private String[] getChoices() {
        JSONArray opts = actionOptionsJSON.optJSONArray("choices");

        if (opts == null)
            return null;

        String[] choices = new String[opts.length()];

        for (int i = 0; i < choices.length; i++) {
            choices[i] = opts.optString(i);
        }

        return choices;
    }
List of possible choices for input actions.
src/android/action/Action.java