how to pass list of objects through intent

Question

I am trying to pass the list of object from one activity to another. But not able to send it.

Here is my code.

 setPrefBtn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Intent homePageIntent = new Intent(SetPreferences.this,
                        KlarityHome.class);// Connecting setPreferences page
                // with Klarity Home Page

               List<PracticeVO> tempList = new ArrayList<PracticeVO>();
               tempList.add(practiceObj);
                     homePageIntent.putExtra("SelectedPractice",       tempList.toArray());
                startActivity(homePageIntent);
            }
            });

And retriving in 2nd activity like this : Intent prefIntent = new Intent(); List preferencedPractices = (List) getIntent().getExtras().get("SelectedPractice");

            ArrayAdapter<PracticeVO> praticeAdapter = new ArrayAdapter<PracticeVO>(this, android.R.layout.simple_spinner_item,
                    preferencedPractices);

              praticeAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            practiceSpin.setAdapter(praticeAdapter);

http://stackoverflow.com/questions/17453297/passing-arraylist-of-string-arrays-from-one-activity-to-another-in-android — Yogendra, Mar 26 '15 at 12:16
check here http://stackoverflow.com/questions/20421315/issue-with-passing-a-custom-arraylist-through-intent-with-serialize — vinay, Mar 26 '15 at 12:18

score 1 · Answer 1 · edited May 23 '17 at 12:32

You need to use putExtra() function to pass values to another activity

Intent newIntent = new Intent(MainActivity.this, ResultActivity.class);
newIntent.putExtra("yourTxtField",yourTxtField.getText());

to receive you need to use other getIntent and Bundle.

Intent myIntent = getIntent();
Bundle valores  = myIntent.getExtras();

//Objeto que vai calcular os resultados
Resultado resultado = new Resultado();

//Recupera os valores recebidos pelo intent
double seuDinheiro  =  Double.parseDouble((String) valores.get("seuDinheiro").toString());

To pass objects see this SO post

How do I pass an object from one activity to another on Android?

How to pass an object from one activity to another on Android

You can't pass objects as an extra like this – bwegs Mar 26 '15 at 12:20 — bwegs, Mar 26 '15 at 12:20

score 1 · Answer 2 · answered Mar 26 '15 at 12:32

Try in this manner

ArrayList<Object> object = new ArrayList<Object>();
Intent intent = new Intent(Current.class, Transfer.class);
Bundle args = new Bundle();
args.putSerializable("ARRAYLIST",(Serializable)object);
intent.putExtra("BUNDLE",args);
startActivity(intent);

In the Transfer.class

Intent intent = getIntent();
Bundle args = intent.getBundleExtra("BUNDLE");
ArrayList<Object> object = (ArrayList<Object>) args.getSerializable("ARRAYLIST");

score 0 · Answer 3 · answered Mar 26 '15 at 12:18

0

What type is PracticeVO? In order to do what you are intending, PracticeVO needs to implement the Parcelable interface (http://developer.android.com/reference/android/os/Parcelable.html). Then you can use this version of the putExtra() method: http://developer.android.com/reference/android/content/Intent.html#putExtra(java.lang.String, android.os.Parcelable[]).

answered Mar 26 '15 at 12:18

curob

705
4
17

PracticeVO is a class – Aditya Joshi Mar 26 '15 at 12:27
I guess what I meant was: "What does it extend and/or implement?" I had assumed it was a class (or interface) given the name of the type. – curob Mar 26 '15 at 12:46

score 0 · Answer 4 · edited Nov 11 '17 at 10:28

implement Serializable in your PracticeVO class file

When sending from an activity:

List<PracticeVO> PracticeVO = new ArrayList<PracticeVO>;
Intent intent = new Intent(SourceActivity.this, TargetActivity.class);
intent.putExtra("PracticeVO", ArrayList<PracticeVO> PracticeVO);
startactivity(PracticeVO);

At the receiver side:

List<Question> questions = new ArrayList<Question>();
questions = (ArrayList<Question>)getIntent().getSerializableExtra("QuestionListExtra");

source: Link

Ravichandra S V · Answer 5 · 2017-05-26T08:37:57.190

0

Notification fundinProgram = (Notification) getIntent().getSerializableExtra(DETAIL_OBJECT);

edited May 26 '17 at 08:37

answered May 25 '17 at 08:14

Ravichandra S V

129
1
6

I've formatted your code for you - but to make this answer actually useful, please include some explanation on how it solves the OP's issue. – Tom May 25 '17 at 08:37

score 0 · Answer 6 · answered Jul 04 '19 at 08:01

I was able to achieve it this way:

Make your model class (PracticeVO) as well as your Activity class (KlarityHome) implement Serializable.
```
public class MyClass implements Serializable {...}
```
In your activity class, store your objects in an ArrayList rather than a List.

Finally, you can do this:

// create intent
Intent homePageIntent = new Intent(SetPreferences.this, KlarityHome.class);

// create your ArrayList and add your item(s)
List<PracticeVO> tempList = new ArrayList<PracticeVO>();
tempList.add(practiceObj);

// add your arraylist to your intent
homePageIntent.putExtra("SelectedPractice", tempList);

// go go go ;-)
startActivity(homePageIntent);

I hope this helps. Merry coding!

how to pass list of objects through intent

6 Answers6