![]() Actually this is a very interesting idea in time of fast mobile internet (I might write more about it in another article). Message API can be used for services discovering via all available interfaces (Wifi, Wifi-direct, Bluetooth 2.0 and LE) and connecting two or more devices via Internet. ![]() Its API consists of two conceptually different APIs: Nearby Messages API and Nearby Connections API. Yet I do have some issues with jmDNS (I got a few crashes inside jmDNS from Crashlytcics, and I have no idea how I can fix it) and it works pretty slow.Īlso Google (not Android open source project) has introduced a new cross-platform library Google Nearby API. ![]() You can use it at any Android API level and this library supports TXT records. It’s an open-source library written in Java 1.6 (this matters for Android developers) and it’s compatible with Apple’s Bonjour. There is no technical reason for this.Īre there any other options? Yes, another option for Android developers is jmDNS library. This feature can be very useful and I don’t understand why it isn’t available in the official SDK. If you need to transmit larger amounts of data, the host should establish a connection with the client and send the data directly. For example, a network game could advertise the name of the map being used in a multiplayer game, and a chat program could advertise the availability of the user (for example, idle, away, or available). The TXT record has the same name as the corresponding SRV record, and can contain a small amount of additional information about the service instance, typically no more than 100–200 bytes at most. That’s what official documentation says about it: One of the most important parts of Bonjour API is ability to share some metadata about a service, also known as TXT records. ![]() This API is available starting from API level 16 (Android 4.1) and works well in general, though it doesn’t cover all Bonjour functionality. Google provides Network Service Discovery API that uses the same technology Apple uses in Mac OS X and iOS (Oh, I’ve forgotten to tell you that Bonjour is open-source). Is there a standard Android API for it? Yes. You print documents via wifi on your printer - Bonjour is here again. You are playing games with your friends via wifi - it’s Bonjour. For example: you try to connect to Chromecast in your living room - it’s Bonjour. Google uses this technology in lots of their projects. What about Android? Can we use this powerful technology in our Android projects? Yes. You can find more information about Bonjour in official documentation. You should understand that Bonjour is only a technology for services discovery, all connection you have to do by yourself anyway. Also applications can discover all available services at any domain. All services are registered in some domain (that’s a mandatory parameter for all services and you can find domain naming conventions here). Any application in your operating system can register a service and assign it to an opened port on your computer (actually Bonjour does not guarantee that a port in service’s metadata is opened and connected to the app that registered this service). A Bonjour term for a device on a network is “service”. In other words, Bonjour is a software component that is used for other devices discovery (PC, Mac, smartphones, printers, etc) in a network via all available interfaces. Bonjour makes it easy to discover, publish, and resolve network services with a sophisticated, yet easy-to-use, programming interface that is accessible from Cocoa, Ruby, Python, and other languages. Bonjour locates devices such as printers, other computers, and the services that those devices offer on a local network using multicast Domain Name System (mDNS) service records.īonjour, also known as zero-configuration networking, enables automatic discovery of devices and services on a local network using industry standard IP protocols. Bonjour is Apple’s implementation of Zero-configuration networking (Zeroconf), a group of technologies that includes service discovery, address assignment, and hostname resolution.
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