntime(950): ... 4 more
见下code：
code段，其中函数被调用来调用Web服务：
@Override
protected Void doInBackground(Void... arg0) {
CategoryArray = new JSONArray();
CategoryArray = CW
.getCategory("url");
for (int i = 0; i <= CategoryArray.length() - 1; i++) {
try {
Log.v("category array : ", CategoryArray.getString(i));
String[] val = CategoryArray.getString(i).split("•");
CategoryID.add(i, val[0]);
CategoryList.add(i, val[1]);
} catch (JSONException e) {
e.printStackTrace();
}
}
adapter = new CategoryListAdapter(CategoryActivity.this,
CategoryList);
return null;
}
函数来调用Web服务：
public JSONArray getCategory(String URL){
try {
HttpPost request = new HttpPost(URL);
request.setHeader("Accept", "application/json");
request.setHeader("Content-type", "application/json");
// Send request to WCF service
DefaultHttpClient httpClient1 = new DefaultHttpClient();
HttpResponse response = httpClient1.execute(request);
Log.v("response code", response.getStatusLine().getStatusCode()
+ "");
responseCode = response.getStatusLine().getStatusCode();
// if(responseCode > 200){ // HERE I WS TRYING TO BREAK THE CODE AND TRYING TO RETURN NULL BT UNABLE TO DO SO
// CategoryArray = new JSONArray();
// CategoryArray.put(false);
// return null;
// }else{
HttpEntity responseEntity = response.getEntity();
// Read response data into buffer
char[] buffer = new char[(int) responseEntity.getContentLength()];
InputStream stream = responseEntity.getContent();
InputStreamReader reader = new InputStreamReader(stream);
reader.read(buffer);
stream.close();
CategoryArray = new JSONArray(new String(buffer));
Log.v("results length : ", CategoryArray.length() + "");
// }
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return CategoryArray;
}
看到我的反应比较code.手电筒行指导我我如何能打破我的code存在，并显示UA烤面包上的用户界面
see the line where i am comparing response code.Please guide me on how can i break my code there and show u a toast on ui
推荐答案
看到您发布的logcat的，我觉得你是获取一个JSON字符串作为响应。当你得到的回应你想你需要分析它。
After seeing the logcat you have posted, I feel you are fetching a JSON String as a response.When you get the response you want you will need to parse it.
所以，为了你是不是在你的code举行了事后，我帮你继续之后，您可以通过给我的下面的例子中得到您的回复：
So, in order that you are not held up afterwards in your code, I am helping you to continueafter you get your response by giving following example of mine:
在我的一个项目，我得到了从Web服务是响应：
In one of my projects the response I got from the web service was:
{checkrecord：[{rollno：ABC2，百分比：参加40：错过了12：34}]，表1：[]}
为了解析我做了以下内容：
In order to parse I did the following:
JSONObject jsonobject = new JSONObject(result);
JSONArray array = jsonobject.getJSONArray("checkrecord");
int max = array.length();
for (int j = 0; j < max; j++)
{
JSONObject obj = array.getJSONObject(j);
JSONArray names = obj.names();
for (int k = 0; k < names.length(); k++)
{
String name = names.getString(k);
String value= obj.getString(name);
}
我的JSONObject看起来是这样的：
My JSONObject looks like this:
{表1：[]，checkrecord：[{遗漏：34，出席：12，百分比：40，rollno：ABC2}]}
这是什么@gwa试图建议。我只是给了一个code样品给你。首先让您的结果，并确定它是否是有效的。
This is what the @gwa was trying to suggest. I just gave a code sample to you. Get your result first and determine whether it is valid.
希望它可以帮助
干杯
这篇关于在处理Android的服务器响应的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！