[안드로이드] Activity 간 객체 전달 방법(Parcelable)

Activity 간 객체 전달 방법

Parcel을 이용한 객체를 전달하는 방법을 통해 

1. 전달하고자 하는 객체 클래스를 Parcelable 인터페이스를 구현한다.

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

public class CategoryItem implements Parcelable {
	public String URL;
	public String Subject;
	
	@Override
	public int describeContents() {
		// TODO Auto-generated method stub
		return 0;
	}

	@Override
	public void writeToParcel(Parcel arg0, int arg1) {
		// TODO Auto-generated method stub
		arg0.writeString(URL);
		arg0.writeString(Subject);
	}
	
	public static final Parcelable.Creator CREATOR = new Creator() {
        public CategoryItem createFromParcel(Parcel source) {
            CategoryItem category   = new CategoryItem();
            category.URL = source.readString();
            category.Subject = source.readString();
            return category;
        }
        public CategoryItem[] newArray(int size) {
            return new CategoryItem[size];
        }
    };
}

전달시

Intent intent = new Intent(this, AllCategoryActivity.class);
        
intent.putParcelableArrayListExtra("GetCategoryItem", mAllCategory);
startActivity(intent);    

사용시

Bundle bundle = getIntent().getExtras();
mAllCategory = bundle.getParcelableArrayList("GetCategoryItem");