CODEWITHSUNDEEP
androidjsonarraylist
Sartheris Stormhammer
Sartheris Stormhammer

Reputation: 2564

Android json objects to array list in Parcelable class

I don't know of the title is very accurate, but let me explain what I want. I am having this long JSONObject (sadly it's not an array and I can't loop through it) with many other JSONObjects inside of it with similar elements (id, name, icon), and when I read through an element it writes its value in a separate class with implemented Parcelable. Here is what my Parcelable class look like before I explain further:

public class ItemsInfo implements Parcelable {

    public int itemId;
    public String itemName, itemIcon;

    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(itemName);
        dest.writeString(itemIcon);
        dest.writeInt(itemId);
    }

    public static final Parcelable.Creator<ItemsInfo > CREATOR = new Parcelable.Creator<ItemsInfo >() {

        @Override
        public ItemsInfo createFromParcel(Parcel source) {
            ItemsInfo ei = new ItemsInfo();
            ei.itemName = source.readString();
            ei.itemIcon = source.readString();
            ei.itemId = source.readInt();
            return ei;
        }

        @Override
        public ItemsInfo [] newArray(int size) {
            return new ItemsInfo [size];
        }
    };
}

what I want is everytime it reads through a JSONObject with the similar elements, to write them with an ArrayList in the String itemName, so later I can access a given item by only a index or something, and not to have to make separate strings and integers for every different item, like itemName1, itemName2, itemName3..... Is it possible?

Upvotes: 0

Views: 2550

Answers (1)

Phil
Phil

Reputation: 36289

You can use my droidQuery library to simplify JSON parsing. To convert your JSONObject to a Key-Value mapping, you can use this:

List<String> items = new ArrayList<String>();//this will contain your JSONObject strings
Map<String, ?> data = null;
try {
    JSONObject json;//this references your JSONObject
    data = $.map(json);
    
} catch (Throwable t) {
    Log.e("JSON", "Malformed JSON Object");
}

Then, to loop through each element, just do this:

if (data != null) {
    for (Map.Entry<String, ?> entry : data.entrySet()) {
        items.add(entry.value().toString());
    }
}

Now your List items is populated with the String representation of your JSONObejcts. Later, if you want to parse this JSON, just do:

int index = 2;//the index of the JSONObject you want
try {
    Map<String, ?> data = $.map(new JSONObject(items.get(2)));
    //now iterate the map
} catch (Throwable t) {
    t.printStackTrace();//something wrong with your JSON string
}

Upvotes: 1

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