我需要向web服务发送一些字符串的http post。我正在使用ksoap。
@Override
protected JSONObject doInBackground(JSONObject... params) {
String result;
HttpParams httpParameters = new BasicHttpParams();
// Set the timeout in milliseconds until a connection is established.
// The default value is zero, that means the timeout is not used.
int timeoutConnection = 30000;
HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
// Set the default socket timeout (SO_TIMEOUT)
// in milliseconds which is the timeout for waiting for data.
int timeoutSocket = 50000;
HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
HttpClient httpclient = new DefaultHttpClient(httpParameters);
setupClient(httpclient);
//HttpURLConnection httpclient = new HttpURLConnection(_url);
Log.d(TAG, "Posting to ["+_url+"]");
HttpPost postdata = new HttpPost(_url);
...set up parameters
ResponseHandler<String> handler = new BasicResponseHandler();
Calendar c = Calendar.getInstance();
long start = c.getTimeInMillis();
try {
Log.d(TAG, "Starting post data call ["+_url+"]");
result = httpclient.execute(postdata,handler);
c = Calendar.getInstance();
long total = c.getTimeInMillis() - start;
Log.d(TAG, "Finished post data call ["+result+"] in ["+total+"] millis");
}catch(HttpResponseException e)
{
c = Calendar.getInstance();
long total = c.getTimeInMillis() - start;
Log.e(TAG, "HttpResponseException: ["+total+"] millis. There was a problem communicating: " + e.getMessage());
return null;
}catch (ClientProtocolException e) {
Log.e(TAG, "ClientProtocolException There was a problem getting to the service: " + e.getMessage());
return null;
} catch(SocketTimeoutException e){
Log.e(TAG, "SocketTimeoutException There was a problem connecting: " + e.getMessage());
return null;
} catch (IOException e) {
Log.e(TAG, "IOException There was a problem reading the data: " + e.getMessage());
return null;
}
catch(Exception e)
{
Log.e(TAG, "Exception An error occurred: " + e.toString());
return null;
}
httpclient.getConnectionManager().shutdown();
JSONObject resp = null;
try {
resp = new JSONObject(result);
} catch (JSONException e) {
resp = null;
e.printStackTrace();
}
Log.i(TAG, result.toString());
return resp;
}
所以当我使用wifi连接时,这个功能很好,但是使用3g在16-18秒内会失败,抛出一个httpresponseexception。
我不敢相信是DefaultHttpClient运行异步才是问题所在,因为这样它也会在WiFi上抛出错误。
编辑
web服务是用c编写的,并使用json响应。
按照这里的要求,logcat在18秒内给出了httpresponseexception,正如我在最初的问题中所说的:
07-22 11:13:04.678: D/ProgressBar(26524): setProgress = 0<br/>
07-22 11:13:04.678: D/ProgressBar(26524): setProgress = 0, fromUser = false<br/>
07-22 11:13:04.678: D/ProgressBar(26524): mProgress = 0mIndeterminate = false, mMin = 0, mMax = 10000<br/>
07-22 11:13:31.968: D/GpsLocation(26524): Got location<br/>
07-22 11:13:32.018: D/WebService(26524): BASE ADDRESS [http://[SERVICEURL]]<br/>
07-22 11:13:32.023: D/ProgressBar(26524): setProgress = 0<br/>
07-22 11:13:32.023: D/ProgressBar(26524): setProgress = 0, fromUser = false<br/>
07-22 11:13:32.023: D/ProgressBar(26524): mProgress = 0mIndeterminate = false, mMin = 0, mMax = 10000<br/>
07-22 11:13:32.048: D/HttpPostWebServiceTask(26524): Posting to [http://[SERVICEURL]/Authentication/Authenticate]<br/>
07-22 11:13:32.053: D/HttpPostWebServiceTask(26524): Starting post data call [http://[SERVICEURL]/Authentication/Authenticate]<br/>
07-22 11:13:47.758: D/dalvikvm(26524): GC_CONCURRENT freed 258K, 17% free 8062K/9671K, paused 22ms+25ms, total 157ms<br/>
**07-22 11:13:50.728: E/HttpPostWebServiceTask(26524): HttpResponseException: [18671] millis. There was a problem communicating: Gateway Timeout**<br/>
07-22 11:13:50.778: D/GOT RESPONSE(26524): NULL RESPONSE FROM SERVER<br/>
07-22 11:13:50.778: E/HttpPostWebServiceTask(26524): Error invoking command: null<br/>
07-22 11:13:50.783: W/System.err(26524): java.lang.NullPointerException<br/>
07-22 11:13:50.793: W/System.err(26524): at com.app.webservices.WebService.checkValidResponse(WebService.java:82)<br/>
07-22 11:13:50.793: W/System.err(26524): at com.app.webservices.WebService.access$0(WebService.java:76)<br/>
07-22 11:13:50.793: W/System.err(26524): at com.app.webservices.WebService$1.execute(WebService.java:120)<br/>
07-22 11:13:50.793: W/System.err(26524): at com.app.webservices.WebService$1.execute(WebService.java:1)<br/>
07-22 11:13:50.793: W/System.err(26524): at com.blm.android.webservice.HttpPostWebServiceTask.onPostExecute(HttpPostWebServiceTask.java:226)<br/>
07-22 11:13:50.793: W/System.err(26524): at com.blm.android.webservice.HttpPostWebServiceTask.onPostExecute(HttpPostWebServiceTask.java:1)<br/>
07-22 11:13:50.798: W/System.err(26524): at android.os.AsyncTask.finish(AsyncTask.java:631)<br/>
07-22 11:13:50.798: W/System.err(26524): at android.os.AsyncTask.access$600(AsyncTask.java:177)<br/>
07-22 11:13:50.803: W/System.err(26524): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)<br/>
07-22 11:13:50.803: W/System.err(26524): at android.os.Handler.dispatchMessage(Handler.java:99)<br/>
07-22 11:13:50.803: W/System.err(26524): at android.os.Looper.loop(Looper.java:137)<br/>
07-22 11:13:50.803: W/System.err(26524): at android.app.ActivityThread.main(ActivityThread.java:4947)<br/>
07-22 11:13:50.803: W/System.err(26524): at java.lang.reflect.Method.invokeNative(Native Method)<br/>
07-22 11:13:50.803: W/System.err(26524): at java.lang.reflect.Method.invoke(Method.java:511)<br/>
07-22 11:13:50.803: W/System.err(26524): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)<br/>
07-22 11:13:50.808: W/System.err(26524): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)<br/>
07-22 11:13:50.808: W/System.err(26524): at dalvik.system.NativeStart.main(Native Method)<br/>
结束编辑
我应该这样做吗:http://www.vogella.com/articles/AndroidNetworking/article.html那么如何使用此方法发布数据实体?
最佳答案
您可以尝试通过手机的网络浏览器连接到服务器,查看问题是否在应用程序中,或者问题是否是解决/连接到服务器地址的3G问题。
我猜你也不能通过网络浏览器连接。
您的web服务托管在哪里?应该从外部网络访问吗?如果服务器位于同一网络中,则可以通过WiFi连接到服务器。