JSON on Android - serialization

Question

is there any simple example for Android of using JSON in a serialization?

Thanks

score 57 · Accepted Answer · edited May 25 '20 at 05:26

57

We use the gson library for that. Serialization is as simple as calling

new Gson().toJson(obj)

And for deserialization,

new Gson().fromJson(jsonStr, MyClass.class);

edited May 25 '20 at 05:26

Asapha

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answered Sep 08 '11 at 10:48

alex.zherdev

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deserialization : MyClass myClass = new Gson().fromJson(jsonStr, MyClass.class); – Chris Ho Jan 04 '22 at 08:52

score 29 · Answer 2 · edited Dec 12 '18 at 14:10

29

If you want to avoid using another library in your Android project just to (de)serialize JSON, you cau use following code as I do.

To serialize

JSONObject json = new JSONObject();
json.put("key", "value");
// ...
// "serialize"
Bundle bundle = new Bundle();
bundle.putString("json", json.toString());

and to deserialize

Bundle bundle = getBundleFromIntentOrWhaterver();
JSONObject json = null;
try {
    json = new JSONObject(bundle.getString("json"));
    String key = json.getString("key");
} catch (JSONException e) {
    e.printStackTrace();
}

edited Dec 12 '18 at 14:10

Alexander Farber

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answered Mar 07 '13 at 16:34

Martin Edlman

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1

This is cool, but I can't imagine it working well for larger sets of complicated JSON – Pure Function Jan 17 '19 at 21:56
1

You're absolutely right, this is suitable for quite simple and reasonably small JSONs. :-) – Martin Edlman Jan 21 '19 at 10:15

score 0 · Answer 3 · answered Nov 28 '15 at 18:41

There is a simple library to (de)serialize JSON,compatible with android own json library.

// deserialize a java bean to json object 
JSONObject studentJson = JsonDeer.toJson(student);
// serialize a java bean from json object
Student student1 = JsonDeer.fromJson(studentJson,Student.class);

library address

score -1 · Answer 4 · answered Dec 18 '13 at 21:53

    protected void onPostExecute(String results) {
        if (results!=null) {
            try {
                Tec tec_m=new Tec();

                tec_m=new Gson().fromJson(results, Technician.class);

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

JSON on Android - serialization

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