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Android Build a Weather App (2015) Concurrency and Error Handling What To Do When the Network is Down

Posted by yadin michaeli
yadin michaeli
Courses Plus Student 5,423 Points

Can sombody explain me this line of code??

Hello.

I dont get this method can somebody explain it to me please im really confused help please!

    private boolean isNetworkAvailable() {
        ConnectivityManager manager = (ConnectivityManager)
                getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = manager.getActiveNetworkInfo();
        boolean isAvailable = false;
        if (networkInfo != null && networkInfo.isConnected()) {
            isAvailable = true;
        }

        return isAvailable;
    }

2 Answers

Ben Deitch
STAFF
Ben Deitch
Treehouse Teacher
Ben Deitch
Ben Deitch
Treehouse Teacher

Hey Yadin! In Android the NetworkInfo object gives us information about the network the device is currently connected to. So we start off by using the ConnectivityManager to get the current NetworkInfo. Then we check to make sure that the NetworkInfo actually exists (isn't null), and that it 'isConnected()', and if it is we set 'isAvailable' to true. At the end we just return whether or not the network was available. Hope that helps!

yadin michaeli
yadin michaeli
Courses Plus Student 5,423 Points

Hello Ben thanks for the answer! just 1 more question...what the purpose of this ConnectivityManager please?

Ben Deitch
Ben Deitch
Treehouse Teacher
Ben Deitch
Ben Deitch
Treehouse Teacher

The ConnectivityManager just contains a ton of information about the state of the device's network connection. It's just what we have to use to get access to the NetworkInfo object.

yadin michaeli
PLUS
yadin michaeli
Courses Plus Student 5,423 Points
yadin michaeli
yadin michaeli
Courses Plus Student 5,423 Points

Oh ok thank you very much! :)