CODEWITHSUNDEEP
androidjsongson
Nedlinin
Nedlinin

Reputation: 881

JSON parsing using GSON - Setting up class hierarchy

I can't seem to wrap my head around how to setup my class hierarchy for JSON conversion using GSON.

My JSON looks like:

{
  "Users": {
    "id": 1,
    "name": "Jim",
    "location": "Huntsville"
  }
}

My User List class looks like:

public class UserList {
  public static List<User> Users;

  @SuppressWarnings("static-access")
  public void setUserList(List<User> userList){
      this.Users = userList;
  }

  public List<User> getUserList(){
      return Users;
  }

}

and lastly a user class that looks like this:

public class User {
  private int id;

  private String name;

  private String location;

  public int getId(){
      return id;
  }

  public String getName(){
      return name;
  }

  public String getLocation(){
      return location;
  }

  public String toString(){
      return("User: [id=" + id + "], [name=" + name + "], [location=" + location + "]");
  }

}

Anyone mind giving me a shove in the right direction? I'd appreciate it!

EDIT:

Forgot to show my parsing code.. (Just reading a sample JSON file from SDCard)

        BufferedReader br = new BufferedReader(new FileReader(Environment.getExternalStorageDirectory() + "/user.json"));
        UserList userList = gson.fromJson(br, UserList.class);

Upvotes: 0

Views: 682

Answers (1)

Joey
Joey

Reputation: 1349

are you sure your example JSON is correct? It does not seem to be a list of things, just one user is defined.

Furthermore, your getter and setters for Users, should be following the get/set pattern and be called

public List<User> getUsers()
public void setUsers(List<User> users)

Also, you can follow the Java convention of small case and instruct Gson to use a different casing. Assuming that you only have one entry of Users in your JSON. This would let you parse the snippit you provided, if you change the Users property into User not a list.

@SerializedName("Users")
private User user;

So if you want a list of users you should find that in the json, this should let you parse it as a list, !note that you need to have objects, which are enclosed, like:

{"users" : [{id:"one"}, ...]}

As pointed out in the comments.

Upvotes: 1

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