Convert Object Array to JSON String on Android

Question

I can't seem to find this anywhere, but tons of people have to be doing this.

I have an array of objects that I want to convert to a JSON String and post to a REST URL. Here's what I have so far:

    if(history==null||history.length == 0){
        return new String[0];
    }

    JSONArray array = new JSONArray();
    for(DeviceHistory connectHistory:history){
        array.put(connectHistory);
    }

    JSONObject response = jsonClient.remoteCall(SERVICE_NAME, array.toString());

The problem is that I get ["com.abc.model.connect.DeviceHistory@41e63298","com.abc.model.connect.DeviceHistory@41e63760","com.abc.model.connect.DeviceHistory@41e63c28","com.abc.model.connect.DeviceHistory@41e640f0"] from array.toString(). What am I doing wrong?

Dmitriy Khaykin · Accepted Answer · 2014-02-11 20:18:41Z

2

Because this is the result of Object.toString(). You may want to try:

https://code.google.com/p/google-gson/

This library allows to convert Object to JSON and back.

edited Feb 11, 2014 at 20:18

Dmitriy Khaykin

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answered Feb 11, 2014 at 16:35

nikis

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2 Comments

Thom Over a year ago

You're wrong as to why it's happening, but I ended up solving it using the Gson libraries.

nikis Over a year ago

By casting here I mean result of Object.toString()

zozelfelfo · Accepted Answer · 2014-02-11 16:33:49Z

2

Your problem is that you are not passing your object as a String, so what you are writing in your JSON is a reference to your object.

You should implement your toString() method in that class if you can or just use it. However, if you cant you will need a helper method to achieve it.

answered Feb 11, 2014 at 16:33

zozelfelfo

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