Send list of objects which contain other custom objects from one activity to another

Question

This is my class whose list I want to send to another activity.

public class PostComments {

    public User from;

    public String message;

    public String createdTime;

    public String like_count;

    public Boolean user_likes;
}

This is User class whose object is used in PostComments class.

public class User extends BaseEntity{
    public String photoUrl;
}

And this is BaseEntity Class

public class BaseEntity {
    public String Id;

    public String Name;
}

How can I send this object from one activity to another?

PostComments[] myData = ClickedPost.comments.data;
Intent PostCommentsActivity = new Intent(getActivity() , PostCommentsActivity.class);
getActivity().startActivity(PostCommentsActivity);

Above is the code to open PostCommentsActivity and I want to send myData object to the PostCommentsActivity.

I have searched alot about this problem but every question and tutorial explain that only for a class which contains simple string, int or boolean variables.

Why do you want to send that much data over? Why not just send an ID of an object and then retrieve/construct that object at the destination? — Aleks G, Oct 10 '14 at 08:13
All else failed, you can always serialise the object and deserialise at the destination. — Aleks G, Oct 10 '14 at 08:13
I just want to show this array of my comments on second activity by any means. Can you provide some link that how can I do that? — Yawar, Oct 10 '14 at 08:15

Truong Phu Quoc · Accepted Answer · 2014-10-10T09:07:28.447

1

Let's try:

ArrayList<PostComments> comments = new ArrayList<MainActivity.PostComments>();
comments.add(...) //Add your list data here
Intent intent = new Intent(getActivity() , PostCommentsActivity.class);
intent.putExtra("list_comments", comments);
getActivity().startActivity(intent);

And edit your PostComments Class to:

public class PostComments implements Serializable {

        public String message;

        public String createdTime;

        public String like_count;

        public Boolean user_likes;
    }

In PostCommentsActivity, get bundle to get list comments.

edited Oct 10 '14 at 09:07

answered Oct 10 '14 at 08:14

Truong Phu Quoc

529
4
9

PostComments[] myData = ClickedPost.comments.data; – Yawar Oct 10 '14 at 08:16
I don't have arraylist, its a simple array coming from server. How can I change it to ArrayList? – Yawar Oct 10 '14 at 08:17
This may not work. All of the OP's classes have to be Serialisable for this to work – Aleks G Oct 10 '14 at 08:18
@Yawar if you have to ask this question, then I suggest you start by learning java – Aleks G Oct 10 '14 at 08:18
Can't you provide a tutorial on this. I have completed whole application and now I just need this for my last feature? – Yawar Oct 10 '14 at 08:22
@AleksG: If you send single object, you must implement Serialisable . – Truong Phu Quoc Oct 10 '14 at 08:58
@Yawar: you can use for loop to add single object to arraylist, or use AddAll to add whole array. – Truong Phu Quoc Oct 10 '14 at 09:00
1

@TruongPhuQuoc When you are sending a list or array of objects, each one of them must be serialisable - I know this, but you need to include this into your answer. – Aleks G Oct 10 '14 at 09:01
@AleksG: Sorry, i'm wrong. Thank you very much. I'm updating my answer – Truong Phu Quoc Oct 10 '14 at 09:05
My class also has a property of type User, will it send that too ? – Yawar Oct 10 '14 at 16:03

Send list of objects which contain other custom objects from one activity to another

1 Answers1