Android sends HTTP requests

Long time no blog, because the company to do Android, the author is also the first contact.

This is a more troublesome problem to be encountered in the project. Record the memo (I just got in touch.) Please advise if there is an incorrect place).

Code to send the request:

Package Com.jiujian.mperdiem;import Java.io.bufferedreader;import Java.io.ioexception;import java.io.InputStream; Import Java.io.inputstreamreader;import Java.net.httpurlconnection;import Java.net.malformedurlexception;import  Java.net.url;public class Apputil {//local test path public static final String Webbaseurl = "HTTP://IP: Port"; /* * Access URL. Gets the result method:get, POST */public static string Loadurlresponse (String method, String urlstring) {HttpURLConnection conn = null;    Connection object InputStream is = null;    StringBuffer result = new StringBuffer ();      try {URL url = new URL (urlstring);//URL Object conn = (httpurlconnection) url.openconnection ();//Use URL to open a link Conn.setdoinput (TRUE); Agree to the input stream, that is, agree to download conn.setdooutput (true); Agree to the output stream, that is, agree to upload conn.setusecaches (false); Do not use buffer Conn.setrequestmethod (method); Use GET request is = Conn.getinputstream (); Gets the input stream.      At this point the link inputstreamreader ISR = new InputStreamReader is really established; BufferedReader Bufferreader = nEW BufferedReader (ISR);      String inputline = "";      while ((Inputline = Bufferreader.readline ()) = null) {result.append (Inputline). Append ("\ n");    }} catch (Malformedurlexception e) {e.printstacktrace ();    } catch (IOException e) {e.printstacktrace ();        } finally {if (is = null) {try {is.close ();        } catch (IOException e) {e.printstacktrace ();      }} if (conn! = null) {conn.disconnect ();  }} return result.tostring (); }}

Calling code:

StringBuffer Sbupdatedevicerefreshinstall = new StringBuffer (Apputil.webbaseurl); Sbupdatedevicerefreshinstall.append ("XXX?
Userid= "); Sbupdatedevicerefreshinstall.append (GetUserId ()); Apputil.loadurlresponse ("POST", sbupdatedevicerefreshinstall.tostring ());

There is no problem with the code, but the app sends the request. The server side has not been printing information.

the error message is: android.os.NetworkOnMainThreadException

Finally found that Android 3.0 is different from the main thread on the Internet access to ask,

Then change the code to:

New Thread () {        @Override public        void Run () {        StringBuffer sbupdatedevicerefreshinstall = new StringBuffer ( Apputil.webbaseurl);        Sbupdatedevicerefreshinstall.append ("XXX? Userid= "<span style=" font-family: ' Microsoft Yahei '; " >);</span>        sbupdatedevicerefreshinstall.append (GetUserId ());        Apputil.loadurlresponse ("POST", sbupdatedevicerefreshinstall.tostring ());        }        }. Start ();

That's fine.

Let's say it's just a touch of Android, it's recommended: The first line of code, this book is good for getting started.

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Android sends HTTP requests