Android: Get a List of Local Address in Device

This code snippet basically collects an array of Local Addresses (Inet4Address).

We use instaceof Inet4Address to avoid duplicates with IPv4 ang IPv6.

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public static Inet4Address[] getLocalAddrasses(ConnectivityManager connManager) throws SocketException { ArrayList<Inet4Address> results = new ArrayList<Inet4Address>(1); Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces(); while (interfaces.hasMoreElements()) { NetworkInterface iface = interfaces.nextElement(); if (!iface.isUp() || iface.isLoopback() || !iface.supportsMulticast()) { continue; } Enumeration<InetAddress> addresses = iface.getInetAddresses(); while (addresses.hasMoreElements()) { InetAddress addr = addresses.nextElement(); if (addr instanceof Inet4Address) { results.add((Inet4Address) addr); } } } return results.toArray(new Inet4Address[results.size()]); }

Android: Restrict taking screenshots!

Somehow you wanted to block taking a snapshot on a certain application to disallow users share critical information(s).

I've seen this feature in some Online Banking and Finance apps. I got a little curious about it. So here is a simple code snippet;

1	getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);

Note: Make sure you call this before the setContentView inside onCreate.