Question

66

Convert Java List to Javascript Array

rated 0 times [ 71] [ 5] / answers: 1 / hits: 33120 / 11 Years ago, fri, january 10, 2014, 12:00:00

I have the following java code in my Android application and wanted a way to convert the Java list to an array that can be used in javascript:

Java:

public void onCompleted(List<GraphUser> users, Response response) {

    for(int i = 0; i < users.size(); i++)

    {

             //add to an array object that can be used in Javascript

             webView.loadUrl(javascript:fetchFriends(arrObj));        

    }               

 }

Javascript:

  //this is how I want to be able to use the object in Javascript

    function parseFriends(usersObjectFromJava){

       var users = [];

        for (var i = 0; i < usersObjectFromJava.length; i++) {

            var u = {

                Id: usersObjectFromJava[i].id + ,

                UserName: usersObjectFromJava[i].username,

                FirstName: usersObjectFromJava[i].first_name,

                LastName: usersObjectFromJava[i].last_name,

            };

            users[i] = u;

        }

    }

Could some help me with the Java code to create the usersObjectFromJava so that it can be used in javascript?

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

jamaal

Add To Favorites

Follow

Total Points: 515

Total Questions: 102

Total Answers: 107

Location: France

Member since Thu, May 6, 2021

3 Years ago

answered 11 Years ago leighrheac · Accepted Answer

I would assume doing this:

Java:

public void onCompleted(List<GraphUser> users, Response response) {

    JSONArray arr = new JSONArray();

    JSONObject tmp;

    try {

        for(int i = 0; i < users.size(); i++) {

             tmp = new JSONObject();

             tmp.put(Id,users.get(i).id); //some public getters inside GraphUser?

             tmp.put(Username,users.get(i).username);

             tmp.put(FirstName,users.get(i).first_name);

             tmp.put(LastName,users.get(i).last_name);

             arr.add(tmp);

        }



        webView.loadUrl(javascript:fetchFriends(+arr.toString()+));         

    } catch(JSONException e){

        //error handling

    }

}

JavaScript:

function fetchFriends(usersObjectFromJava){

   var users = usersObjectFromJava;

}

You will have to change the Java-Code a bit (i.e. using public getters or add more/less information to the JSONObjects.
JSON is included in Android by default, so no external libraries are necessary.

I hope i understood your problem.

Small thing i came across: you where using fetchFriends in Java but its called parseFriends in Javascript, I renamed them to fetchFriends