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I already knew the basic of android programming. now I want to build a offline multi-user chat application. I found peer-to-peer and Bluetooth are the most used techniques to communicate each other. I need to know,
Which one is easy to begin with among P2P and Bluetooth?
I already built a Bluetooth chat application using online tutorial. That method is a communicating between two endpoints. Is it possible to make it more than two?
Which one is easy to begin with among P2P and Bluetooth?
It depends on your previous skill and expertise. As I have seen that you have already managed to create an application for p2p communication via bluetooth, so of course it is easy to begin with bluetooth.
I already built a Bluetooth chat application using online tutorial.
That method is a communicating between two endpoints. Is it possible
to make it more than two?
Yes, it is possible. There are a lot of tutorials in the internet of connecting multiple bluetooth devices. Please check this SO answer.
However, chat application based on bluetooth is not a good approach. If this for your learning only, then from my point of view this is fine. If this is a professional project, then I would suggest you might consider looking into other options. Check this tutorial which uses Firebase as well. Using firebase for real time chat application will definitely serve your purpose.
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I'm relatively new in mobile development, but I'm really familiar with HTML5. I have a project, wich will be used in pubs, where the customer orders the bar through his cell phone. Some informations:
The bar will have a local server to receive the requests (it will work in local network)
The clients application will have live a chat, so the customers can meet new people in the same bar :). However, the chat server will be online (the customer will need internet to access this functionality)
The application will likely use push notifications and maybe perform some simple background processing.
The application should be Cross Platform.
So what would be the ideal technology to use? Cordova? PhoneGap? Intel XDK? Xamarin? Embarcadero? Should I also use WebSockets?
Thanks!
So phonegap/XDK is really the same a cordova and they're all fantastic. Phonegap and XDK are just... implementations of Cordova. Phone gap can do everything you want it to. I've used phonegap to link multiple phones to a server(and each other) for a grocery deals app.
I would hold off on websockets(though they technically can do what you want). They're not the most maintainable or easiest to set up.
I've explored Xamarin a year ago and it looked like it would work for my(and your) applications. However, it seemed to be completely tied to the .NET framework. So if you don't mind being led by the nose for all you're profits...
I have no direct experience with Embarcadero, but I've now signed up for a trial due to this post.
Sources: 2013-2016 Mobile developer---successful and lucrative project completion
I don't have much idea about all the technologies you asked but I have worked with cordova and accomplished all the requirements for your app. It can be a good option. I'm not very familiar with other tech
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I'm looking for a simple messaging server which I can run on my server which will be used to register clients when they are online so they can "talk" with each other (kind of WhatsApp service but much more lightweight). The clients will be Android and iOS devices so I need a compliant client side as well.
The best solution I came up with is XMPP server but I'm not sure that this is the best choice and I'm not familiar with other possibilities.
What do you think about XMPP: is that the right solution or are there any other options?
ThX!
XMPP is a complete open standard IM protocol with a lot of features implemented besides messaging and presence (via XEP - extensions).
There is a really wide range of opensource servers, clients and libraries as well. So it is relatively easy to develop applications based on XMPP.
Other IM protocols are listed in this complete comparison table:
https://en.wikipedia.org/wiki/Comparison_of_instant_messaging_protocols
So, IMO XMPP is a good choice to implement Android/iOS apps.
XMPP is a good option, especially as many of the features will be already built into the platform.
However, there are many other possible approaches, depending on the actual design and feature list of your platform. You could decide to rely purely on Websockets for example to build channel based group chat. You could even decide to build your own basic protocol if you only plan to have a few features.
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I had IOIO board and went through DIY Samples, like controlling LED, DC motor, Servo motor.. it was very interesting, and I want to design a toy remote car which should be controlled by an android app, There are many android boards available like Hackberry a10, Arduino, Raspberry Pi..etc, as I'm a newbie to hardware domain, I do not know much about boards. So kindly update me on Which one is the best and versatile?, I'm going to use Android studio for the development, not the processing. Is there any other protocols available for transmitting the signals other than BT, IR, and Wi-fi.
You can use Arduino, which provides a wide variety of hardware to connect with. Please go through arduino store . There are many samples available for Arduino. Please refer this may help you to get started.
Best is a tough question, but if you are a hardware newbie, the easiest system to get started with is probably the LittleBits Cloud pack. Once you've prototyped what you need, you can replace it with something more practical in terms of form factor.
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I'm trying to make an application that connects devices over the same WiFi. I'm fairly new to Android development, but I have basic Java knowledge. Now I want to know if my approach is correct?
My approach is as following: I first connect two devices together through WiFiP2P (this part of the code is finished). Next one device creates a SocketServer. That device will send his IP through WiFiP2P to the other device so the devices can now join.
Thanks in advance!
My understanding of WiFiP2P is fairly limited, but I'm assuming that it is trying to be what Bluetooth failed to be.
This approach sounds fine. There is even a page on the offical documentation about it.
My only thought is that you should add protection against malicious users performing spoofing attacks, if that is relevant to your app.
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I have been doing some research to create an IM application. I saw many sample codes and still trying to decide which method to use. Before starting development I want to ask your opinion if anybody knows how popular IM applications such as Kakao Talk, Line, We Chat, WhatsApp work.
I saw some articles saying to use Google Cloud, and some articles about using XMPP.
I am a kinda new for Android development and before starting development I want to see all my possibilities and choose best method for that.
Thanks for your time.
Well, I would presume they don't all work the same way. There are different techniques one can use to implement a chat client. Each of these companies might have their own proprietory technologies depending on their scale, user base, finances etc.
2 popular options you can check out are :
XMPP - It's supported by most major chat clients and is used by the likes of Facebook (a customized version of it anyway). asmack is a popular XMPP library for Android which might be useful to you.
A Backend-As-A-Service (BAAS) provider like Parse. This will save you a lot of server side heavy lifting and writing backend code like you would have to do if you were considering something like AWS
If this is a learning project, I would suggest implementing a very simple client and writing both the server and client-side code so that you know how the whole stack works. Hope that helps!