Udp and Tcp communication for android devices over wifi

Question

1.00/5 (1 vote)

See more:

Hello,
There are ten android devices or more in a room. One of them begins to broadcast his name and IP address to other.
Other devices receive it and send to first device their names and their IP addresses. The first device receives names and IP addresses one by one and sends them a string. This scenario may be loop.
I search a lot and find TCP and UDP protocols for doing it. But UDP is unreliable, speedier, useful for broadcast, and TCP is reliable, slower, useful for unicast.
Now I decide to do first step(broadcast by one of the devices) with UDP, and after detecting IP addresses make TCP communication.
Is that a correct work? Can I do it?
Thanks

Posted 29-Jul-15 17:17pm

suraty

Add a Solution

Comments

[no name] 29-Jul-15 23:55pm

Sure if that is what you want to do, do it. We would have no idea if you are able to do it or not.

suraty 30-Jul-15 0:05am

I am a beginner. I want to know is it principled? There is no easier way? Are my searches complete?

Richard MacCutchan 30-Jul-15 3:52am

Yes that is probably the best way. Send a UDP broadcast and listen for TCP responses. Once you have all the responses then you can communicate with each device via TCP. There are many samples of socket code to be found by Google that will help you. Assuming, that is, that you are already experienced at writing Android applications.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Afzaal Ahmad Zeeshan · Answer 1 · 2015-08-02T06:15:00

You are confusing yourself with TCP (or UDP which is a connectionless protocol, similar to TCP) and network topology, ring in your case maybe.

I would, in this case, suggest that you do not write such a thing. Instead, I would recommend that you create a server for TCP clients and let it communicate with the network. Through your local network, from the router. That server would listen to every message from the clients, client would share their data on the server through network. Then you can generate a response for each of the client.

First step is to get familiar with networking in Java[^]. Android uses Java as official programming language, thus a program written in Java would work fair in Android with a few changes as per Android standards.

In Android, these resources about networking can help you getting started for communicating through WiFi and other mediums for data sharing. http://developer.android.com/training/building-connectivity.html[^]