Android check internet connection [duplicate]

Answer 1

The accepted answer's EDIT shows how to check if something on the internet can be reached. I had to wait too long for an answer when this was not the case (with a wifi that does NOT have an internet connection). Unfortunately InetAddress.getByName does not have a timeout parameter, so the next code works around that:

private boolean internetConnectionAvailable(int timeOut) {
    InetAddress inetAddress = null;
    try {
        Future future = Executors.newSingleThreadExecutor().submit(new Callable() {
            @Override
            public InetAddress call() {
                try {
                    return InetAddress.getByName("google.com");
                } catch (UnknownHostException e) {
                    return null;
                }
            }
        });
        inetAddress = future.get(timeOut, TimeUnit.MILLISECONDS);
        future.cancel(true);
    } catch (InterruptedException e) {
    } catch (ExecutionException e) {
    } catch (TimeoutException e) {
    } 
    return inetAddress!=null && !inetAddress.equals("");
}