httpurlconnection - Android responseCode 400 if Android-version lower than 4 -

somebody knows why responsecode 400 on android 2.x ? in android 4.x works , server returns 200.

        url url = new url(url_in);         uri uri = new uri(url.getprotocol(), url.getuserinfo(), url.gethost(), url.getport(), url.getpath(), url.getquery(), url.getref());         url = uri.tourl();         httpurlconnection c = (httpurlconnection) url.openconnection();         c.setrequestmethod("get");         c.setrequestproperty("accept-encoding", "identity");         c.setrequestproperty("accept-charset", "utf-8");         c.setrequestproperty("content-type", "text/html");          c.setconnecttimeout(timeout);         c.setreadtimeout(timeout);         c.connect();         int status = c.getresponsecode(); 

where difference?

ok found post.

and this..

topic: avoiding bugs in earlier releases