Android passing an arraylist back to parent activity

I've been searching for a simple example of this with no luck.

In my android application I have two activities: 1. The main activity which is launched at startup 2. A second activity which is launched by pressing a button on the main activty.

When the second activity is finished (by pressing a button) I want it to send back an ArrayList of type MyObject to the main activity and close itself, which the main activity can then do whatever with it. How would I go about achieving this? I have been trying a few things but it is crashing my application when I start the second activity.

When the user presses button to launch second activity:

            Intent i = new Intent(MainActivity.this, secondactivity.class);
            startActivityForResult(i, 1);

The array which is bundled back after pressing a button on the second activity:

Intent intent= getIntent();
                    Bundle b = new Bundle();
                    b.putParcelableArrayList("myarraylist", mylist);
                    intent.putExtras(b);
                    setResult(RESULT_OK, intent);
                    finish();

And finally a listener on the main activity (although I'm not sure of 100% when this code launches...)

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
          super.onActivityResult(requestCode, resultCode, data);
          if(resultCode==RESULT_OK && requestCode==1){
        Bundle extras = data.getExtras();

        final ArrayList<MyObject> mylist = extras.getParcelableArrayList("myarraylist");
        Toast.makeText(MainActivity.this, mylist.get(0).getName(), Toast.LENGTH_SHORT).show();
    }
}

Any ideas where I am going wrong? The onActivityResult() seems to be crashing my application.

EDIT: Class with parcelable methods:

import android.os.Parcel;
import android.os.Parcelable;

public class Plan implements Parcelable{
    private String name;
    private String id;

    public Plan(){
    }

    public Plan createFromParcel(Parcel in) {
        Plan plan = new Plan();
        plan.setId(in.readString());
        plan.setName(in.readString());
        return plan;
}

    public Plan(String name, String id){
        this.name = name;
        this.id = id;
    }


    public String getName(){
        return name;
    }
    pub开发者_StackOverflow中文版lic void setName(String name){
        this.name = name;
    }
    public String getId(){
        return id;
    }
    public void setId(String id){
        this.id = id;
    }

    public String toString(){
        return "Plan ID: " + id + " Plan Name: " + name;
    }

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

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(id);
        dest.writeString(name);
    }

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

        @Override
        public Plan[] newArray(int size) {
            // TODO Auto-generated method stub
            return new Plan[size];
        }

    };

}

After the second activity finished, onactivityresult is called, but nothing displays inside the toast, its blank. any ideas? I'm guessing my class is still messed up...

EDIT: got it to work

I had the method that Peter supplied in the wrong place. It should be inside creator, like this:

public static final Parcelable.Creator<Plan> CREATOR
= new Parcelable.Creator<Plan>() {
    public Plan createFromParcel(Parcel in) {
        Plan plan = new Plan();
        plan.setId(in.readString());
        plan.setName(in.readString());
        return plan;
}

and not out on its own.

Many thanks to Peter! Hope this helps someone else.

Your class MyObject must implement Parcelable in order to be serialized/deserialized by Android when put inside Bundle.

Update:

The method name is createFromParcel. And actually you have to create your object Plan from data in the parcel:

public Plan createFromParcel(Parcel in) {
        Plan plan = new Plan();
        plan.setId(in.readString());
        plan.setName(in.readString());
        return plan;
}