How I can check android device is connected to the Internet?

Question

Is there any way to find out that android device is connected to the Internet or not. I use this function:

    public boolean isDeviceOnline() {     
        ConnectivityManager cm =
        (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo netInfo = cm.getActiveNetworkInfo();     
        return netInfo != null && netInfo.isConnectedOrConnecting(); 
    }

but this function return true if device connected to a WiFi network that doesn't include internet access or requires browser-based authentication and I want return false in this situation.

"but this function return true if device connected to a WiFi network that doesn't include internet access or requires browser-based authentication and I want return false in this situation" -- then make an Internet request (e.g., HTTP request) of the server that interests you. There is no concept of "connected to the Internet" -- the only thing that you can determine is whether you can contact the server that you want. — CommonsWare, Aug 21 '17 at 13:40

PCGALI ANDROID · Accepted Answer · 2017-08-21T14:08:52.730

try this

public class ConnectionDetector {

private Context _context;

public ConnectionDetector(Context context) {
    this._context = context;
}

public boolean isInternetAvailble() {
    return isConnectingToInternet() || isConnectingToWifi();
}

private boolean isConnectingToInternet() {
    ConnectivityManager connectivity = (ConnectivityManager) _context
            .getSystemService(Context.CONNECTIVITY_SERVICE);
    if (connectivity != null) {
        NetworkInfo[] info = connectivity.getAllNetworkInfo();
        if (info != null)
            for (int i = 0; i < info.length; i++)
                if (info[i].getState() == NetworkInfo.State.CONNECTED) {
                    return true;
                }

    }
    return false;
}

private boolean isConnectingToWifi() {
    ConnectivityManager connManager = (ConnectivityManager) _context
            .getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo mWifi = connManager
            .getNetworkInfo(ConnectivityManager.TYPE_WIFI);
    if (mWifi != null) {
        if (mWifi.getState() == NetworkInfo.State.CONNECTED)
            return true;
    }
    return false;
} }

declare like this

ConnectionDetector ConnectionDetector = new ConnectionDetector(
            context.getApplicationContext());

use like is

ConnectionDetector.isInternetAvailble()

Correct me if I'm wrong, but doesn't this only check if you have a network connection? What if you need to know if that network connection has internet access? Is there a better way that trying to go to some web address? — stackunderflows, Aug 01 '18 at 17:10

score 0 · Answer 2 · answered Aug 21 '17 at 13:17

just try this method >

public boolean isNetworkConnected() {
    ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

    return cm.getActiveNetworkInfo() != null; // return true =(connected),false=(not connected)
}

score 0 · Answer 3 · edited Sep 05 '17 at 11:28

0

Change this:

return netInfo != null && netInfo.isConnectedOrConnecting();

To:

return netInfo != null && netInfo.isConnected();

Then call it like

if(!isDeviceOnline()) {
    System.out.println("Not connected");
}

edited Sep 05 '17 at 11:28

Willi Mentzel

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answered Aug 21 '17 at 13:29

Julfikar

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How I can check android device is connected to the Internet?

3 Answers3

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