Question

I could’t find any helpful tutorials on internet nor the documentation on developers site.

In my application i am connecting to a Web Server using HttpPost, when there is no internet connection, but wifi is on it shows a white screen and after some 10-15 secs “UnknownHostException”.

I caught this Exception and made toast like

Unable to connect, check your internet connection.

and close the Activity (or the Application, since i am using finish() on the 1st Activity).

When the wifi itself is off i get an instant toast like”

You need internet connection to use this Application

but the 1st case is irritating. Taking 10-15 secs time and then showing the toast.

So i used HttpParameters and added a 5 sec ConnectionTimeout parameter.

But the application works same as before(no effect of this parameters).

How can i track if i hit ConnectionTime(5 secs over). So that i can show a Toast like

Slow internet connection

moreover why is the internet connection check not working when wifi is on but no internet

this is what i check when my application is lauched:

cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

if (isOnline(cm, this, SignUpActivity.this)){
//continue
}

public static boolean isOnline(ConnectivityManager cm, Context c, Activity a) {

    NetworkInfo netInfo = cm.getActiveNetworkInfo();
    if (netInfo != null && netInfo.isConnectedOrConnecting()) {
        return true;
    }

    Toast.makeText(c, "You need internet access to run this application",
            Toast.LENGTH_SHORT).show();
    a.finish();
    return false;
}

am i only checking whether device’s wifi is on. if so, how can i check whether i have internet connection, instead of just wifi

Thank You

Answer 1

As for the first question, try using SocketTimeout instead.

As for the second question, the line

NetworkInfo netInfo = cm.getActiveNetworkInfo();

Will only get Wi-fi status (i.e. phone wifi antenna turned on) but not actual connectivity. The function returns immediately, so that if wifi is turned off you can toast out without checking connection further. But when wi-fi is turned on, you should go on and check your server’s actual reachability, with something like

InetAddress.getByName(host).isReachable(timeOut)