How to pass ArrayList<Custom_Object> from one activity to another in Android?

Question

I am trying to send a custom object from one activity to another activity, but it's crashing when I call the start activity.

Below is the snippet I used.

My Activity implements Serializable

ArrayList<CUSTOM_OBJECT> Cus_Obje_arraylist = new ArrayList<CUSTOM_OBJECT>();

Here is my intent :

Intent inte = new Intent(getApplicationContext(), ListActivity.class); `
inte.putExtra("list",Cus_Obje_arraylist);`
startActivity(inte);

Please let me know why it's crashing or what alternate way I can use?

TieDad · Accepted Answer · 2012-11-30 01:57:20Z

7

I can give a suggestion. I do this in my project.

1.Implement a singleton class as the bridge to pass object. (Hopefully you know what's singleton, I you don't, add comment to tell me.

class BridgeClass {
    private BridgeClass() {}

    static BridgeClass obj = nil;
    public BridgeClass instance() {
         if (obj == nil) obj = new BridgeClass();
         return obj;
    }

    public ArrayList<CUSTOM_OBJECT> cache;
 }

2.In the from activity,

BridgeClass.instance().cache = Cus_Obje_arraylist;

3.Then in the to activity, you can get it from the bridge class.

ArrayList<CUSTOM_OBJECT> Cus_Obje_arraylist = BridgeClass.instance().cache;

edited Nov 30, 2012 at 1:57

answered Nov 30, 2012 at 1:27

TieDad

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4 Comments

Dinesh Over a year ago

iam not clear, do i need to create a dummy class to hold this value? - Plz explain in detail.

Dinesh Over a year ago

Thanks it worked .. Is there any other way in which i can pass via intent

TieDad Over a year ago

If it works for you, please adapt and up vote my answer, so that I get reputation. Thanks.

TieDad Over a year ago

I think at least you can accept the answer that not require your rep.

allsoft · Accepted Answer · 2012-11-30 01:39:09Z

0

You need to create the Parcelable object to pass the custom array list from one activity to the another actvity.

Then put it into the Bundle object using the this api.

putParcelableArrayList(key, value);
getParcelableArrayList(key);

=== Sender ===

ArrayList<Custom> ar = new ArrayList<Custom>();
Bundle bundle = new Bundle("test");

bundle.putParcelableArrayList("key", ar);
Intent intent = new Intent(this, anotherActivity.class);
intent.putBundle(bundle);

=== Receiver ===

Bundle bundle = getIntent().getBundleExtra("test");
ArrayList<Custom> ar = bundle.getParcelableArrayList("key");

If you have any question, comment it.

answered Nov 30, 2012 at 1:39

allsoft

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4 Comments

Dinesh Over a year ago

The definition of the object is from a library, so i will not be able to change that as Parcelable.

allsoft Over a year ago

What i'm saying is that you need to create the inherited Custom object by implementing the Parcelable object. Try search the Parcelable object in the google.

Dinesh Over a year ago

Hi Can you plz send sample code that you have come across for this?

allsoft Over a year ago

stackoverflow.com/questions/6681217/…

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