json - Why isn't there a remove(int position) method in Android's JSONArray?

Question

I started building an Android app that uses a flat file for storage. The app doesn't store more than six records, and I'm familiar with JSON, so I just write out a JSONArray to the file.

I just discovered today, though, that the Android JSON API doesn't include a remove() option. Huh? Do I have to dump the array into another collection, remove it, then rebuild the JSONArray? What's the point?

Answer 1

This is useful sometimes in android when you want to use the json structure directly, without looping around to convert. Please use this only when you do things like removing a row on long clicks or something like that. Don't use that inside a loop!

Notice that I only use this when I'm handling JSONObject inside the array.

public static JSONArray remove(final int idx, final JSONArray from) {
    final List<JSONObject> objs = asList(from);
    objs.remove(idx);

    final JSONArray ja = new JSONArray();
    for (final JSONObject obj : objs) {
        ja.put(obj);
    }

    return ja;
}

public static List<JSONObject> asList(final JSONArray ja) {
    final int len = ja.length();
    final ArrayList<JSONObject> result = new ArrayList<JSONObject>(len);
    for (int i = 0; i < len; i++) {
        final JSONObject obj = ja.optJSONObject(i);
        if (obj != null) {
            result.add(obj);
        }
    }
    return result;
}