I want to develop an android application which parses json data into some meaningful data sets and accordingly display them into the UI .
I need suggestions on how to go about it.
PS : i have 0 idea of the available options to chose , so different ways to do the same would help me a lot , since i am new to it
Thanks in advance
You can use gson for parsing the data together with some network library like volley or can use retrofit which provide direct parsing with the help of gson and other lib.
To accomplish this you first need to create some relevant Java pojo
For corresponding json dataset , so that you can use it .
You can generate pojo from this website very easily for any json data
http://www.jsonschema2pojo.org/
Related
If there is a Rest-API where I get a very large JSON but I only need a few fields of it, for example only the first block in it, do I need to manually create kotlin data classes for ALL the fields in the JSON to be able to parse work with json data? What's the current best practice of handling such a case?
I need to get some simple data (actual currency values) to my android application. I'm not sure what is the best way to achieve it. Do I have to make some database and put it on server and than update it manually or there is some better way?
You can use an API Service and access to this service from you android device. You donot need to do a server implementation for this.
e.g. for exchange rates check https://openexchangerates.org/
Yes.
Please make a server and a PHP which going to print out the values in JSON. You can validate your json with http://jsonlint.com/. After it you can download and parse the json with yourself or a 3rd part library (like retrofit).
You can use this website to generate POJO, so retrofit can parse the json for you by it`s own.
http://www.jsonschema2pojo.org/
select: JSON instead of scheme and select GSON instead of JSON, if you are using retrofit.
sources:
https://en.wikipedia.org/wiki/Gson
https://github.com/square/retrofit
http://blog.robinchutaux.com/blog/a-smart-way-to-use-retrofit/
I just started using the website http://www.kimonolabs.com and created an API as I need to retrieve data from my school website to put into the school app I am creating. Unfortunately, I do not really plan ahead, and this leads me to my 2 questions:
1) How do I include this API in my school Android App?
2) How do I parse the JSON in this API? (Or just linking me to another page on this would be equally as greatly appreciated :) )
Thanks very much for any help you can give! Sorry for my language, I am 14 :P
First things first. Take a look at AsyncTask in Android. AsyncTask is used to perform operations asynchronously. Take a look at this answer explaining how parameters are passed to AsyncTask.
You can use libraries mentioned bellow to do same thing:
Asynchronous Http Client
Volley
Once you communicate with server and receive response, you have to parse JSON data.
The key you have to remember for this is
[] - square bracket represents JSON Array
{} - curly bracket represents JSON Object
Everything else will be combination of these.
This tutorial will help you regarding JSON parsing.
JSON object to Java object conversion
To convert json data to java object you can use:
Jackson
Gson
Follow this link or this link for nice GSON tutorial.
I personally used GSON, and it is best library for json to java object conversion.
I have a .net webApi project that contains some methods.
The methods send and get complex objects.
My android application gets the objects in json format and parsing them manually.
In any changes of the objects in the WebApi project I have to change manually the android application project.
I would like to know what is the best practice to work with android application client and .Net WebApi.
There is any tool to connect between them or to auto map the objects?
Please help me
Tal
U do use json parsing technique for parsing the json responses.its proper way of data parsing there is i think no tool for auto mapping.
From the Android Client end you have to use Spring RestTemplate together with Data Transfer Objects (DTOs). You wouldn't need to manually manipulate a JSON String values. It's all about dealing with Java Objects then. You can directly pass the Objects to the RestTemplate as Entity classes and get the JSON String Auto Mapped to your DTOs.
I am writing a android application to read a php script in my LAMP server which display the data inside mysql database. The php script simply fetches all rows inside my database table.
I would like to ask if there is any method to parse the information of the php script and set the textview inside the application with the information fetched.
Should my php script echo the data in text, array or JSON format?
What methods or direction should I follow to fetch and parse the data into my android application?
Thanks
I think that JSON is the best format to use, as there are good JSON libraries around .
If you use a JSON library such as Gson or Jackson you can have the library map the JSON recieved from your php script to a Java domain class. So the library will parse the JSON and create an instance of your Java class for you.
Then it is easy to fill your textview with the values from your java object.
The above answer gives the details about what you may do in your app to parse the JSON data . I would like to add more details regarding how you can create the JSON object inside your php files . You may use the json_encode php function to convert the data that you get from your database into a JSON format .
PHP json_encode official documentation with exampes