Android :: How To See If WiFi Connected?
Oct 1, 2010
I don't want my user to even try downloading something unless they have WiFi connected. However I can only seem to be able to tell if WiFi is enabled, but they could still have a 3G connection.
android.net.wifi.WifiManager m = (WifiManager) getSystemService(WIFI_SERVICE);
android.net.wifi.SupplicantState s = m.getConnectionInfo().getSupplicantState();
NetworkInfo.DetailedState state = WifiInfo.getDetailedStateOf(s);
if( state != NetworkInfo.DetailedState.CONNECTED ){
return false;
}
However the state is not what I would expect, even though WiFi is connected I am getting OBTAINING_IPADDR as the state.
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Jun 12, 2009
I send files to FTP server in my application. Internet permission is set :
<uses-permission android:name="android.permission.INTERNET"/>
It works quite fine when connected with 3G/3G+. Sometimes, not very often, I get a "SocketException no route to host" or "unknown host" exception when trying to connect. When I'm connected with WIFI, it works sometimes and it's very fast, but the same error occurs very often, and when it has occurred I must restart my WiFi to be able to connect again, even with webbrowser. I use apache commons FTPClient this way:
ftpClient.connect(server, 21); ftpClient.login(user, password);
ftpClient.changeWorkingDirectory(directory); ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
BufferedInputStream buffIn = new BufferedInputStream(new FileInputStream(file));
ftpClient.enterLocalPassiveMode(); ftpClient.storeFile(file.getName(), buffIn); buffIn.close();
ftpClient.logout(); ftpClient.disconnect();
Errors look like this:
06-12 11:17:32.887: ERROR/DictoSyl(3146): No route to host 06-12 11:17:32.887:
ERROR/DictoSyl(3146): java.net.SocketException: No route to host 06-12 11:17:32.887:
ERROR/DictoSyl(3146): at org.apache.harmony.luni.platform.OSNetworkSystem.connectSocketImpl
(Native Method) 06-12 11:17:32.887: ERROR/DictoSyl(3146): at org.apache.harmony.luni.platform.OSNetworkSystem.connect (OSNetworkSystem.java:125) 06-12 11:17:32.887: ERROR/DictoSyl(3146): at org.apache.harmony.luni.net.PlainSocketImpl.connect (PlainSocketImpl.java:227) 06-12
11:17:32.887: ERROR/DictoSyl(3146): at org.apache.harmony.luni.net.PlainSocketImpl.connect (PlainSocketImpl.java:199) 06-12
11:17:32.887: ERROR/DictoSyl(3146): at java.net.Socket.startupSocket(Socket.java:734) 06-12 11:17:32.887: ERROR/DictoSyl(3146): at java.net.Socket.<init> (Socket.java:157) 06-12 11:17:32.887: ERROR/DictoSyl(3146): at org.apache.commons.net.DefaultSocketFactory.createSocket (DefaultSocketFactory.java:53) 06-12
11:17:32.887: ERROR/DictoSyl(3146): at org.apache.commons.net.SocketClient.connect(SocketClient.java:162) 06-12
11:17:32.887: ERROR/DictoSyl(3146): at com.sylpheo.core.android.ftp.FtpManager.start(FtpManager.java:43)
or:
ERROR:
java.net.UnknownHostException: ftpsylpheo.sylpheo.com - ftpsylpheo.sylpheo.com at java.net.InetAddress.lookupHostByName(InetAddress.java:522) at java.net.InetAddress.getByName(InetAddress.java:336) at
java.net.Socket.<init>(Socket.java:155) at org.apache.commons.net.DefaultSocketFactory.createSocket (DefaultSocketFactory.java:53) at org.apache.commons.net.SocketClient.connect(SocketClient.java:162) at com.sylpheo.core.android.ftp.FtpManager.start(FtpManager.java:43)
It looks like having forgot something that makes connection down after several uses of my ftp program, but what? And why does this work quite well (but not always) with 3G/EDGE connection?
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Oct 28, 2009
Is it possible to use the cellular 3G data network while connected to WiFi? I want to create connection through the 3G network while WiFi is also connected.
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Jun 8, 2010
So I connected my wifi to my home network, and I was surprised to not see it with the other systems connected throughout the house. I have really never used my droid wifi, but this was interesting, are cellphone wifi's anonymous?
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Aug 11, 2010
How i can know device is connected to Wifi or 3G, programmatically.
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Aug 19, 2010
I have several remembered WiFi SSIDs on my Droid, including my home WiFi and one for the local library, which are at least 4 miles apart. I just discovered that my Droid is indicating I am connected to the public library WiFi (as shown in my settings screen), when I'm actually connected to my home WiFi. Just to make sure before posting this, I used Network Discovery to confirm that the devices visible to my Droid were the devices on my home WiFi. Other than the incorrect SSID display, the connection seems fine.
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Jun 6, 2010
I just connect my evo with my home network, and it finds network ok and everyting. I even see 4 WiFi signal bars on my evo screen, but no Internet connection. I am using my laptop through that WiFi now without any issue. I am using netgear WGR614 g/bwireless router.
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Feb 14, 2010
I've got this problem with my tattoo. I connected with my router and it says I am connected. But when I try mail, gmail or browser it all doesn't work. It says I am connected but it doesn't work?
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Apr 26, 2012
I am trying to conduct a bit of research before starting to develop an android application I am planning. I want the application to exhibit the following behavior:
If connected to WiFi, send and receive messages to remote server.Else If not connected to WiFi, do not send any messages. Display error message.
I am trying to create an ethical application so users will not be charged when they become disconnected from WiFi without them noticing. Any existing source/documentation on how to do this.
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May 4, 2012
I wanted to give Android a try after having an iPhone for about 4 years now (1st generation iPhone). I decided to go with a used "China" phone - Hero h300 because I didn't want to splurge and find out that Android wasn't for me. So far I do like it but I am running version 2.2.1 (Froyo) and am having an issue with the WiFi connection. I'll initially connect and after a random span of time it will start failing to load pages when browsing or the market will report that there was an error (or lost connection) even though the phone still shows a WiFi connection.
I do not have a data plan and am using WiFi for connection and have setup the phone to use the WiFi instead of Sim data connection. I use WPA/WPA2 PSK security for the wireless network. If I turn off WiFi and turn it back on (on the phone), it will reconnect and work for a while but the problem comes back. So while I "surf" the internet or Market, I have to constantly turn the WiFi on and off.
What can I check or try to resolve this issue? I actually had bought this phone because the iPhone's WiFi was going loopy (it would just scan and scan and scan and never find any networks - even if it was literally sitting next to the wireless router) - so it's kind of ironic that the main problem I have with this phone turns out to be it's WiFi
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Nov 20, 2012
I just flashed to jelly bean 4.1.1 on my verizon GS3. I can't get wifi to stay connected. It continuously rotates between "Authenticating", and "Saved, Secured". Eventually it gives up and just says "Disconnected".
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Jan 16, 2012
I have a Droid X running Gingerbread, and there is one particular WiFi spot that seems to hate me. It's a WiFi router owned by a friend of mine, WPA encrypted. I have the SSID and the password, I can connect to the router. And my network icon turns blue indicating that I have a connection to the Google services. But I can't browse the web, I cannot send/receive email and I cannot use any other app that uses data. Another friend with an iPhone has no problems. My iPod Touch has no problems, but the stuff I want to use is on the Droid.
Two additional kickers to this: My late and unlamented Blackberry had the same problem His router is the same brand (and I think model) as mine and I have zero problems with mine.
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Nov 27, 2012
I live in India. I had purchased a new TP LINK wifi + modem router last week. The modem works great as I access internet using my PC ( ethernet connection broadband) . I tried connecting WIFI using my android, but even when connected I don't get internet on my device.
Here are some screenshots of my modem settings page ( when my android galaxy mini is "connected to wifi, (no internet though))
Status :See my android phone in list of wifi connected clients
And in that WAN tab, why that PVC0 status is down?
In LAN settings photo modem shows my device android connected to modem, but still no internet.
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Oct 11, 2010
Is it possible? I don't seem to be able to do it.
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Aug 29, 2010
Is there a way to fix this? I have WiFi set to never sleep and it is connected. Why is 3G even trying to connect when I am on WiFi. I know 3G trying to find a signal will kill my battery because my signal is really bad at home.
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Jan 25, 2010
I read the other posts about WiFi but mine seems a little different. This just started happening a few days ago. I understand that when the phone goes to sleep it shuts off it's WiFi thats fine although I'd rather it not but eh whatcha gonna do about it. The problem I have is that after it wakes back up it says that it's scanning for networks. I have a lot of WiFi networks in my neighborhood and none of them show up. The work around I've found for this for the time being is to shut the WiFi off and then turn it back on. When I do this it connects back to my WiFi and life goes on.
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Sep 27, 2010
Is anyone having issues with WiFi? I am using a WiFi widget to get connected. It shows connected but there isn't a IP assigned to it? Their on the widget shows 0.0.0.0. Any idea what is happening? I've tried countless times to forget the network and re-connect but still this doesn't work. My wife's on iPhone and hers connect seamlessly. Any idea what could be conflicting my connection? I am using WiFi widget by Robert Burger. It's a nice and simple widget and I don't think that is the problem. For connections, I have to disable the WiFi before I can get online.
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Nov 20, 2010
I recently purchased a GTI-i9000. GPS on it is terrible and I have ready many forums with other users experiencing the same problems. I was thinking, and wanted to clear up a cloudy understanding. On my previous phone (iPhone 3G), when I was not connected to WiFi, I was still able to browse webpages etc, albeit slowly. Is that called GPRS? The form of data?
On my Galaxy, I cannot do this at all. If I am not connected to a WiFi connection, I have 0 internet. I'm just wondering if this is the cause of my dodgy GPS. Is there a setting i need to change or does the SGS not do internet if you're not connected to WiFi. I live in Australia if that helps at all.
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Aug 5, 2010
I got my Vibrant yesterday and hooked it up to my WiFi (netgear g-router). Everything worked great for about 30 seconds. I was able to jump through a few pages and then it stops loading eventually I get a message with something to the effect of "cannot connect to server, please try again later". This is not word for word. I called t-mo support and they were not able to find anything so they are sending me a new Vibrant, but I have a feeling that this problem will persist. I read through different posts and found a few that listed this problem some suggested:
-Download the WiFi Fixer app from the android market
-Switch the router settings from B/G to just G (I don't remember what mine are set to now, but I'll try this out when I get home from work).
If I really have to switch my router settings, what will I do if I'm traveling and have to use a hotel's WiFi hotspot or something? Does anyone have any ideas about this? I have no problems with my WiFi on my MyTouch 3G, so I'm not sure if this is a Samsung issue or an Android issue either way, I either have to figure out a fix or get rid of the phone.
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Aug 17, 2010
I have just upgraded to Android 2.1 on Orange(UK). When I connect to WiFi (home WEP and open), it says I am connected - shows IP address etc., but nothing actually works through the WiFi - can't sync Exchange email, can't download from market, won't even update location on Google Maps. If I switch WiFi off everything works fine over mobile network, but that is unsustainable due to data charges.
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May 28, 2010
I've had my desire for around a month now & had no real problems with it, flashed it with a stock ROM initially & then rooted it a couple of days after the root was released. When I woke up this morning I was connected to my WiFi network but when I tried to load a webpage, nothing happens, it comes up with the stock 'Web page not available' page. I tried a couple of web pages but got the same response, I thought it might be my WiFi network but when I got to work, exactly the same thing happens. I can connect via GPRS when I disable the WiFi with no problem. I've been using Y5 Battery Saver for the past two weeks, not sure if that's relevant. Is this a standard error / known bug, how would I go about fixing this, not having WiFi is obviously a bit of pain!
OK, installed a Terminal emulator over 3G & ran a couple of commands, including dmesg. From the output of dmesg it looks like the WiFi connects but then something goes wrong, here's a brief transcript:
pfn: set ssid = ******
Link event
Link UP
Enter set packet filter
start to add pkt filter 101
wds: 0021 @ 01
qmi: wds: network stopped
rmnet_stop()
wds: 0022 @ ff
qmi: wds: DISCONNECTED
If this is any use, I'm happy to try other commands.
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Sep 16, 2010
I just got my Droid X two days ago and absolutely love it but it is having major wi-fi issues. It will connect, show me in every possible way that is connected but will not let me use the connection, e.g., browse the web, market store or any other type of internet/intranet connectivity. Is there any fix for this? Is it a software issue or hardware issue? Should I wait for the updates from Motorola or should I (and really don't want to) return it for another Droid X? If returning/exchaning it is my only option is there a way to backup all the apps/settings for my phone since I spent a lot of time customizing it already?
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Jun 9, 2010
I am new in Hero. Since some day, after I turn off the mobile network, and switch on the WiFi, I could use mail box, ebuddy, everything, except Browser. But I switch on the mobile network + WiFi at the same time, its work fine for everything included Browser. But after restart my HERO, I can switch on the WiFi without switch on the mobile network and no problem at all, but after using mobile network, problem is coming to me again.
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Sep 16, 2010
Since the update my WiFi will not stay consistently connected to my home network. Sometimes I have to go in and force it to connect. I have deleted my connection and created a new one. Any one else having this problem?
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Mar 28, 2010
I hot major WiFi trouble, connects to belkin n routes for ten seconds then says no connection, after three phones orange says it router, I am well annoyed with the whole situation and orange are saying that view have no other calls or problems with the hero, seems strange as it hot topic here.
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Jun 10, 2010
I have discovered an error in my phone which seems to occur only when connected through 3G (not WIFI).
What happens is the following: I turn/have the phone with 3G on and turn on the youtube app. I click on a movie and the whole phone completely reboots immediately; i.e. I get the whole "HTC quietly brilliant" intro screen and have to enter my PIN again.
I have downloaded a log scanner and ran through the above specified actions (phone rebooted again) and it saved everything that happened according to the log. When wanting to send the log to my e-mail, the phone rebooted immediately again(!). I turned it on again, shut 3G off and went on WIFI. After this I sent the log to my e-mail. No problems. My sister has a Desire as well and has no such problem...
So, now I have this log and was hoping someone would let me send it to him/her and have a look at it to find a clue as to what's wrong.. Maybe I have to bring the phone back or maybe it can be solved in a less troublesome way (read: I can keep this wonderful apparatus with me...!
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Feb 18, 2013
I am able to find and connect to my Wifi Network at home, but internet connection between my new Android Tablet and Wifi is slow. My apple devices connect to the same router and are able to browser fast, the android tablet also browses fast with other Wifi network. There is something between the combination on the tablet and my wifi router that is making the connection slow (the google homepage takes forever to load so does other sites).
Tablet runs Android JellyBeans 4.1 and Wifi is secured using WPA-PSK (tired AES, TKIP and even open connection)
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Mar 1, 2014
Is there an app that I can set to automatically start my VPN app when I connect to unsecured WiFi?
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Apr 28, 2012
I came back home and connected my Galaxy Ace to my home wifi, but this time, it wasn't transferring any data.. It would be connected, full signal, but no internet connection.. My browser, gmail, YouTube, PlayStore, nothing would load.. It'd keep saying Connection Error. Retry. My WiFi works properly on the computer and other devices, and my phone used to work perfectly too.
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Sep 8, 2010
I listen to music at work with some Bluetooth speakers. I also occasionally connect to WiFi while at work. Since the Froyo update if I am connected to both Wifi and Bluetooth while listening to music, the bluetooth will turn itself on and off over and over again. This did not happen to me prior to the Froyo update.I guess my question is, can we not be running and be connected to WiFi and Bluetooth at the same time with Froyo?
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