I am new to Android and I got an assignment where I have to use JSON parser to parse the link and display the content in tabular form and its table field. When clicked, it should open some sections. Please, if anyone knows any kind of tutorial on how to do it, it would be really great. Thank you.
You can use gson to parse the incoming data into POJO. It will be as simple as writing a class that matches your JSON data format.
or just just the GSON framework from google
you will need to create a Pojo(or Bean) with basic constructor and fileds matching the name of the json String.
something like:
Gson gson = new Gson();
gson.fromJson(jsonProvider, new TypeToken<Contact>(){
}.getType()
);
in this case the POJO is named Contact. After that u have an object filled with ur json data that u can use to do what ever u want...
hope this helps
Related
I'm a newbie in Android. I'm making a crypto currency tracker. I'm using a Korean exchange API. But, when I read JSON data as String, it's a little different from what I found in literature.
In the red bracket, there are some data but are classified as the String like "BTC, ETH". And I learned in a book like this
String timestamp;
String payment_currency; // payment currency(USD, KRW...)
ArrayList<BidAskBithumb> bids = new ArrayList<BidAskBithumb>(); // Bids
ArrayList<BidAskBithumb> asks = new ArrayList<BidAskBithumb>(); // Asks
Every property is saved in String and Arrays. But in that JSON data, there is currency's name like BTC or ETH after payment_currency String. I don't know I have to make every class file like BTC.java or ETH.java. How can I solve this?
This is the JSON response I'm getting.
I read all the currency's data:
The original API documentation link.
I don't know I have to make every class file like BTC.java or ETH.java. How can I solve this?
No, you dont have to create new class files for them, you need to create model class according to your json file. & handle its behaviour.
You can try this to create your model.
why the data that I put on my .json doesn't work on my native android app, I'm making an app that shows animals with images and info about them and I am following a youtube tutorial but the one that the dude uses it work perfectly but mine doesn't.
am I not making the right steps to put the info correctly?
whats a better way to pull info from a json?
I simply don't know.
this is my json format for tests:
https://gist.githubusercontent.com/fernandopuma/d33dffc07c9dfec267ff2029e79ad125/raw/fff8018e890d34b690bfaeda630249917dd2bc42/galeria.json
and this is the other:
https://gist.githubusercontent.com/draskomikic/372a8ca88d6d88ec2e45/raw/e95badd14bf24abc1b7a6dfdf4a8070515650eca
and in the project this is the line where it supose to show the work in the app, it is in the file of values/strings.xml
<string name="gallery_feed">https://gist.githubusercontent.com/draskomikic/372a8ca88d6d88ec2e45/raw/e95badd14bf24abc1b7a6dfdf4a8070515650eca</string>
I'll apreciate some opinions
thanks!!
Here are some thoughts:
1. Use jsonschema2pojo website to create Java classes from JSON
2. Add them to the project
3. Fix current JSON formatting, for example in galeria.json you have an extra comma in the end that is not supposed to be there
4. Add gson-2.7.jar library to the project
5. Use similar snippet to convert JSON into you Java objects
Gson gson = new Gson();
String json = you_json_string_with_lots_of_objects;
Type type = new TypeToken<List<Your_Animal_Object>>() {
}.getType();
List<Your_Animal_Object> list = gson.fromJson(json, type);
6. You will get a list of animal objects
how to extract some criteria from this page http://www.zigwheels.com/api/zigtvApi.php?method=data&module=News§ion=News
and filter this ( content_id , thumbnail, summary , headline , image) to display them as rss feeds in my android GUI
The output from that URL looks like a JSON feed. You can easily parse JSON data in Android using the JsonObject - see this tutorial for a comprehensive example.
A better (and probably easier) solution would be to use Google Gson and extract the object that way. I've written a full (compilable) program you can use as an example here.
You are receiving a JSONArray from that page. You should create some objects from that JSONArray which will be later displayed in a ListView. For retrieving objects from that feed you could use Json or Gson as #Marvin Pinto suggested, or you could also have a look at my ObjectFactory project, which is a very simple and easy to use parser. It can simply create your objects from a json or xml feed, and you could also use it asynchronously.
After you fetch your objects, with your desired option, you can create a ListAdapter and use it to display your objects in your ListView.
I am new to Android Application Development. Please help me how to store JSON file to my sqlite3 database.
Thanks for helping...
u have json content. First u have to split all the datas from that.(It is in the form of json object and json array).
U ll get as string,
then put into database.
You can store JSON object as a String form .. What problem are you getting in that?
You need parse the jsonobject to stings ,For json parsing you can go through with following link http://www.androidhive.info/2012/01/android-json-parsing-tutorial/
I am parsing an API through
ArrayList<Spot> spots = Gson.fromJson(response , new TypeToken<Arraylist<Spot>>(){}.getType())
My response is perfectly fine, but when I see the response through Gson.toJson(spots). It shows me empty objects, means it have parsed the first field of each object in the API but internals fields of each object is not parsed.
I receive null values if I access the internal fields which is obvious . Can any one let me know where the problem lies, why its not parsing any internal field? .
Maybe you have to use List instead of ArrayList.
When you create your json use:
List<Spot> spots = new ArrayList<Spot>();
gson...
And when you parse the response use:
List<Spot> spots = Gson.fromJson(response , new TypeToken<List<Spot>>(){}.getType());
If that does not work, please show your json and the Spot class.