Android Internet Connection checking

private boolean isNetworkConnected() 

{

ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo ni = cm.getActiveNetworkInfo();
if (ni == null) 

{
       //There are no active networks.       return false;
} 

else
{

        return true;
}

}

The above function will return true only if the device has internet connection otherwise false.

manifest file permissions,

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />