how to get json array into dialog fragment

Question

I have an issue in a dailog fragment. I want to get a json array into the dailog fragment, but I don't know how to do it, here is what am trying. Any suggetion's ?

public class MyAlertSortDialogFragmentIndividual extends DialogFragment {
public static final String DATA = "items";
public static final String SELECTED = "selected";
CharSequence[] cs;
ArrayList<User> transactionList = new ArrayList<>();
List <User> users;
String s;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
     users=new ArrayList<>();
    Bundle bundle = getArguments();
    AlertDialog.Builder dialog = new AlertDialog.Builder(getContext());
    dialog.setTitle("Sort By");
    dialog.setPositiveButton("Cancel", new PositiveButtonClickListener());
    bundle.putSerializable("key", transactionList);

    String str = bundle.getString("str");

    users = new Gson().fromJson(str,ArrayList.class);


    return dialog.create();
}
class PositiveButtonClickListener implements DialogInterface.OnClickListener {
    @Override
    public void onClick(DialogInterface dialog, int which) {

        dialog.dismiss();

    }
}

DialogInterface.OnClickListener selectItemListener = new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        // process
        //which means position

        dialog.dismiss();
    }
};

how should I get the data from model class.

show me your str value String str = bundle.getString("str"); this one — Sushant Gosavi, Oct 12 '17 at 09:09
users = new Gson().fromJson(str,ArrayList.class); here in this line you have to set the class name which has the instance in this str ...................herer ,ArrayList.class wrong value — Sushant Gosavi, Oct 12 '17 at 09:10
also post code where you send this str value to MyAlertSortDialogFragmentIndividual this fragment — Sushant Gosavi, Oct 12 '17 at 09:12
actually my problem is that i need array list of json data into dialog box and i did not found any suitable example for the same. — subhash, Oct 12 '17 at 09:27

Sharath kumar · Answer 1 · 2017-10-12T09:22:41.287

1

public class NewItem {

private String name;
private String age;

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getAge() {
    return age;
}

public void setAge(String age) {
    this.age = age;
 }
}

If this is your model class then to get data:

 String userName,age;
 for (NewItem item : users) {
      if(item.getName().equals(REQUIRED_USERNAME)){
         userName = item.getName();
         age = item.getAge();
      }
  }

edited Oct 12 '17 at 09:22

answered Oct 12 '17 at 08:15

Sharath kumar

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you can create the constructor and pass the parameter of array – Rajasekhar Oct 12 '17 at 08:29
i want to json array list data into dialog fragment with single choice – subhash Oct 12 '17 at 08:56
what you mean by single choice?Your users list wil contain all user names..You have to choose one? – Sharath kumar Oct 12 '17 at 08:58
yes exactly my requirement like that can you suggest me how to do? – subhash Oct 12 '17 at 09:19
But you need to know whch user you want right.See the updated code.You should do like that. – Sharath kumar Oct 12 '17 at 09:21
i passed shared prefrences value for first user after clicked the user i want to user list can you show me the code where you wright on that. – subhash Oct 12 '17 at 09:33
see the updated code.Instead of REQUIRED_USERNAME your should pass the name from the preferences and your problem is solved. – Sharath kumar Oct 12 '17 at 09:34
java.lang.NullPointerException: Attempt to invoke interface method 'java.util.Iterator java.lang.Iterable.iterator()' on a null object reference – subhash Oct 12 '17 at 10:03
Then users must be null – Sharath kumar Oct 12 '17 at 10:04

score 0 · Answer 2 · answered Oct 12 '17 at 10:27

First the json format you get is not valid json format send json format like

 {
    "Users": [
        {
            "username": "ashish",
            "userid": "97"
        }
    ]
}

not like -"Users": [ { "username": "ashish", "userid": "97" } ]

after that map this into class

public class UsersResponce implements Serializable {

    @SerializedName("Users")
    @Expose
    private List<User> users = null;

    public List<User> getUsers() {
        return users;
    }

    public void setUsers(List<User> users) {
        this.users = users;
    }

    public class User  implements Serializable{

        @SerializedName("username")
        @Expose
        private String username;
        @SerializedName("userid")
        @Expose
        private String userid;

        public String getUsername() {
            return username;
        }

        public void setUsername(String username) {
            this.username = username;
        }

        public String getUserid() {
            return userid;
        }

        public void setUserid(String userid) {
            this.userid = userid;
        }

    }
}

Than pass that str value and get Pojo Class like

UsersResponce users = new Gson().fromJson(str,UsersResponce.class);
if(null!=UsersResponce){
   List<User> usersList =UsersResponce.getUsers();
   if(null!=usersList&&usersList.size()>0){
     for (User item : usersList) {
      if(item.getUserid().equals(CURRENT_LOGIN_USERID)){
         //than set your adapter selcted here 
      }
     }
   }
}

For single choice adapter refer this link

how to get json array into dialog fragment

2 Answers2