How to pass ArrayList<CustomeObject> from one activity to another? [duplicate]

Question

I want to send Following ArrayList from one activity to another please help.

ContactBean m_objUserDetails = new ContactBean();
ArrayList<ContactBean> ContactLis = new ArrayList<ContactBean>(); 

I am sending the above arraylist after adding data in it as follows

  Intent i = new Intent(this,DisplayContact.class);
  i.putExtra("Contact_list", ContactLis);
  startActivity(i);

But I am getting problem while recovering it.

ArrayList<ContactBean> l1 = new ArrayList<ContactBean>();
Bundle wrapedReceivedList = getIntent().getExtras();
l1= wrapedReceivedList.getCharSequenceArrayList("Contact_list");

At this point I am getting this error:

Type mismatch: cannot convert from ArrayList<CharSequence> to ArrayList<ContactBean>

My ContactBean class implements Serializable please also tell why we have to implement serializable interface.

Anzac

#15790999 – Marci

make your custom Object Parcelable. – Frugivorous

Accepted answer copied from stackoverflow.com/a/11340842 – Genuflect

Answer 1

In First activity:

ArrayList<ContactBean> fileList = new ArrayList<ContactBean>();
Intent intent = new Intent(MainActivity.this, secondActivity.class);
intent.putExtra("FILES_TO_SEND", fileList);
startActivity(intent);

In receiver activity:

ArrayList<ContactBean> filelist =  (ArrayList<ContactBean>)getIntent().getSerializableExtra("FILES_TO_SEND");`

Propraetor

it does not seem to working , my app is keep crashing – Sassoon

Answer 2

you need implements Parcelable in your ContactBean class, I put one example for you:

public class ContactClass implements Parcelable {

private String id;
private String photo;
private String firstname;
private String lastname;

public ContactClass()
{

}

private ContactClass(Parcel in) {
    firstname = in.readString();
    lastname = in.readString();
    photo = in.readString();
    id = in.readString();

}

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

@Override
public void writeToParcel(Parcel dest, int flags) {

    dest.writeString(firstname);
    dest.writeString(lastname);
    dest.writeString(photo);
    dest.writeString(id);

}

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

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

        }
    };

   // all get , set method 
 }

and this get and set for your code:

Intent intent = new Intent(this,DisplayContact.class);
intent.putExtra("Contact_list", ContactLis);
startActivity(intent);

second class:

ArrayList<ContactClass> myList = getIntent().getParcelableExtra("Contact_list");

Cascara

I am sure you meant: ArrayList<ContactClass> myList instead of ArrayList<String> myList – Hochstetler

yes you right @Hochstetler thanks for help – Cascara

I have never used Parcelable. but as I have come to know Parcelable is 10 times faster than serializable, will look forward to use parcelable. I have getter setter methods in my ContactBean class which I simply use to store data in class variables after making its object and then I am adding that object to ArrayList<ContactBean>. is this possible if the class is parcelable. – Anzac

sorry, i don't get your mean, but if i want tell you simple, you need both above method and getter and setter method.i edit my class – Cascara

ok thanks. Will definitely try it out. – Anzac

@VarunKarhadkar yes is possible , if is not possible then why we use that? sorry i'm busy first time don't get your mean. – Cascara

@Dev i need see your code, because this code working fine, if you can't fix problem answer new question and notify me – Cascara

in second activity how to i set value in textview ? @ShayanPourvatan – Chemo

@Chemo what is your mean? set it as normally, you've got your object, now you can set it with setText method with your property that you need. – Cascara

ok i'll use this code ArrayList<Pojo> myList = new ArrayList<Pojo>(); Intent intent = new Intent(getApplication(), SubCategoryData.class); intent.putExtra("SubCategory",myList); startActivity(intent); but myList size is 0 @ShayanPourvatan – Chemo

this is not related to this post, you can ask another question. – Cascara

Answer 3

Use this code to pass arraylist<customobj> to anthother Activity

firstly serialize our contact bean

public class ContactBean implements Serializable {
      //do intialization here
}

Now pass your arraylist

 Intent intent = new Intent(this,name of activity.class);
 contactBean=(ConactBean)_arraylist.get(position);
 intent.putExtra("contactBeanObj",conactBean);
 _activity.startActivity(intent);

Marcela

how to i set value in textView ?? – Chemo

which value???? – Marcela

aaraylist in next activity – Chemo

are u wanna set whole arraylist data to textview ? – Marcela

no some fields.. – Chemo