JSON to parse earthquake data for android

Question

I am trying to make an app that uses jsonObject to parse earthquake info. like longitude and latitude and magnitude form http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/4.5_day.geojson and display it in a text view. I dont have much knoweledge in JSON..I have seen some vedio tutorial in YOUTUBE but I am not being able to get what i want...Can some one please provide me with The code to do this.

Answer 1

You want a JSON parsing library. I would suggest you use jackson: http://jackson.codehaus.org/Download

Go to your url (http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/4.5_day.geojson), and copy all the json into your clipboard, then paste it into http://jsonlint.com/ and click verify. This tool will help you see the structure of the json file.

Here is a tutorial using jackson http://www.journaldev.com/2324/jackson-json-processing-api-in-java-example-tutorial

Answer 2

You can use Gson - https://code.google.com/p/google-gson/

import java.util.List;

public class Earthquake {
    public String type;
    public Metadata metadata;
    public double[] bbox;
    public List<Feature> features;

    public class Metadata{
        public long generated;
        public String url, title, api;
        public int status, count;
    }

    public class Feature {
        public String type, id;
        public Properties properties;

        public class Properties{
            public int mag, tz, felt, cdi, sig, gap;
            public String place, url, detail, mmi, alert, status, tsunami, net, code, ids, sources, types, nst, magType, type, title;
            public long time, updated;
            public double dmin, rms;
        }

        public class Geometry{
            public String type;
            public double[] coordinates;
        }

    }

}

With this class made you can do:

String data = getData(); //Get your data as a string
Earthquake e = new Gson().fromJson(data, Earthquake.class);