在Android Emulator和Android版本中未找到文件异常<；3

我有下面的代码，我试图调用webservice，以便将数据放到我的android应用程序中

        URL url = new URL(urls[0]);
            Log.i("URL", urls[0].toString());
            String data=AppData.getKeyId();
            System.out.println("http key: "+data);
            URLConnection connection = url.openConnection();
            connection.setRequestProperty("encryptText", data);
            connection.setConnectTimeout(50000);
            connection.setRequestProperty("Cookie", "JSESSIONID=" + Data.getInstance().getSessionId());
            InputStream is = connection.getInputStream();
            System.out.println("Resp Code"+ ((HttpURLConnection) connection).getResponseCode());
            if (((HttpURLConnection) connection).getResponseCode() == 200) return getStringFromInputStream(is);

当我尝试在android emulator和android版本<3.0中运行应用程序时，上面的代码给了我file not found异常，但在版本3和更高版本中运行良好（在3、4.0和4.4中进行了测试）。互联网权限也在android清单中设置。可能的问题是什么

这是我的日志

> 01-16 02:17:51.684: W/System.err(336): java.io.FileNotFoundException:
> http://192.168.1.2:7029/FieldForceAutomation/service/PreSalesResource/Customer/Save?custName=newcustomer
> &custProf=Nil&addrs=avadi road
> &addline1=&addline2=&cityId=2&areaId=2&pincode=000000&resno=0&offno=00000000&mobno=5555555589&emailid=raj@gmail.com&secName=&profWa=&altEmail=None&dcr_no=2001640928&comments=&hasPC=0&serviceProviderId=1&bandwidth=0&status=2&calltypeId=3&custTypeId=1&followUpDate=00210706&createDate=20140116&created_time=02:15:28&chkFeasible=false&userName=sr@act.com
> 01-16 02:17:51.694: W/System.err(336):    at
> org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:521)
> 01-16 02:17:51.704: W/System.err(336):    at
> com.act.Util.HttpReq$Req.doInBackground(HttpReq.java:74) 01-16
> 02:17:51.704: W/System.err(336):  at
> com.act.Util.HttpReq$Req.doInBackground(HttpReq.java:1) 01-16
> 02:17:51.704: W/System.err(336):  at
> android.os.AsyncTask$2.call(AsyncTask.java:185) 01-16 02:17:51.714:
> W/System.err(336):    at
> java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
> 01-16 02:17:51.723: W/System.err(336):    at
> java.util.concurrent.FutureTask.run(FutureTask.java:138) 01-16
> 02:17:51.723: W/System.err(336):  at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
> 01-16 02:17:51.723: W/System.err(336):    at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
> 01-16 02:17:51.733: W/System.err(336):    at
> java.lang.Thread.run(Thread.java:1019) 01-16 02:17:51.814:
> D/AndroidRuntime(336): Shutting down VM 01-16 02:17:51.814:
> W/dalvikvm(336): threadid=1: thread exiting with uncaught exception
> (group=0x40015560) 01-16 02:17:51.844: E/AndroidRuntime(336): FATAL
> EXCEPTION: main 01-16 02:17:51.844: E/AndroidRuntime(336):
> java.lang.NullPointerException 01-16 02:17:51.844:
> E/AndroidRuntime(336):    at
> com.act.PreSalesFormActivity$5$2.onClick(PreSalesFormActivity.java:1394)
> 01-16 02:17:51.844: E/AndroidRuntime(336):    at
> android.view.View.performClick(View.java:2485) 01-16 02:17:51.844:
> E/AndroidRuntime(336):    at
> android.view.View$PerformClick.run(View.java:9080) 01-16 02:17:51.844:
> E/AndroidRuntime(336):    at
> android.os.Handler.handleCallback(Handler.java:587) 01-16
> 02:17:51.844: E/AndroidRuntime(336):  at
> android.os.Handler.dispatchMessage(Handler.java:92) 01-16
> 02:17:51.844: E/AndroidRuntime(336):  at
> android.os.Looper.loop(Looper.java:123) 01-16 02:17:51.844:
> E/AndroidRuntime(336):    at
> android.app.ActivityThread.main(ActivityThread.java:3683) 01-16
> 02:17:51.844: E/AndroidRuntime(336):  at
> java.lang.reflect.Method.invokeNative(Native Method) 01-16
> 02:17:51.844: E/AndroidRuntime(336):  at
> java.lang.reflect.Method.invoke(Method.java:507) 01-16 02:17:51.844:
> E/AndroidRuntime(336):    at
> com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
> 01-16 02:17:51.844: E/AndroidRuntime(336):    at
> com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 01-16
> 02:17:51.844: E/AndroidRuntime(336):  at
> dalvik.system.NativeStart.main(Native Method)

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您收到的http响应代码是什么？您可以尝试读取错误流以查找与http连接相关的可能错误。仅针对信息，将抛出400或更高版本的FileNotFoundException

我解决了这个错误。原来是URL的一些编码问题。非常感谢。