Intent.putExtra List [duplicate]

Answer 1

Assuming that your List is a list of strings make data an ArrayList<String> and use intent.putStringArrayListExtra("data", data)

Here is a skeleton of the code you need:

1. Declare List

   private List<String> test;
   

2. Init List at appropriate place

   test = new ArrayList<String>();
   

   and add data as appropriate to test.

3. Pass to intent as follows:

   Intent intent = getIntent();  
   intent.putStringArrayListExtra("test", (ArrayList<String>) test);
   

4. Retrieve data as follows:

   ArrayList<String> test = getIntent().getStringArrayListExtra("test");
   

Hope that helps.

Answer 2

 //To send from the activity that is calling another activity via myIntent

    myIntent.putExtra("id","10");
    startActivity(myIntent);

    //To receive from another Activity

            Bundle bundle = getIntent().getExtras();
            String id=bundle.getString("id");

Answer 3

If you use ArrayList instead of list then also your problem wil be solved. In your code only modify List into ArrayList.

private List<Item> data;

Answer 4

you can do it in two ways using

• Serializable

• Parcelable.

This examle will show you how to implement it with serializable

class Customer implements Serializable
{
   // properties, getter setters & constructor
}

// This is your custom object
Customer customer = new Customer(name, address, zip);

Intent intent = new Intent();
intent.setClass(SourceActivity.this, TargetActivity.this);
intent.putExtra("customer", customer);
startActivity(intent);

// Now in your TargetActivity
Bundle extras = getIntent().getExtras();
if (extras != null)
{
    Customer customer = (Customer)extras.getSerializable("customer");
    // do something with the customer
}

Now have a look at this. This link will give you a brief overview of how to implement it with Parcelable.

Look at this.. This discussion will let you know which is much better way to implement it.

Thanks.