Detect USB tethering on android

Question

Is there any way to know (pro grammatically) in your Activity/Application that the user has enabled USB tethering on his phone?

Answer 1

I have found that if I check for usb0 network interface it only has an ip address once tethering has been set up.

public static String getIPAddressUsb(final boolean useIPv4) {
    try {
        final List interfaces = Collections.list(NetworkInterface.getNetworkInterfaces());
        for (final NetworkInterface intf : interfaces) {
            if (intf.getDisplayName().startsWith("usb")) {
                final List addrs = Collections.list(intf.getInetAddresses());
                for (final InetAddress addr : addrs) {
                    final String sAddr = addr.getHostAddress().toUpperCase();
                    final boolean isIPv4 = InetAddressUtils.isIPv4Address(sAddr);
                    if (useIPv4) {
                        if (isIPv4) { return sAddr; }
                    } else {
                        if (!isIPv4) {
                            final int delim = sAddr.indexOf('%');
                            return delim < 0 ? sAddr : sAddr.substring(0, delim);
                        }
                    }
                }
            }
        }
    } catch (final Exception ex) {
        // for now eat exceptions
    }
    return "";
}


boolean isUsbTethered(){
String ipAddr = MipnAndroidApplication.getIPAddressUsb(true);
    if (ipAddr.length() == 0) {
        Log.i(LOG_TAG, "tethering not enabled");
    return false;
    } else {
        Log.i(LOG_TAG, "tethering enabled :)");
    return true;
    }
}