Android adding Json objects into an Array

Question

What I'm trying to do is create a JSONObject that contains an Array of other JSONObjects that are organized by a String? for example i want to create a JSONObject that contains an array of objects that contain fixtures that are also organized by match date

to give you a visual reference of what i am trying to acheive

JSONObject (JSONArray("Object 10/10/12" {(fixtures content)(fixtures content)}")
                     ("Object 11/10/12" {(fixtures content)(fixtures content)}"))

heres what i have tried so far but just can't get it to work

        String matchDate1 = null;
        JSONArray datesArray = null;
        JSONObject fixturesInfo = null;
        JSONArray fixturesInfoArray = null;
        String matchDateTemp = null;

        for(int f = 0; f < fixturesArray.length(); f++){

            JSONObject matchDateDict = fixturesArray.getJSONObject(f);
            matchDate1 = matchDateDict.getString("matchdate");
            JSONArray fixturesInfoDict = fixturesInfo.getJSONArray(matchDate1);

           if(fixturesInfoDict == null){
               tempArray = null;
           } else {
               tempArray = fixturesInfoDict;
           }

           if(matchDateTemp != matchDate1){
              fixturesInfoArray.put(matchDate1);
           }

          matchDateTemp = matchDate1;

          tempArray.put(fixturesArray.getJSONObject(f));
          fixturesInfo.put(matchDate1, tempArray);

        }




            Log.v("MyFix", "fixturesInfo = " + fixturesInfo);

        }catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

heres the json feed

{
    "code": 200,
    "error": null,
    "data": {
        "fixtures": [{
            "kickoff": "15:00:00",
            "matchdate": "2012-07-14",
            "homescore": null,
            "awayscore": null,
            "attendance": null,
            "homepens": null,
            "awaypens": null,
            "division_id": "5059",
            "division": "Testing 1",
            "comp": "LGE",
            "location": null,
            "fixture_note": null,
            "hometeam_id": "64930",
            "hometeam": "Team 1",
            "awayteam_id": "64933",
            "awayteam": "Team 4"
        }, {
            "kickoff": "15:00:00",
            "matchdate": "2012-07-14",
            "homescore": null,
            "awayscore": null,
            "attendance": null,
            "homepens": null,
            "awaypens": null,
            "division_id": "5059",
            "division": "Testing 1",
            "comp": "LGE",
            "location": null,
            "fixture_note": null,
            "hometeam_id": "64935",
            "hometeam": "Team 6",
            "awayteam_id": "64937",
            "awayteam": "Team 8"
        }, {
            "kickoff": "15:00:00",
            "matchdate": "2012-07-28",
            "homescore": null,
            "awayscore": null,
            "attendance": null,
            "homepens": null,
            "awaypens": null,
            "division_id": "5059",
            "division": "Testing 1",
            "comp": "LGE",
            "location": null,
            "fixture_note": null,
            "hometeam_id": "64930",
            "hometeam": "Team 1",
            "awayteam_id": "64931",
            "awayteam": "Team 2"
        }, {
            "kickoff": "15:00:00",
            "matchdate": "2012-07-28",
            "homescore": null,
            "awayscore": null,
            "attendance": null,
            "homepens": null,
            "awaypens": null,
            "division_id": "5059",
            "division": "Testing 1",
            "comp": "LGE",
            "location": null,
            "fixture_note": null,
            "hometeam_id": "64930",
            "hometeam": "Team 1",
            "awayteam_id": "64931",
            "awayteam": "Team 2"
        }]
    }
}

Evgeniy Mishustin · Accepted Answer · 2016-07-03 13:44:59Z

From what you say, you seem like trying to build a JSONArray out of some JSONObjects. This might help:

public void writeJSON() {
    JSONObject user = new JSONObject();
    JSONObject user2;
    user2 = new JSONObject();
    try {
        user.put("dish_id", "1");
        user.put("dish_custom", "2");
        user.put("quantity", "2");
        user.put("shared", "2");

        user2.put("dish_id", "2");
        user2.put("dish_custom", "2");
        user2.put("quantity", "4");
        user2.put("shared", "3");
    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    JSONArray notebookUsers = new JSONArray();
    notebookUsers.put(user);
    notebookUsers.put(user2);
    System.out.println("the JSON ARRAY is"+notebookUsers);

Here 2 json objects are added to 1 JSONArray.

The output of the System.out.println will look something like this:

the JSON ARRAY is[{"shared":"2","dish_custom":"2","dish_id":"1","quantity":"2"},{"shared":"3","dish_custom":"2","dish_id":"2","quantity":"4"}]

And the string comparison you are using is not right.

if(matchDateTemp != matchDate1)

u cannot compare strings like that. u can use something like:

if(!(matchDateTemp.equals(matchDate1)))

sunil · Accepted Answer · 2012-07-12 11:41:13Z

Best thing to parse JSON is to use GSON. What you have to do is

Download GSON jar and add to your build path
Now create classes that represent your JSON data structure
Parse the data in just one line. GSON will do that for you

parsing in just one line

String json = "{\"code\":200,\"error\":null,\"data\":{\"fixtures\":[{\"kickoff\":\"15:00:00\",\"matchdate\":\"2012-07-14\",\"homescore\":null,\"awayscore\":null,\"attendance\":null,\"homepens\":null,\"awaypens\":null,\"division_id\":\"5059\",\"division\":\"Testing 1\",\"comp\":\"LGE\",\"location\":null,\"fixture_note\":null,\"hometeam_id\":\"64930\",\"hometeam\":\"Team 1\",\"awayteam_id\":\"64933\",\"awayteam\":\"Team 4\"},{\"kickoff\":\"15:00:00\",\"matchdate\":\"2012-07-14\",\"homescore\":null,\"awayscore\":null,\"attendance\":null,\"homepens\":null,\"awaypens\":null,\"division_id\":\"5059\",\"division\":\"Testing 1\",\"comp\":\"LGE\",\"location\":null,\"fixture_note\":null,\"hometeam_id\":\"64935\",\"hometeam\":\"Team 6\",\"awayteam_id\":\"64937\",\"awayteam\":\"Team 8\"},{\"kickoff\":\"15:00:00\",\"matchdate\":\"2012-07-28\",\"homescore\":null,\"awayscore\":null,\"attendance\":null,\"homepens\":null,\"awaypens\":null,\"division_id\":\"5059\",\"division\":\"Testing 1\",\"comp\":\"LGE\",\"location\":null,\"fixture_note\":null,\"hometeam_id\":\"64930\",\"hometeam\":\"Team 1\",\"awayteam_id\":\"64931\",\"awayteam\":\"Team 2\"},{\"kickoff\":\"15:00:00\",\"matchdate\":\"2012-07-28\",\"homescore\":null,\"awayscore\":null,\"attendance\":null,\"homepens\":null,\"awaypens\":null,\"division_id\":\"5059\",\"division\":\"Testing 1\",\"comp\":\"LGE\",\"location\":null,\"fixture_note\":null,\"hometeam_id\":\"64930\",\"hometeam\":\"Team 1\",\"awayteam_id\":\"64931\",\"awayteam\":\"Team 2\"}]}}";

MatchDetails matchDetails=new Gson().fromJson(json,MatchDetails.class);
System.out.println(matchDetails);

Now the MatchDetails class has all the Fixture Lists you need
access the fixture array via matchDetails.getData().getFixtures();

the MatchDetails class

public class MatchDetails {

    //"code":200,"error":null

    private String code;
    private String error;
    private Fixtures data;
    /**
     * Gets the code.
     * 
     * @return <tt> the code.</tt>
     */
    public String getCode() {
        return code;
    }
    /**
     * Sets the code.
     *
     * @param code <tt> the code to set.</tt>
     */
    public void setCode(String code) {
        this.code = code;
    }
    /**
     * Gets the error.
     * 
     * @return <tt> the error.</tt>
     */
    public String getError() {
        return error;
    }
    /**
     * Sets the error.
     *
     * @param error <tt> the error to set.</tt>
     */
    public void setError(String error) {
        this.error = error;
    }
    /**
     * Gets the data.
     * 
     * @return <tt> the data.</tt>
     */
    public Fixtures getData() {
        return data;
    }
    /**
     * Sets the data.
     *
     * @param data <tt> the data to set.</tt>
     */
    public void setData(Fixtures data) {
        this.data = data;
    }
    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return "MatchDetails [code=" + code + ", error=" + error + ", data="
                + data + "]";
    }


}

EDIT edited Fixtures class with sortFixtures function. Use it as below

String json = "{\"code\":200,\"error\":null,\"data\":{\"fixtures\":[{\"kickoff\":\"15:00:00\",\"matchdate\":\"2012-05-14\",\"homescore\":null,\"awayscore\":null,\"attendance\":null,\"homepens\":null,\"awaypens\":null,\"division_id\":\"5059\",\"division\":\"Testing 1\",\"comp\":\"LGE\",\"location\":null,\"fixture_note\":null,\"hometeam_id\":\"64930\",\"hometeam\":\"Team 1\",\"awayteam_id\":\"64933\",\"awayteam\":\"Team 4\"},{\"kickoff\":\"15:00:00\",\"matchdate\":\"2012-07-14\",\"homescore\":null,\"awayscore\":null,\"attendance\":null,\"homepens\":null,\"awaypens\":null,\"division_id\":\"5059\",\"division\":\"Testing 1\",\"comp\":\"LGE\",\"location\":null,\"fixture_note\":null,\"hometeam_id\":\"64935\",\"hometeam\":\"Team 6\",\"awayteam_id\":\"64937\",\"awayteam\":\"Team 8\"},{\"kickoff\":\"15:00:00\",\"matchdate\":\"2012-12-28\",\"homescore\":null,\"awayscore\":null,\"attendance\":null,\"homepens\":null,\"awaypens\":null,\"division_id\":\"5059\",\"division\":\"Testing 1\",\"comp\":\"LGE\",\"location\":null,\"fixture_note\":null,\"hometeam_id\":\"64930\",\"hometeam\":\"Team 1\",\"awayteam_id\":\"64931\",\"awayteam\":\"Team 2\"},{\"kickoff\":\"15:00:00\",\"matchdate\":\"2012-01-28\",\"homescore\":null,\"awayscore\":null,\"attendance\":null,\"homepens\":null,\"awaypens\":null,\"division_id\":\"5059\",\"division\":\"Testing 1\",\"comp\":\"LGE\",\"location\":null,\"fixture_note\":null,\"hometeam_id\":\"64930\",\"hometeam\":\"Team 1\",\"awayteam_id\":\"64931\",\"awayteam\":\"Team 2\"}]}}";

MatchDetails matchDetails=new Gson().fromJson(json,MatchDetails.class);
System.out.println(matchDetails);

System.out.println("Unsorted");

Fixtures fixturesObj = matchDetails.getData(); 
List<Fixture> fixtures = fixturesObj.getFixtures();
for (Fixture fixture : fixtures) {
    System.out.println(fixture);
}

System.out.println("Sorted");

fixtures = fixturesObj.sortFixtures();
for (Fixture fixture : fixtures) {
    System.out.println(fixture);
}

The Fixtures class

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.List;

/**
 * <br>
 * <div style="width:600px;text-align:justify;">
 *
 * TODO: Class comment.
 *
 * </div>
 * <br>
 * @author Sunil Kumar E
 *
 */
public class Fixtures {

    private List<Fixture> fixtures;

    /**
     * Gets the fixtures.
     * 
     * @return <tt> the fixtures.</tt>
     */
    public List<Fixture> getFixtures() {
        return fixtures;
    }

    /**
     * Sets the fixtures.
     *
     * @param fixtures <tt> the fixtures to set.</tt>
     */
    public void setFixtures(List<Fixture> fixtures) {
        this.fixtures = fixtures;
    }

    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return "Fixtures [fixtures=" + fixtures + "]";
    }


    public List<Fixture> sortFixtures()
    {
        Collections.sort(getFixtures(), new Comparator<Fixture>() {

            @Override
            public int compare(Fixture o1, Fixture o2) {
                SimpleDateFormat df1 = new SimpleDateFormat("yyyy-MM-dd");

                Date date1 = null;
                Date date2 = null;

                try {
                    date1 = df1 .parse(o1.getMatchdate());
                    date2 = df1 .parse(o2.getMatchdate());
                } catch (ParseException e) {
                    e.printStackTrace();
                }
                if(date1==null || date2==null) return 0;

                if (date1.after(date2))
                    return 1;
                else if(date1.before(date2)) 
                    return -1;
                return 0;
            }
        });

        return getFixtures();
    }
}

the Fixture class

public class Fixture {
//"kickoff":"15:00:00","matchdate":"2012-07-14","homescore":null,
//  "awayscore":null,"attendance":null,"homepens":null,"awaypens":null,
//  "division_id":"5059","division":"Testing 1","comp":"LGE","location":null,
//  "fixture_note":null,"hometeam_id":"64930","hometeam":"Team 1",
//  "awayteam_id":"64933","awayteam":"Team 4"

    private String kickoff;
    private String matchdate;
    private String homescore;
    private String awayscore;
    private String attendance;
    private String homepens;
    private String awaypens;
    private String division_id;
    private String division;
    private String comp;
    private String location;
    private String fixture_note;
    private String hometeam_id;
    private String hometeam;
    private String awayteam_id;
    private String awayteam;
    /**
     * Gets the kickoff.
     * 
     * @return <tt> the kickoff.</tt>
     */
    public String getKickoff() {
        return kickoff;
    }
    /**
     * Sets the kickoff.
     *
     * @param kickoff <tt> the kickoff to set.</tt>
     */
    public void setKickoff(String kickoff) {
        this.kickoff = kickoff;
    }
    /**
     * Gets the matchdate.
     * 
     * @return <tt> the matchdate.</tt>
     */
    public String getMatchdate() {
        return matchdate;
    }
    /**
     * Sets the matchdate.
     *
     * @param matchdate <tt> the matchdate to set.</tt>
     */
    public void setMatchdate(String matchdate) {
        this.matchdate = matchdate;
    }
    /**
     * Gets the homescore.
     * 
     * @return <tt> the homescore.</tt>
     */
    public String getHomescore() {
        return homescore;
    }
    /**
     * Sets the homescore.
     *
     * @param homescore <tt> the homescore to set.</tt>
     */
    public void setHomescore(String homescore) {
        this.homescore = homescore;
    }
    /**
     * Gets the awayscore.
     * 
     * @return <tt> the awayscore.</tt>
     */
    public String getAwayscore() {
        return awayscore;
    }
    /**
     * Sets the awayscore.
     *
     * @param awayscore <tt> the awayscore to set.</tt>
     */
    public void setAwayscore(String awayscore) {
        this.awayscore = awayscore;
    }
    /**
     * Gets the attendance.
     * 
     * @return <tt> the attendance.</tt>
     */
    public String getAttendance() {
        return attendance;
    }
    /**
     * Sets the attendance.
     *
     * @param attendance <tt> the attendance to set.</tt>
     */
    public void setAttendance(String attendance) {
        this.attendance = attendance;
    }
    /**
     * Gets the homepens.
     * 
     * @return <tt> the homepens.</tt>
     */
    public String getHomepens() {
        return homepens;
    }
    /**
     * Sets the homepens.
     *
     * @param homepens <tt> the homepens to set.</tt>
     */
    public void setHomepens(String homepens) {
        this.homepens = homepens;
    }
    /**
     * Gets the awaypens.
     * 
     * @return <tt> the awaypens.</tt>
     */
    public String getAwaypens() {
        return awaypens;
    }
    /**
     * Sets the awaypens.
     *
     * @param awaypens <tt> the awaypens to set.</tt>
     */
    public void setAwaypens(String awaypens) {
        this.awaypens = awaypens;
    }
    /**
     * Gets the division_id.
     * 
     * @return <tt> the division_id.</tt>
     */
    public String getDivision_id() {
        return division_id;
    }
    /**
     * Sets the division_id.
     *
     * @param division_id <tt> the division_id to set.</tt>
     */
    public void setDivision_id(String division_id) {
        this.division_id = division_id;
    }
    /**
     * Gets the division.
     * 
     * @return <tt> the division.</tt>
     */
    public String getDivision() {
        return division;
    }
    /**
     * Sets the division.
     *
     * @param division <tt> the division to set.</tt>
     */
    public void setDivision(String division) {
        this.division = division;
    }
    /**
     * Gets the comp.
     * 
     * @return <tt> the comp.</tt>
     */
    public String getComp() {
        return comp;
    }
    /**
     * Sets the comp.
     *
     * @param comp <tt> the comp to set.</tt>
     */
    public void setComp(String comp) {
        this.comp = comp;
    }
    /**
     * Gets the location.
     * 
     * @return <tt> the location.</tt>
     */
    public String getLocation() {
        return location;
    }
    /**
     * Sets the location.
     *
     * @param location <tt> the location to set.</tt>
     */
    public void setLocation(String location) {
        this.location = location;
    }
    /**
     * Gets the fixture_note.
     * 
     * @return <tt> the fixture_note.</tt>
     */
    public String getFixture_note() {
        return fixture_note;
    }
    /**
     * Sets the fixture_note.
     *
     * @param fixture_note <tt> the fixture_note to set.</tt>
     */
    public void setFixture_note(String fixture_note) {
        this.fixture_note = fixture_note;
    }
    /**
     * Gets the hometeam_id.
     * 
     * @return <tt> the hometeam_id.</tt>
     */
    public String getHometeam_id() {
        return hometeam_id;
    }
    /**
     * Sets the hometeam_id.
     *
     * @param hometeam_id <tt> the hometeam_id to set.</tt>
     */
    public void setHometeam_id(String hometeam_id) {
        this.hometeam_id = hometeam_id;
    }
    /**
     * Gets the hometeam.
     * 
     * @return <tt> the hometeam.</tt>
     */
    public String getHometeam() {
        return hometeam;
    }
    /**
     * Sets the hometeam.
     *
     * @param hometeam <tt> the hometeam to set.</tt>
     */
    public void setHometeam(String hometeam) {
        this.hometeam = hometeam;
    }
    /**
     * Gets the awayteam_id.
     * 
     * @return <tt> the awayteam_id.</tt>
     */
    public String getAwayteam_id() {
        return awayteam_id;
    }
    /**
     * Sets the awayteam_id.
     *
     * @param awayteam_id <tt> the awayteam_id to set.</tt>
     */
    public void setAwayteam_id(String awayteam_id) {
        this.awayteam_id = awayteam_id;
    }
    /**
     * Gets the awayteam.
     * 
     * @return <tt> the awayteam.</tt>
     */
    public String getAwayteam() {
        return awayteam;
    }
    /**
     * Sets the awayteam.
     *
     * @param awayteam <tt> the awayteam to set.</tt>
     */
    public void setAwayteam(String awayteam) {
        this.awayteam = awayteam;
    }
    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return "Fixture [kickoff=" + kickoff + ", matchdate=" + matchdate
                + ", homescore=" + homescore + ", awayscore=" + awayscore
                + ", attendance=" + attendance + ", homepens=" + homepens
                + ", awaypens=" + awaypens + ", division_id=" + division_id
                + ", division=" + division + ", comp=" + comp + ", location="
                + location + ", fixture_note=" + fixture_note
                + ", hometeam_id=" + hometeam_id + ", hometeam=" + hometeam
                + ", awayteam_id=" + awayteam_id + ", awayteam=" + awayteam
                + "]";
    }
}

I can't see the part in your code where it sorts the fixtures by date.
you have all the Fixtures stored in List now and can just apply any date sorting logic to sort the fixtures

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