connectivity

Check the Internet Connectivity in Android

江枫思渺然 提交于 2019-12-01 14:56:53
I am trying to pull as well as push some data to and from the server via webservice. The mandatory thing that should i have to do is connectivity check. What i have done right now is , i have written a connectivity check code in each activity before it pushes/ pulls the result set from the server. I know its not a best way that i should have to code. Instead this connectivity check should be running some thing like a background , (behind the screens) and alerts the user, when the WIFI / 3G becomes low / goes down. What is the best way to do so ? Please let me know know your thoughts. Thank you

Check the Internet Connectivity in Android

你离开我真会死。 提交于 2019-12-01 13:26:41
问题 I am trying to pull as well as push some data to and from the server via webservice. The mandatory thing that should i have to do is connectivity check. What i have done right now is , i have written a connectivity check code in each activity before it pushes/ pulls the result set from the server. I know its not a best way that i should have to code. Instead this connectivity check should be running some thing like a background , (behind the screens) and alerts the user, when the WIFI / 3G

Android regular check for internet connection

天大地大妈咪最大 提交于 2019-12-01 09:21:28
问题 I'm running an android app that displays a webview on specific URL, I want to check if the application server I'm accessing is alive and that I can view HTML, if failed I should terminate the webview, this check should be every 10 seconds (or whatever), what is the best approach for this ? 回答1: Create Timer (here you have information) and when timer tick, ping any host : URL url = new URL("http://microsoft.com"); HttpURLConnection urlc = (HttpURLConnection) url.openConnection(); urlc

Capturing network status change event

若如初见. 提交于 2019-12-01 09:13:49
I am trying to get events when the internet connection is reestablished after it is lost. It is for a data transfer software that I am developing. If I lose the network during data transfer, I would like to be notified when it is back and continue the transfer automatically. I can of course create a separate thread and check the network once in a while with a timer, but maybe there is a better option out there. I am developing for windows mainly, in C++ (not .net). I can also use wxwidgets (I use it for GUI) but I doubt it offers any related functionality. You might want to check out the

Android Bluetooth Serial RFCOMM low baud rate / slow transmission

北城以北 提交于 2019-11-30 06:51:14
问题 I'm working on an Android Bluetooth project to send and receive data from a custom made hardware. I used Bluetooth Chat Sample in SDK as basis. I realized that there is no way to change baud rate on Client (Android phone) and baud rate will depend on hardware. I tried setting different baud rates on hardware and none met our expectations; Fastest i can get is 91Kbps (when baud rate is set to 2.7Mbps ~ 910Kbps). Using minimum baud rate (115Kbps) i get 43Kbps. I tried using different phones and

BroadcastReceiver for CONNECTIVITY_ACTION always returns null in intent.getExtras()

删除回忆录丶 提交于 2019-11-30 04:09:46
Im trying to receive BroadcastMessages from CONNECTIVITY_ACTION: // register BroadcastReceiver on network state changes final IntentFilter mIFNetwork = new IntentFilter(); mIFNetwork.addAction(android.net.ConnectivityManager.CONNECTIVITY_ACTION); //"android.net.conn.CONNECTIVITY_CHANGE" registerReceiver(mIRNetwork, mIFNetwork); and receiver is: private BroadcastReceiver mIRNetwork = new BroadcastReceiver() { @Override public void onReceive(final Context context, final Intent intent) { android.util.Log.i(TAG,"mIRNetwork: Network State Received: "+intent.getAction()); Bundle extras = intent

How to connect to outside world from amazon vpc?

佐手、 提交于 2019-11-29 18:43:05
I have amazon VPC set through wizard as "public only network", so all my instances are in public subnet. Instances within VPC that have Elastic IP assigned connect to internet without any troubles. But instances without elastic IP can't connect anywhere. Internet gateway is present. Route table in aws console looks like Destination Target 10.0.0.0/16 local 0.0.0.0/0 igw-nnnnn and route from inside instance shows Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.0.0.0 * 255.255.255.0 U 0 0 0 eth0 default 10.0.0.1 0.0.0.0 UG 100 0 0 eth0 I tried to open ALL

How to protect ZeroMQ Request Reply pattern against potential drops of messages?

放肆的年华 提交于 2019-11-29 10:58:20
I'm trying to implement a ZeroMQ pattern on the TCP layer between a c# application and distributed python servers. I've gotten a version working with the request-reply REQ/REP pattern and it seems relatively stable when testing on localhost . However, in testing, I've debugged a few situations, where I accidently send multiple requests before receiving a reply which apparently is not acceptable. In practice the network will likely have lots of dropped packets and I suspect that I'll be dropping lots of replies and/or unable to send requests. 1) Is there a way to reset the connection between

Programmatically check whether my machine has internet access or not

风格不统一 提交于 2019-11-29 09:24:25
How can I programmatically check whether my machine has internet access or not using C/C++, is it just a matter of pinging an IP? How does NIC do it ? I mean something like: I am using Windows 7. Nayana Adassuriya If you work on Windows, just try this #include <iostream> #include <windows.h> #include <wininet.h> using namespace std; int main(){ if(InternetCheckConnection(L"http://www.google.com",FLAG_ICC_FORCE_CONNECTION,0)) { cout << "connected to internet"; } return 0; } Kiran There is nothing of that sort I think, but you can try this: The easiest way is to try to connect to a known outside

Android emulator no internet connectivity

╄→гoц情女王★ 提交于 2019-11-29 08:56:16
I'm running under windows xp sp3 and i have no firewall, no proxy, my internet connection works perfectly but android emulator have no connection (browser and app), i've tried some solutions like this one but infortunately not work. For information, my emulator used to work and this problem occurs suddenly.. Please help with this. Thanks Start your from command prompt prompt like your_path_of_android_sdk\tools\emulator -avd <AVD Name> -dns-server 8.8.8.8 I think this will help you out as a temporary solution. try to go to Settings > Wireless & Networks > Enable Wifi (if you get an error,