If you can use on emulator, Case 1 : the urls :10.0.2.2 work fine in emulator but not in the device. Case 2 : If it work with wifi and not 3G, check the operator proxy. Case 3: If it work not with wifi and 3G, check your protocole or url.
On Jan 13, 8:00 am, Bob Kerns <r...@acm.org> wrote: > UnknownHostException means your device was unable to get a positive > response to the DNS query trying to look up the hostname. > > It doesn't distinguish between "We couldn't talk to the DNS server", > "we have no network connection right now", "we have never even HEARD > of net work, what's that?", or "we carefully and thoroughly discussed > it with the DNS server, which in turn discussed it with the relevant > authoritative DNS servers, and can conclusively state, that the host > named does not exist at this time". > > What you CAN say, is it never got to the point of actually trying to > talk to that host, because it didn't get enough information to do so. > That is, it is not saying "we've heard of that host, but it doesn't > seem to be there". > > The most likely cause is a temporary failure in your wifi connection, > just as it was trying the DNS lookup. But the DNS server itself could > be to blame, or if it's a DNS server on your site, the connection > upstream, or an upstream DNS server could be to blame. > > I use my local wifi server as a DNS server. It's been giving me > problems like this lately, even on wired connections. Plus, it is not > compatible with IPv6, so I'm going to need to upgrade it soon. I could > configure it to advertise OpenDNS servers instead (which is what it > itself is using), but have slightly longer lookups and no cached data > if the cable connection hiccups. If it's the cable connection that's > at fault, then I'll have these problems anyway. It won't be easy to > track down. > > On Jan 12, 8:44 pm, Ankur Avlani <ankuravl...@gmail.com> wrote: > > > > > > > > > Unfortunately, the server is not local. > > > On Wed, Jan 12, 2011 at 4:15 PM, Dan <king...@gmail.com> wrote: > > > Hello All, > > > > I have had this error both on emulator and a Motorola Droid while > > > using a WIFI connection. I have surrounded the http request with WIFI > > > state checks and before and after WIFI is reported state 3 > > > (WIFI_STATE_ENABLED) and a connection speed of 54 . I have also > > > confirmed, using an adb shell with the emulator, that the emulator > > > cannot ping the website in question giving a domain resolution error. > > > To compare notes with Ankur, is the server on your LAN and the IP used > > > internal? mine is. > > > > I have also tried AndroidHttpClient which does work on the same url. > > > > -Dan > > > > On Jan 12, 12:23 pm, Ankur Avlani <ankuravl...@gmail.com> wrote: > > > > True, I agree with what you say. Its just that I feel, other apps > > > > should > > > > also break or give error. > > > > > Anywayz, Thanks a lot for your inputs. > > > > > regards, > > > > Ankur. > > > > > On Wed, Jan 12, 2011 at 12:17 PM, Brill Pappin <br...@pappin.ca> wrote: > > > > > Well i suppose thats possible if your messing with the network stack, > > > > > but it's pretty low level for Java/Android. > > > > > I guess its also possible that the Android version you have has a > > > > > crappy stack or driver... or you have rooted it and have been messing > > > > > around under the covers so to speak. > > > > > > There is nothing in Android really that would allow you to mess it up > > > > > that badly AFAIK, so I doubt it's your application causing the problem > > > > > if your not specifically getting under the covers. > > > > > > However, the meaning of the exception is clear: > > > > > >http://download.oracle.com/javase/1.4.2/docs/api/java/net/UnknownHost. > > > .. > > > > > and your app doesn't really control the process of translating a > > > > > domain to an ip. > > > > > > - Brill Pappin > > > > > > On Jan 12, 2:54 pm, Ankur Avlani <ankuravl...@gmail.com> wrote: > > > > > > Somehow I have this feeling it is related to my app only. Other > > > > > > apps > > > on > > > > > the > > > > > > phone, I don't see any such issue. Even when browsing on my phone, > > > > > > I > > > > > don't > > > > > > see any error. > > > > > > > On Wed, Jan 12, 2011 at 11:41 AM, Kumar Bibek <coomar....@gmail.com> > > > > > wrote: > > > > > > > By Wi-Fi, I meant, you phone's Wi-Fi could be turning on and off. > > > There > > > > > is > > > > > > > no other reason I can think of. It happens for me as well, > > > sometimes. > > > > > > > > Kumar Bibek > > > > > > >http://techdroid.kbeanie.com > > > > > > >http://www.kbeanie.com > > > > > > > > On Thu, Jan 13, 2011 at 1:10 AM, Ankur Avlani < > > > ankuravl...@gmail.com > > > > > >wrote: > > > > > > > >> I am sorry, that somehow doesn't convince me. I am connected to > > > the > > > > > same > > > > > > >> wifi on my laptop and i never see any web page load error on my > > > > > laptop. > > > > > > > >> On Wed, Jan 12, 2011 at 11:38 AM, Kumar Bibek < > > > coomar....@gmail.com > > > > > >wrote: > > > > > > > >>> Yup, then it's a problem with your Wi-Fi. > > > > > > > >>> Kumar Bibek > > > > > > >>>http://techdroid.kbeanie.com > > > > > > >>>http://www.kbeanie.com > > > > > > > >>> On Thu, Jan 13, 2011 at 1:07 AM, Ankur Avlani < > > > ankuravl...@gmail.com > > > > > >wrote: > > > > > > > >>>> I am connected to network, I am on Wifi. If i try again it > > > works. > > > > > Its > > > > > > >>>> just random. > > > > > > > >>>> On Wed, Jan 12, 2011 at 11:34 AM, Kumar Bibek < > > > coomar....@gmail.com > > > > > >wrote: > > > > > > > >>>>> This error/exception comes because of no network connectivity. > > > > > > > >>>>> Kumar Bibek > > > > > > >>>>>http://techdroid.kbeanie.com > > > > > > >>>>>http://www.kbeanie.com > > > > > > > >>>>> On Thu, Jan 13, 2011 at 1:02 AM, Ankur Avlani < > > > > > ankuravl...@gmail.com>wrote: > > > > > > > >>>>>> Hi All, > > > > > > > >>>>>> I am developing an application on Android. I have seen that > > > at > > > > > times > > > > > > >>>>>> when I try to connect using HttpURLConnection, for getting an > > > > > Image or > > > > > > >>>>>> anydata, I get the following error: > > > > > > > >>>>>> 01-12 11:24:05.073: WARN/System.err(16780): > > > > > > >>>>>> java.net.UnknownHostException: Host is unresolved: > > >www.XXX.com:80. > > > > > > > >>>>>> Note: I get this error on my Motorolla Droid and not in > > > emulator. > > > > > > > >>>>>> Any ideas? > > > > > > > >>>>>> Thanks, > > > > > > >>>>>> Ankur > > > > > > > >>>>>> -- > > > > > > >>>>>> You received this message because you are subscribed to the > > > Google > > > > > > >>>>>> Groups "Android Developers" group. > > > > > > >>>>>> To post to this group, send email to > > > > > > >>>>>> android-developers@googlegroups.com > > > > > > >>>>>> To unsubscribe from this group, send email to > > > > > > >>>>>> android-developers+unsubscr...@googlegroups.com<android-developers%2Bunsubs > > > > > > >>>>>> cr...@googlegroups.com><android-developers%2Bunsubs > > > cr...@googlegroups.com><android-developers%2Bunsubs > > > > > cr...@googlegroups.com> > > > > > > >>>>>> For more options, visit this group at > > > > > > >>>>>>http://groups.google.com/group/android-developers?hl=en > > > > > > > >>>>> -- > > > > > > >>>>> You received this message because you are subscribed to the > > > Google > > > > > > >>>>> Groups "Android Developers" group. > > > > > > >>>>> To post to this group, send email to > > > > > > >>>>> android-developers@googlegroups.com > > > > > > >>>>> To unsubscribe from this group, send email to > > > > > > >>>>> android-developers+unsubscr...@googlegroups.com<android-developers%2Bunsubs > > > > > > >>>>> cr...@googlegroups.com><android-developers%2Bunsubs > > > cr...@googlegroups.com><android-developers%2Bunsubs > > > > > cr...@googlegroups.com> > > > > > > >>>>> For more options, visit this group at > > > > > > >>>>>http://groups.google.com/group/android-developers?hl=en > > > > > > > >>>> -- > > > > > > >>>> You received this message because you are subscribed to the > > > Google > > > > > > >>>> Groups "Android Developers" group. > > > > > > >>>> To post to this group, send email to > > > > > > >>>> android-developers@googlegroups.com > > > > > > >>>> To unsubscribe from this group, send email to > > > > > > >>>> android-developers+unsubscr...@googlegroups.com<android-developers%2Bunsubs > > > > > > >>>> cr...@googlegroups.com><android-developers%2Bunsubs > > > cr...@googlegroups.com><android-developers%2Bunsubs > > > > > cr...@googlegroups.com> > > > > > > >>>> For more options, visit this group at > > > > > > >>>>http://groups.google.com/group/android-developers?hl=en > > > > > > > >>> -- > > > > > > >>> You received this message because you are subscribed to the > > > Google > > > > > > >>> Groups "Android Developers" group. > > > > > > >>> To post to this group, send email to > > > > > android-developers@googlegroups.com > > > > > > >>> To unsubscribe from this group, send email to > > > > > > >>> android-developers+unsubscr...@googlegroups.com<android-developers%2Bunsubs > > > > > > >>> cr...@googlegroups.com><android-developers%2Bunsubs > > > cr...@googlegroups.com><android-developers%2Bunsubs > > > > > cr...@googlegroups.com> > > > > > > >>> For more options, visit this group at > > > > > > >>>http://groups.google.com/group/android-developers?hl=en > > > > > > > >> -- > > > > > > >> You received this message because you are subscribed to the > > > > > > >> Google > > > > > > >> Groups "Android Developers" group. > > > > > > >> To post to this group, send email to > > > > > android-developers@googlegroups.com > > > > > > >> To unsubscribe from this group, send email to > > > > > > >> android-developers+unsubscr...@googlegroups.com<android-developers%2Bunsubs > > > > > > >> cr...@googlegroups.com><android-developers%2Bunsubs > > > cr...@googlegroups.com><android-developers%2Bunsubs > > > > > cr...@googlegroups.com> > > > > > > >> For more options, visit this group at > > > > > > >>http://groups.google.com/group/android-developers?hl=en > > > > > > > > -- > > > > > > > You received this message because you are subscribed to the Google > > > > > > > Groups "Android Developers" group. > > > > > > > To post to this group, send email to > > > > > android-developers@googlegroups.com > > > > > > > To unsubscribe from this group, send email to > > > > > > > android-developers+unsubscr...@googlegroups.com<android-developers%2Bunsubs > > > > > > > cr...@googlegroups.com><android-developers%2Bunsubs > > ... > > read more » -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
