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Android application which can parse json recieved from server into meaningful datasets

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/

How to get some simple data by Internet in Android

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/

Android - Retrieve data from server database through web service (JSON v/s Servlet)

I need to retrieve huge amounts of data from a database through a web service from an Android app. I have two different ways to do this, and I wanted some advice on it:
1. The first option is to create a .php file on the server side that managed any POST coming from the client (Android app). The server would then create a JSON response. Finally we would parse this response using a JSON parser in Android. This is also known as the REST scheme.
2. The second option is to create a SERVLET, execute it from the client (Android), have the servlet send the request to the database for us, and finally parse that data from Android. Obviously the servlet would be written so that it could easily interact with the database.
Points to note (so as to decide which option is better):
1. I won't be storing anything in the database from the client. That is, my Android app is read-only.
2. I will be reading from a huge database, so it is a priority here the performance of the Client-Server interaction, with a special mention for data parsing and for servlet vs php performance.
Any help would be greatly appreciated.

Android has built-in support for parsing JSON data with the use of JSONObjects and JSONArrays, so it would be a lot easier to handle data in that form, rather than handling servlets. Its even possible to directly receive the web service response as a JSONObject or JSONArray.
In general, web services in Android should be of the RESTful type. That's how Google seems to prefer it. That's why there's built-in support for JSON, but not for SOA or Servlets.
References:
1. Reasons for not directly write Servlets for creating a REST API.
2. Servlet vs REST.

What are the limitations of ksoap2 library?

I want to send data to the server using asp web service from my Android application. For this I'm using ksoap2 library. The data I'm sending is in the form of an Content object. The structure of Content class is:
class Content{
int contentId;
string xmlContent;
}
The xmlContent is big, 1k to 100k lines. My question is, using ksoap2 library is recommended for this type of operations? Is there any limitations of ksoap2 library?

I have also used the Ksop in my program.But i never faced such difficulty it can't be overcome. I have one suggestion to you to use JSON rather than xmlContent. There is a inbuilt java serialization in asp. Just use that and you will get a json response inside you android.Just parse the json using ksop. Here you will get a good idea about ksop.

Get Json Information? (Noob)

I'm new to both using json and developing for android, however I'm looking to learn how to retrieve information using a json api key.
Let's say this website has all the information I need. How can I access and store that information?
https://website.com/api/user/key/a015b92aec875bd24e8fdc73477bfdcr
For example it would have something like this,
{"balance":"123","due":"3426"}

To access it, you need to open HTTPS connection to the server that has that API key, which is that https address you just provided. The server will return the JSON objects for you, to parse the string data, you can use GSON. GSON will translate all the JSON objects into Java objects, and it will help you populate your pre-built Java data structures with those data

You can get the web content using the Android HTTPClient (or follow something like the guide on this page).
For storage, you need to parse the JSON - see this SO question.
For storage, either store the raw JSON in a file or create an SQLite database and store it according to your specifications.