Develop Reference

Why does the IsConnected Android function always return true, even when I turned Wi-Fi off?

I tried to check Internet Connectivity in my App to handle if there is no internet with this code. It always returns true with Wi-Fi type.
ConnectivityManager connMgr = (ConnectivityManager)
getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isConnected()) {
System.out.println( networkInfo.getTypeName());
Loading_News();
}

App crashes when there is no internet [duplicate]

This question already has answers here:
How to check internet access on Android? InetAddress never times out
(64 answers)
Closed 6 years ago.
My app is an rss feed and retrieves data when started and when refreshed but when there is no Internet connection the app crashes. How do I check for Internet connection and display a toast if there isn't any

You can use this function to check if there is internet
public boolean isConnected() {
ConnectivityManager cm =
(ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
return netInfo != null && netInfo.isConnectedOrConnecting();
}
You also need to add this to the manifest file
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
And then just check it
if(isConnected){
//Connected to the internet
}
else{
//Handle error and show toast
}
You can find a more detailed answer here
How to check internet access on Android? InetAddress never times out

To check is decive connected to network.
private boolean isNetworkConnected() {
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
return cm.getActiveNetworkInfo() != null;
}
To check if internet is avalaibe
public boolean isInternetAvailable() {
try {
InetAddress ipAddr = InetAddress.getByName("google.com"); //You can replace it with your name
return !ipAddr.equals("");
} catch (Exception e) {
return false;
}
}

Use this function
private boolean isNetworkConnected() {
ConnectivityManager connectivityManager
= (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}
Check Internet connected or not
if(isNetworkConnected){
}
And add below permission in your manifestfile
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

connMgr.getActiveNetworkInfo() return null while wifi is on

This is my code:
ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Activity.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
but networkInfo is always null..
What can be the cause for this odd thing?

Docs say that getActiveNetworkInfo can return null if there is no default network set. "This may return null when there is no default network."
http://developer.android.com/reference/android/net/ConnectivityManager.html#getActiveNetworkInfo()
A better option might be to check the cell data or wifi connection.
Check your mobile connection.
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo mobNetInfo = connectivityManage.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
Check your wifi connection.
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo wifiNetInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);

Check network connection with LocationManager in Android

I would like to check the network connection with the LocationManager in Android.
My code works fine with Galaxy SII and Version 4.0.3.
But it does not work with Galaxy S and Version 2.3.6.
The code:
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
I am connected to a Wi-Fi network for sure. But the if statement
if (!isGPSEnabled && !isNetworkEnabled)
returns true. Are there known bugs and is there a reliable way to check it?

Try this out:
//If you only want to check your Internet connection available or not
public static boolean isNetworkAvailable(Context context) {
ConnectivityManager connectivityManager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
NetworkInfo wifiInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
return activeNetworkInfo != null && activeNetworkInfo.isConnected();}
Note: wifiInfo provide you status about your Wifi, still it will be there poor connection I think it will good if make HTTP reuest, for more details check link provided.
Edit:
For more information you can [refer this][1].

I am using below code in my every android project.
It will check for any active network that are used for outgoing connection.
public static boolean isNetworkAvailable(Context context)
{
ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = cm.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isConnectedOrConnecting())
return true;
return false;
}

Use this code:
public static boolean checkConn(Context ctx)
{
ConnectivityManager conMgr = (ConnectivityManager)ctx.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo wifiInfo = conMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
NetworkInfo mobileInfo = conMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
NetworkInfo info = conMgr.getActiveNetworkInfo();
if(info != null && info.isConnected()) {
Log.v("NetworkInfo","Connected State");
return true;
}
return false;
}

Android - To check if the phone has a network provider

I have an android app, in that there is a particular requirement where in I need to check if the Android device has a network provider or its just WiFi enabled.
Thank You.

This should do the trick.
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
if(networkInfo != null && networkInfo.isConnected()){
//Your code here
}

final ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
final NetworkInfo networkInfo = cm.getActiveNetworkInfo();
int type = networkInfo.getType();
String typeName = networkInfo.getTypeName();
boolean connected = networkInfo.isConnected()
networkInfo.getType() will return 0 when connected to Mobile
network or 1 when connected trough WIFI.
networkInfo.getTypeName()
will return the strings mobile or WIFI.
networkInfo.isConnected()
will tell you whether or not you have an active connection.

You should take a look at the documentation.
isProviderEnabled(LocationManager.NETWORK_PROVIDER) is what you need