I am a newbie on Android Development.I have a json file formatted like this:
"users": [{
"id": "1",
"name": "Vanessa",
"profilepic": "https://.."
},...
]
I am creating room database but how can I record this user json file into it. I heard about gson but I could not find any solution for my problem
For this you need to first create a model that can parse this kind of json for you. you can use a pretty neat plugin that I have been sing called json to kotlin class.
Steps to install:
Go to file->settings->plugins
search for json to kotlin and install
now just like you make a new file there will be a new option paste your json and give it a name and now it automatically generates a model for you.
Also I will recommend you to watch some tutorials on youtube, my favorite content creator is Philip Lackener he has a very good tutorial on roomdb
I am also new to android development so i get it.
I recommend you to go through a beginner playlist it will really help you get the basics. you also need to see basics of roomdb because what you are asking is really basics of roomdb.
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I'm confused as to when Json is needed to be used in android programming. I have read a couple of tutorials but I'm still blur as to why we need Json and when to use it.
Json is just a format to store data, like XML, you can use it to store whatever you want or don't use it at all. However in terms of database access the thing is that natively Android can only access local SQLite databases, which are not suitable for projects that require a centralized database that change dynamically (and is accessed from many devices concurrently), so in that cases the most popular solution is to setup a JSON-RPC Server which will act as intermediary between the Android app and the database.
From the app you will remotely call a method on the server which will execute the query and return the appropriate results.
Actually, while JSON format may be used for database operations (as it can be used as a serialisation mechanism for your model objects), the area where you will use it the most is web communication. Most modern web APIs use JSON as a response data format.
As for working with JSON data, consider using org.json library, which is natively included in Android SDK and really easy to use.
As for what JSON is, the full name makes things easier - JavaScript Object Notation. So, basically, it is a way to turn an Object into a String, to enable transferring it between systems.
Json is used every where, not just in android.
It is a light-weight format that is used for data interchanging over the network.
Mostly when writing web-services Json is used instead of XML becuse it is much more lightweight as compared to XML.
You can read more about the why to use json instead of xml, here
http://www.sitepoint.com/json-vs-xml/
JSON isn't always needed. But a lot of people prefer it.
As usual there are multiple ways to get the end-result.
JSON is one of these, and it is pretty simple!
It is a easy way to share data, a lot of sites are using JSON. Think at some news-sites or blogs with a title, date and time stamp, and the actual message('s). Easy to read and implement in an android application.
[
{
"Title": "First Message",
"Date": "01-10-2015",
"Time": "18:00",
"Post": "This is one message."
},
{
"Title": "SecondMessage",
"Date": "01-10-2015",
"Time": "18:30",
"Post": "This is the second message."
}
]
But you also could get data from an database with a php-script, and load it into applications.
This is screenshot of my Parse Explorer. It has two objects GameScore and TestObject. These are created using Parse SDK for Android. How can I see the data in these objects in Parse Explorer?
I am not clear with your question. I think this might be your solution. You can browse the data in those object in the "Core" Menu. "Core" menu can be found at the top of the web page. Hope this helps. :)
I'm pretty new to android development and I was wondering if I could get some input on what to do in my case. I'm trying to make a list of events that are going on at my school using the calendar that's on its website. The problem is, the only way I found to get to the JSON format is through the .rss which looks like this link
I put it into myjson and got this error message and I have no idea what it means:
Parse error on line 1:
My goal is to be able to use JSON to create a list in a ListView on the app I'm making, but so far I'm completely lost as far as what to do. Any help is appreciated!
JSON is entirely different from RSS.
Look into this tutorial here or check out github, there's a ton of libraries that support RSS parsing such as this or this
I'm hoping this hasn't been repeated before but I've been stuck on this for about an hour now.
I'm using the XMLwise library to parse a remote PList on an Android app. This parsed data returns a Map. The first item in this Map is the data I want, which when logged gives me this when I use getValue() on the Map entry:
[
{
description=Teaching at the University of Kent has been ranked among the best in the UK by the Guardian 2012 University Guide.,
url=http://www.kent.ac.uk/news/homepagestories/university-of-kent-teaching-ranked-among-best-in-uk/2011,
title=University of Kent teaching ranked among best in UK} .....
},
// etc
]
Now I'm fairly new to Android bu that looks like an array of objects to me, from what I know from JSON notation. Java is telling me this is an Object, so I can't seem to parse this or loop through it. I'm wondering if anyone know what the best way to go about parsing this an attaching it to a ListView would be.
As a note, I've tried several different methods of parsing the Plist data and this library is first one that worked so I'm really not interested in other ways to be honest, just hoping to find out how to parse the data I've received.
Thanks very much!
You will need to cast the Object to be an ArrayList<Object> to iterate over it, based on my reading of the source code.
I have been studying Java for a little bit now, and I'm ready to try building something. I think I have the basic understanding of how to build simple parts, but I have a hard time planning out my project. I was hoping you guys could tell me what I would need to make it work.
I am creating an app for work. I work in the ATM business, and we provide tech support for all ATM models. So we have a master list of atm error codes, what models they apply to, their descriptions, and solutions.
From the App I would like to make it searchable by ATM manufacturer->Model->List of error codes to choose from. AND searchable by error code.
What I'm not sure about is how to save such a big list of codes. I've got them formatted like this:
("Hyosung", "1000", "20001", "Unable to Detect Cassette", "Remove and replace cassette - Check the micro-switch located on the inside left wall")
(MANUFACTURER, MODEL, CODE, DESCRIPTION, SOLUTION)
So depending on how the user chooses to search, it could pull all error
There are, maybe, 1000 error codes. Would it be best to save this to a text file that the app can access? How would you guys manage the error codes?
Store it in a SQLite database. It might be a slight overkill in this case, but it's flexible enough (and you really should learn about databases anyway).
Your error codes seem to be in CSV format. So:
On first use of application parse CSV file line by line using one of CSV parsing libs: http://opencsv.sourceforge.net/
Save every line of data as a row in database: http://developer.android.com/guide/topics/data/data-storage.html#db
Create a simple GUI where you enter error code and it returns all data for this error code.