Android : test if a device can access the internet

Question

In my android app, I would like to test if a user can access the internet. I know I able to test if he is connected to wifi or 3G/4G, etc... but maybe the user is connected to a local network and doesn't have access to the internet.

Should I try a "ping" to google to be sure that he can download anything or does it exist a function which ensure the phone has internet ?

Thanks.

possible duplicate of [Detect if Android device has Internet connection](http://stackoverflow.com/questions/6493517/detect-if-android-device-has-internet-connection) — Nicolas Tyler, Oct 20 '14 at 09:17

score 0 · Accepted Answer · answered Oct 20 '14 at 09:23

If you want to check whether the user has access to internet while s/he has connection, try to reach a web site like google with some timeout.

    URL url = new URL("https://google.com");

    HttpURLConnection urlc = (HttpURLConnection) url.openConnection();
    urlc.setRequestProperty("Connection", "close");
    urlc.setConnectTimeout(1000 * 30);
    urlc.connect();
    if (urlc.getResponseCode() == 200) {
        return true;
    }

If you get timeout or an error code, you can assume your app is not connected to internet.

Okay, this seems to be good. I'll test your code. Thank you very much — psv, Oct 20 '14 at 09:43

score 0 · Answer 2 · edited May 23 '17 at 11:57

0

private boolean isNetworkAvailable() {
ConnectivityManager connectivityManager 
      = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnected();

}

AndroidManifest :

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

But it's already been answered here :

Here

edited May 23 '17 at 11:57

Community

1
1

answered Oct 20 '14 at 09:27

Tsunaze

3,048
7
41
80

See http://stackoverflow.com/questions/12442893/android-networkinfo-always-returns-true-even-if-internet-is-not-available. isConnected() return true even if the user is connected to a local network only. This is the problem I wanna avoid. – psv Oct 20 '14 at 09:42

Android : test if a device can access the internet

2 Answers2