Does anyone know how to programatically detect in Android that wifi is unreachable?
I've got an app running where I am able to easily detect type of network connection and whether is on or not (NetworkInfo class), but I can't detect that wifi is ON, but I am out of reach on the other side of building, so there is no internet. Network info keeps on saying that type of network is WIFI, isConnected = true, getDetailedState = CONNECTED, so these don't help me.
Detect WIFI is connected or on. If wifi is not connected to any INTERNET connection then display message that "WIFI is unreachable or no INTERNET connection."
For checking WIFI is connected use following code.
ConnectivityManager connManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
NetworkInfo mWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if (mWifi.isConnected()) {
// Do whatever
}
Related
I am using this code to check the connection in my app :
ConnectivityManager cm =
(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
boolean isConnected = activeNetwork != null &&
activeNetwork.isConnectedOrConnecting();
this method will return "true" even the device just connect to wifi and not has a connection to the internet or the device turn on mobile network but run out of data. I have read many posts, but most of them are too old. I dont know those answers are still right or not. So, how to check if the device has a "real" connection to the internet ?
This maybe a similar question : Android: Check network and real internet connectivity
I'm trying to check if the device is connected to internet or not. I have the below implementation to do that
public static boolean isConnectedToNetwork(Context context) {
ConnectivityManager connectivityManager =
(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}
NetworkInfo provides two methods isConnected() and isAvailable(). Which one should I use and what is the difference between them.
And is there a way to detect the state where the device is connected to Wifi without an internet connection?
If the device is connected to a network, isConnected returns true.
If the device is not connected but network is available to connect, isAvailable returns true, isConnected returns false.
You can read this topic for find your last question.
Android Check if there is WiFi but no internet
isConnected()
Indicates whether network connectivity exists and it is possible to establish connections and pass data.
- Always call this before attempting to perform data transactions.
isAvailable()
Indicates whether network connectivity is possible. A network is unavailable when a persistent or semi-persistent condition prevents the possibility of connecting to that network. Examples include
- The device is out of the coverage area for any network of this type.
- The device is on a network other than the home network (i.e., roaming), and data roaming has been disabled.
- The device's radio is turned off, e.g., because airplane mode is enabled.
Reference Link
I have a function which check network connections using:
ConnectivityManager cm = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
NetworkInfo[] networkInfos = cm.getAllNetworkInfo();
but, as soon the Wifi network is connected, the mobile network is given as DISCONNECTED
How could I know if both networks are connected?
Thanks in advance for your time.
Try this:
ConnectivityManager cm = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
NetworkInfo wifi = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
NetworkInfo mobileNet = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
if(netInfo!=null){
if(mobileNet.isConnected()){
System.out.println("Mobile Network is connected");
}
if(wifi.isConnected()){
System.out.println("Wi-fi Network is connected");
}
}
How could I know if both networks are connected?
You can create for sure method that will check for both types e.q.
if (networkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
// do your stuff
}
if (networkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
// do your stuff
}
But in Android OS, if Wifi and Mobile network is available (and you can connect to), OS will choose Wifi by default so it'll use Wifi as active network connection.
Android device can have only one connection! (WiFi or Mobile)
If WiFi is available - system will try to connect to it
If WiFi is not available and Mobile is turned on - system will try to connect to Mobile
When system is connected to WiFi - You cant' be shure that Mobile will work until you try to connect.
Same for Moble
I am making an android application. In this application i am receiving data from server. When Wi-Fi is enabled and internet connection is active in our device then it returns the number of record from the server but whenever wifi is enabled but inernet connection is not active or inactive then it gives the force close. I have already checked the wifi connection is enabled.
Please tell me this how can i check that internet is active in our device.
Thanks for advance
Try this code
private boolean isNetworkAvailable()
{
ConnectivityManager connectivityManager
= (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null;
}
One of the major requirments of my application is using cellular internet connection only.
In case of detecting wifi connection, the application have to disable the wifi ability and connecting through the cellualr internet connection.
How it can be done?
Thanks,
Eyal.
Checking WIFI connection
You can use the following code to check if the active network (if any - do some null checks here) is of type WIFI.
ConnectivityManager connManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = connManager.getActiveNetworkInfo();
if (netInfo!=null) {
// detect type using netInfo.getType()
}
There's a TYPE_WIFI int constant in ConnectivityManager that you can use for your check. (getType returns an int to identify the network type).
More info on the Activity Manager can be found on the Android dev site.
Disabling WIFI
n order to disable the WiFi state, you have to grant the following permission in the application manifest
android.permission.CHANGE_WIFI_STATE
You can then use the WifiManager to set enable/disable the WIFI.
WifiManager wifiManager = (WifiManager)getBaseContext().getSystemService(Context.WIFI_SERVICE);
wifiManager.setWifiEnabled(false);
More info on http://developer.android.com/reference/android/net/wifi/WifiManager.html
For a complete sample, check the following post : http://android-er.blogspot.com/2011/01/turn-wifi-onoff-using.html