Issue : Passing ArrayList between intents loses data

Question

I am passing custom ArrayList in putParcelableArrayListExtra, but when I receive it within onCreate method of other class, then some values of array are null

put...   get...

[a]  ->  [a]

[b]  ->  null

[c]  ->  [b]

[d]  ->  null

[e]  ->  [c]

I am sending data in intent.putParcelableArrayListExtra(key, value); and getting it as arrayList = getIntent().getParcelableArrayListExtra(key));

Kindly suggest how to solve this issue.

Without any parcelable code implementation it's anyones guess. What about sharing the necessary code...??? Try using http://www.parcelabler.com/ for generating the parcelable code and paste it inside your object. — Marko, Feb 02 '16 at 08:57
Post your code of how you implement parcelable interface if it is an ArrayList of Object. — kopikaokao, Feb 02 '16 at 08:58

score 0 · Answer 1 · answered Feb 02 '16 at 09:02

0

You can pass an ArrayList the same way, if the E type is Serializable.

You would call the putExtra (String name, Serializable value) of Intent to store, and getSerializableExtra (String name) for retrieval.

Example:

ArrayList<String> myList = new ArrayList<String>();
intent.putExtra("mylist", myList);

In the other Activity:

ArrayList<String> myList = (ArrayList<String>) getIntent().getSerializableExtra("mylist");

answered Feb 02 '16 at 09:02

Suhas Bachewar

1,234
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1

Parcelable > Serializable in Android. Read this for more info [link](http://www.developerphil.com/parcelable-vs-serializable/) – kopikaokao Feb 02 '16 at 09:04

score 0 · Answer 2 · answered Feb 02 '16 at 09:44

make all the classes that are used Parecelable. Then override writeToParcel and create public static final Parcelable.Creator<YourClass> to read from parcel and create an object from your object.

But the simplest will be to use Serializable interface. reading and writing will be automatically handled.

score 0 · Answer 3 · edited Jul 21 '16 at 13:52

Use a pojo/setter getter class with the implementation of Parcelable .
```
public class MyData implements Parcelable
```
Declare the values in your pojo which will be an arraylist item
```
MyData data = new MyData("id", "text");
```

Call the parcelable method from the intent with your another activity.

Intent i = new Intent(this,MyActivity.class);
i.putExtra("key", data);
startActivity(i);

Get the list with parcelable method of that class intent,

MyData data = i.getExtras().getParcelable("key");
List<MyData> mList = new ArrayList<>();
mList.add(data);

Issue : Passing ArrayList between intents loses data

3 Answers3