How to check internet connection before app starts and while it is running?

Question

I found a lot of answer about this but unable to implement those also. I want to implement this code here but not able to do so.

This code I found on google documentatio

Answer 1

public static boolean isNetworkAvailable(Context context) {
    ConnectivityManager cm = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
    if (activeNetwork != null) {
        if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {
            return true;
        } else if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {
            return true;
        }
    }
    return false;
}