Passing a List from one Activity to another

You can pass an ArrayList<E> 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");

Please note that serialization can cause performance issues: it takes time, and a lot of objects will be allocated (and thus, have to be garbage collected).

First you need to create a Parcelable object class, see the example

public class Student implements Parcelable {

        int id;
        String name;

        public Student(int id, String name) {
            this.id = id;
            this.name = name;

        }

        public int getId() {
            return id;
        }

        public String getName() {
            return name;
        }


        @Override
        public int describeContents() {
            // TODO Auto-generated method stub
            return 0;
        }

        @Override
        public void writeToParcel(Parcel dest, int arg1) {
            // TODO Auto-generated method stub
            dest.writeInt(id);
            dest.writeString(name);
        }

        public Student(Parcel in) {
            id = in.readInt();
            name = in.readString();
        }

        public static final Parcelable.Creator<Student> CREATOR = new Parcelable.Creator<Student>() {
            public Student createFromParcel(Parcel in) {
                return new Student(in);
            }

            public Student[] newArray(int size) {
                return new Student[size];
            }
        };
    }

And the list

ArrayList<Student> arraylist = new ArrayList<Student>();

Code from Calling activity

Intent intent = new Intent(this, SecondActivity.class);
Bundle bundle = new Bundle();
bundle.putParcelableArrayList("mylist", arraylist);
intent.putExtras(bundle);       
this.startActivity(intent);

Code on called activity

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_second);   

    Bundle bundle = getIntent().getExtras();
    ArrayList<Student> arraylist = bundle.getParcelableArrayList("mylist");
}

use putExtra to pass value to an intent. use getSerializableExtra method to retrieve the data like this

Activity A :

ArrayList<String> list = new ArrayList<String>();

intent.putExtra("arraylist", list);
startActivity(intent);

Activity B:

ArrayList<String> list = getIntent().getSerializableExtra("arraylist");

I tried all the proposed techniques but none of them worked and stopped my app from working and then I finally succedded. Here is how I did it... In main activity I did this:

            List<String> myList...;
            Intent intent = new Intent...;
            Bundle b=new Bundle();
            b.putStringArrayList("KEY",(ArrayList<String>)myList);            
            intent_deviceList.putExtras(b);
            ....startActivity(intent);

To get the data in the new Activity:

    List<String> myList...
    Bundle b = getIntent().getExtras();
    if (b != null) {
        myList = bundle.getStringArrayList("KEY");
    }

I hope this will help someone...