How to sort GSON Array based on a key?

Question

Consider the following is my Array

[
  {\"id\":10,\"name\":\"name10\",\"valid\":true},
  {\"id\":12,\"name\":\"name12\",\"valid\":false},
  {\"id\":11,\"name         


        

Answer 1

First of all, the proper way to parse your JSON is to create a class to encapsulate your data, such as:

public class MyClass {
    private Integer id;
    private String name;
    private Boolean valid;
    //getters & setters
}

And then:

Type listType = new TypeToken>() {}.getType();
List myList = new Gson().fromJson(strArrayText, listType);

---

Now you have a List and you want to sort it by the value of the attribute id, so you can use Collections as explained here:

public class MyComparator implements Comparator {
    @Override
    public int compare(MyClass o1, MyClass o2) {
        return o1.getId().compareTo(o2.getId());
    }
}

And finally:

Collections.sort(myList, new MyComparator());