create a JSON Array of objects in java android

Question

I have created a class Game that looks like this:

public class Game{
private String name;
private String location;
private int participants;

public Game(String name, String location, int participants){
     this.name = name;
     this.location = location;
     this. participants = participatns;
}

//getters and setters of all properties

And I have a ArrayList that looks like this:

 ArrayList<Game>gameList = new ArrayList<Game>();

This ArrayList contains 5 games. I want to send those games to a php script so I figured that the smartest way to do this is to create a JSON array of objects and send those to the php script because those games could also be a 100 or more at some point.

My question is, how do I create a JSON array of Game objects?

look at the JSONArray and JSONObject classes

x4rf41
– x4rf41

2013-03-01 13:23:22 +00:00
Commented Mar 1, 2013 at 13:23 — x4rf41
– x4rf41, Commented Mar 1, 2013 at 13:23
what about GSON? javacodegeeks.com/2011/01/…

fmsf
– fmsf

2013-03-01 13:31:46 +00:00
Commented Mar 1, 2013 at 13:31 — fmsf
– fmsf, Commented Mar 1, 2013 at 13:31

vikasing · Accepted Answer · 2013-03-01 13:42:59Z

2

Use Gson: https://sites.google.com/site/gson/gson-user-guide#TOC-Using-Gson

Game game = new Game();
Gson gson = new Gson();
String json = gson.toJson(game);

answered Mar 1, 2013 at 13:42

vikasing

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2 Comments

Fabian Over a year ago

Okay, and if I have an arraylist of games. Can I just put the arraylist into the toJSON function of the gson object?

vikasing Over a year ago

yes, have a look at sites.google.com/site/gson/…

Cameron Lowell Palmer · Accepted Answer · 2013-03-02 11:42:19Z

1

The best thing to do is get into GSON. GSON web site,

public class ExampleObject {
    public static final String API_KEY = "get_response";
    private static final String OFFSETS = "offsets";

    @SerializedName(OFFSETS)
    private List<Integer> mOffsets;



    public ExampleObject() {
        super();
    }

    public String getAPIKey() {
        return API_KEY;
    }

    public List<Integer> getOffsets() {
        return mOffsets;
    }
}

edited Mar 2, 2013 at 11:42

answered Mar 1, 2013 at 13:43

Cameron Lowell Palmer

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2 Comments

Fabian Over a year ago

Does GSON also work with arraylists of objects? In the examples I only see primitive types or objects.

Cameron Lowell Palmer Over a year ago

Yes. It does. I use it for very complex object serialization and deserialization. Interesting personal experience, outbound (JAVA-to-JSON) serialization performed slower than inbound (JSON-to-JAVA) serialization.

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