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?
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I'm using retrofit to parse json, and after parsing it will give pojo objects. I want store data to sqlite so I'm extracting data from pojo to store it in db. Is this a good approach?
Because retrofit converts json to pojo and again I have to extract pojo to get data. This is time consuming; any better approach?
It is good approach as it keeps your data organised. The only part I didn't understand is what do you mean by extacting from pojo.
For insert or update operation you should use pojo instead of directly using json object or string.
Converting json to pojo keeps data ready for showing on UI as well as Storing in database without complex code.
For time managment I would suggest check out Suger ORM it will save you some time.
Hope it was helpful.
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/
Is it possible to send user defined objects through HttpURLConnection without using json in android ? For example: I am creating one class and I want to send that class object without using json. Is it possible? If it is, how to proceed?
Yes, it is possible, but you have to write/read data into streams manually. That is why JSON is good way for doing that- all data is already formatted and is in String representation. If you don't want to bother yourself with parsing objects to/from Json, use Gson library from Google
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'm very new to Android and I'm currently working on Android app that will parse JSON from a Restful API and display some of the data in a list view. I've looked into using GSON for parsing as the JSON was quite complex. Now my main problem is figuring out how to store the data somewhere so the app doesn't need to reload itself every time the activity is clicked on. I've looked at few questions here but they all seem to point to JSON only not GSON. Could anyone recommend an efficient way of doing this?
Thanks
if you want to store the data permanent it's the best way to insert your deserialized objects into a sqlite database or store them local to the disk as a file.
if your intention is to load the data for each startup, it's easier. just put your object into a public static object. so you can check if the object is not null or not. if it's null you have to load the data.
another opportunity is using the SharedPreferences.