Detect whether there is an Internet connection available on Android

I need to detect whether the Android device is connected to the
Internet.

The
NetworkInfo class provides a non-static method
isAvailable() that sounds
perfect.

Problem is
that:

NetworkInfo ni = new
            NetworkInfo();
if (!ni.isAvailable()) {
 // do
            something

}

throws
this error:

The constructor NetworkInfo is not
            visible.

Safe bet is
there is another class that returns a NetworkInfo object. But I
don't know
which.

1. How to
   get the above snippet of code to work?


2. How could I have
   found myself the information I needed in the online
   documentation?


3. Can you suggest a better way for this type
   of detection?

class="post-text" itemprop="text">

class="normal">Answer

The
getActiveNetworkInfo() method of
ConnectivityManager returns a
NetworkInfo instance representing the first connected network
interface it can find or null if none of the interfaces are
connected. Checking if this method returns null should be
enough to tell if an internet connection is available or
not.

private boolean
            isNetworkAvailable() {
 ConnectivityManager connectivityManager
            

 = (ConnectivityManager)
            getSystemService(Context.CONNECTIVITY_SERVICE);
 NetworkInfo activeNetworkInfo
            = connectivityManager.getActiveNetworkInfo();
 return activeNetworkInfo !=
            null &&
            activeNetworkInfo.isConnected();
}

You
will also
need:

            android:name="android.permission.ACCESS_NETWORK_STATE"
            />

in
your android
manifest.

Edit:

Note
that having an active network interface doesn't guarantee that a particular networked
service is available. Network issues, server downtime, low signal, captive portals,
content filters and the like can all prevent your app from reaching a server. For
instance you can't tell for sure if your app can reach Twitter until you receive a valid
response from the Twitter service.