I am new to socket programming i have to use socket.io and node.js to connect with my server host in android so can anyone please just describe me the programming example of how to connect to server in android. And if possible please give some help regarding node.js and socket.io. As i have searched everywhere on google but not able to find out the proper example.
Thanks
You can just have your web service be REST base.
Your Android application can just talk to your web server via REST and receive data json or xml whatever you fancy.
So with node.js you should set up routes.
An example would of a route would be
www.example.com/users via GET post would return a list of users either in JSON/XML
For your android application you need a library, I believe there's a built in one already, to make request for certain routes such as www.example.com/users via GET method and write the logic to expect JSON or XML and parse that.
I just googled this:
Android: https://github.com/koush/ion
As for node.js you just have to build route...
I think is would be better:
websocket api to replace rest api?
It actually invalidate my answers sorry, REST and websocket api are different.
I have no clue what problem exactly you have. But you should break your problems down to small part. And google and search for answer for each smaller part which would make your life easier to google.
Get your webservice up first so that your android software can consume stuff, build a prototype and then build a prototype of android app that consume data from that webservice.
Related
I'm new to android, I'm trying to build an android app that is a front for a web portal. For example, Airbnb. They have a website, but they also have an android app that, using it's own layout, will show listings from their website.
There are many websites that teach how to or even directly convert your website to android apps. However, this will result in an app that loads too slowly and is unresponsive due to CPU usage.
Could anyone share any tutorial/guide to learn how to do this myself?
Million thanks.
To actually load data from a web server you're gonna need and API which usually delivers the proper date using JSON or XML format so that you can properly parse and display that data. Building this API is in it self a complete course on its own.
But connecting to and requesting data from the API is usually done using some networking libraries. These are some of the better know libraries for this purpose.
OkHttp: A complete library with a set of tools for handling network connections and HTTP requests.
RetroFit:Type-safe HTTP client for Android and Java by Square, Inc. which is built on top of OkHttp.
Async-Http-Client:
The Async Http Client library's purpose is to allow Java applications
to easily execute HTTP requests and asynchronously process the HTTP
responses. The library also supports the WebSocket Protocol. The Async
HTTP Client library is simple to use.
There tons of other good libraries.
its called webservices
Through android you get data in form of json from a web server and then return in custom view as you want.
Follow this link hope it will help
Step by Step Method to Access Webservice from Android
you would have to write an API/Web service or use if already exits to fetch data from web server. Basically the concept is that, the website itself must be pulling data from some database, so write an API which would fetch the data from same API and return JSON data and consume the API from your android app.
If you know PHP refere to this for the help :http://www.codeproject.com/Articles/267023/Send-and-receive-json-between-android-and-php
You can write WebService, in programming it generally refers to a web page(ex. Airbnb), that can be called from your android application which can pass in data to it, or receive data from it.
WebService is basically like a 'method' or 'function' in a normal programming language; except you're calling it over the internet.
The first thing is you have to create a Web Service. The Web Service will be your "bridge" to consume the data from other Website like airbnb or others and return the data to your android through json format for example.
You can create a Web Service using many languages like C#, Java, PHP, etc. I would like to recommend you to use the language that you know the most.
You can try to google this
Cheers
I'm new to Android and to web services in general.
This is what i gotta do: My company has a back end website(for the client to monitor the sales) that's used to manage/monitor sales on some stores and it connects to a MySQL db to store data about sales and users(usernames and passwords).
What I want to do is to get data from that database and to add (sync operations) new rows, all of this from my android app.
I googled this many times and it came up with some similar projects but using another languages.
I would like to see some code samples if possible and some how-to theory, what theory should I follow when developing this, how and what ways of communicating between android and python web services and from the web services to the MySQL database.
Thank you in advance.
You will need a working API, that allows you to communicate to the web service from the android application. I would read into how to write an API and how to build a RESTful service using JSON as a way of communicating between server and android app. There are alternatives to JSON, but JSON is better suited for Android than perhaps AJAX and soap is being used less and less. (Can ajax call be done in Android? It can but has limitations)
(I could only post two full hyper links as i don't have enough reputation yet to do so, you may have to remove the spaces)
API:
http://sharismlab.com/blog/2012/07/21/how-to-write-an-api-for-your-web-app/
REST:
www .restapitutorial. com/lessons/whatisrest.html/
JSON:
htt p:// www.r evillweb.co m/article s/why-use-j son/
You may want to check out restjee. It allows you to define and implement RESTful data access APIs without having to write any server side code. Works with just about any database.
im wondering the easiest way to go about this. I've used retrofit for java before to post and get from endpoints in web service my friend wrote in python.. However I've never wrote server side stuff. I have phpmyadmin running on a vitural server... Havnt used it yet however. I just need people to be able to like or dislike a poem they get from the server. Is there anything on the web I could set up like database I can alter from its endpoint? Or am I going to have to learn php and python now? Thanks guys!
To develop a web service is not necessary use php or python. If you are used to programming in Java I recommend you to use Jersey (https://jersey.java.net/) which offers an easy way to define your endpoints. You can also use jackson (http://jackson.codehaus.org/) to process the json info between client and server. Jackson helps you to transform a collection of object form JSON and vice versa.
I've been reading some info about Web Services for Android using SOAP or REST but I've never created a web service so I have many questions about this.
I'm developing an Android App where the users answer some questions and for each user an XML file is generated and saved in the device.
Here are my queries:
What I would like to do is to send these XML files from the devices to the Web Service and also sometimes to retrieve all the files to any
device.
Do I need to convert these files into Byte or just send the XML?
Are these actions possible with the Web Service or will you use Java Sockets? In case you prefer the Web Service, what would you use:
REST, SOAP.
I would appreciate some links to tutorials and piece of advise.
Use SQL Server to manage the data on your desktop and create a web-service in .NET on Visual Studio.
Then connect to the web-service in your application and set/get data from the DB, using web-services. You can use either XML or JSON to transfer your data between the phone and the server.
There is no need for the use of Java Socket API for this.
Links which might be useful :
How to make a web-service in .NET (does not include the implementation in Android) : http://srikanthtechnologies.com/blog/dotnet/wsdaljava.aspx
How to connect your service with Android :
http://seesharpgears.blogspot.in/2010/11/basic-ksoap-android-tutorial.html
http://www.codeproject.com/Articles/304302/Calling-Asp-Net-Webservice-ASMX-From-an-Android-Ap
http://adrianandroid.blogspot.in/2012/05/access-c-net-web-service-in.html
Note: I have never worked on RESTful services. My work has always been on SOAP and hence it remains my preference.
Your final choice of how, exactly, to architect your app, is going to be based on all sorts of things that you haven't included in your questions: your experience, the experience of the other developers in the project, so on and so on.
I will say this, however. REST is deep in the heart of Android. If you decide to go with REST and, possibly, JSON instead of XML (there is, almost certainly, no reason to use byte arrays), you will find that Android's architecture supports you. SOAP and such and you are on your own.
I'm new to Android and web service development!
currently I'm working in developing Android program that will send longitude and latitude information to asp.net website (to show the location change the website map)
the questions are
- how to send this data to the website (the best practice)!
- any suggestions for a suitable framework starting from the android application itself , inserting to database , client/server connection !!
I've read a lot about web services specially REST ..but didn't find tutorials
Appreciate your kind help..
I would suggest that you use JSON to encode your data and this will allow you to use any implementation (pretty much) on a server to receive it. I prefer Java/Servlets but you can most certainly find a JSON library for ASP.net etc. Using something "standard" like JSON allows you more flexibility in the long run than doing something custom.
Have a look at this question for some example code to get started (for lat/long): Passing GPS LonLat from Android GPS to WebPage (javascript)
I also suggest that you use POST instead of GET when using HTTP, there is some example Android code here: http://www.anddev.org/doing_http_post_with_android-t492.html and http://www.androidsnippets.org/snippets/36/
Lastly if you need security and you are using HTTP, simply add an SSL certificate to your server and you will then have HTTPS.