CODEWITHSUNDEEP
javaandroidjsonretrofit2
shivam
shivam

Reputation: 475

Sort response getting from server in alphabetic order

I am getting response like this from server,

[  
 {  
  "id":"b2",
  "type":"ball"
 },
 {  
  "id":"a1",
  "type":"apple",
 },
 {  
  "id":"d4",
  "type":"dog",
 },
 {  
  "id":"c3",
  "type":"cat",
 }
]

but I need to sort the above response data based on alphabets wise, based on "type". And then display the list, I am using model to parse the data .

Upvotes: 1

Views: 1635

Answers (4)

orip
orip

Reputation: 75497

What data structure are you parsing the JSON into? If, for example, you have an Item class similar to:

class Item {
  Item(String id, String type) { ... }
  String getType() { ... }
  String getId() { ... }
}

And you parse that JSON into some kind of List<Item>, then the following should work for sorting by type (API level 24+), see Comparator.comparing:

List<Item> items = ...; // however you parse the JSON
Comparator<Item> byType = Comparator.comparing(Item::getType);
Collection.sort(items, byType); // items will now be sorted

For a more general approach that will work with older API levels, you can define the byType comparator like this:

Comparator<Item> byType = new Comparator<Item> {
 public int compare(Item a, Item b) {
   return a.getType().compareTo(b.getType());
 }
};

Upvotes: 1

pratikpncl
pratikpncl

Reputation: 528

Convert it to an Object and implement Comparable<> Interface. The use:

CompareTo()

Upvotes: 0

Thiago Neves
Thiago Neves

Reputation: 91

Json is an object is an unordered set of name/value pairs. See http://json.org. Convert to Object to sort.

Upvotes: 0

Enzo Nocera
Enzo Nocera

Reputation: 54

Can't you make your class Comparable and use :

type.compareTo()

In your own compareTo method in oder to be able to sort them by type?

Upvotes: 0

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