개체 목록이 포함 된 구획 가능 개체를 전달하는 방법은 무엇입니까?

개체 목록이 포함 된 구획 가능 개체를 전달하는 방법은 무엇입니까?

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Parcelable아래 에 개체를 만들었습니다. 개체에 List의 제품이 포함되어 있습니다 . 내 생성자에서 어떻게 처리하나요 다시 만드는 내를 Parcelable위해 List?

소포에서 사용할 수있는 모든 방법을 확인했으며 사용할 수있는 모든 방법은 readArrayList(ClassLoader)입니다. 이것이 최선의 접근 방식인지 잘 모르겠습니다. 귀하의 조언은 정말 감사하겠습니다.

public class Outfits implements Parcelable {

    private String url;
    private String name;
    private List<Product> products;

    public String getUrl() {
        return url;
    }
    public void setUrl(String url) {
        this.url = url;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public List<Product> getProducts() {
        return products;
    }
    public void setProducts(List<Product> products) {
        this.products = products;
    }

    public void writeToParcel(Parcel dest, int flags) {
        Log.v("", "writeToParcel..." + flags);
        dest.writeString(url);
        dest.writeString(name);
        dest.writeList(products);
    }


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

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

    @Override
    public int describeContents() {
        return 0;
    }

    /*** Here how do I populate my List of Products ***/
    private Outfits(Parcel in) {
        url = in.readString();
        name = in.readString();
        products = in.read ???????;
    }
}

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클래스 Product가 Parcelable 프로토콜과 호환되는 경우 문서에 따라 다음과 같이 작동해야합니다.

products = new ArrayList<Product>();
in.readList(products, Product.class.getClassLoader());

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먼저 Product 객체는 Parcelable.

그리고, 사용 dest.writeTypedList(products)의 writeToParcel()방법.

마지막으로 다음 코드를 사용하여 목록을 구문 분석합니다.

products = new ArrayList<Product>();
in.readTypedList(products, Product.CREATOR);

자세한 내용은 공식 문서 를 참조하십시오 .

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이것은 작동합니다.

in.readTypedList(products, Product.CREATOR);

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In my personal experience, http://www.parcelabler.com/ is an amazing site for this. You just create your class, and copy paste it into the website, and it generates a Parcelable version of your class.

I tested it with a class named "Theme" that contained the following variables:

private String name;
private int image;
private List<Card> cards;

The writeToParcel function becomes:

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeString(name);
    dest.writeInt(image);
    if (cards == null) {
        dest.writeByte((byte) (0x00));
    } else {
        dest.writeByte((byte) (0x01));
        dest.writeList(cards);
    }
}

generated constructor:

protected Theme(Parcel in) {
    name = in.readString();
    image = in.readInt();
    if (in.readByte() == 0x01) {
        cards = new ArrayList<Card>();
        in.readList(cards, Card.class.getClassLoader());
    } else {
        cards = null;
    }
}

EDIT: make sure that the Card object is also Parcelable!

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implement Parcelable on the Product class as well and then

in.readList(this.list, Product.class.getClassLoader());

if any of the above solutions didn't work.

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The other way is to use readValue&writeValue.

protected Product (Parcel in) {
        ...
        in.readValue(this.getClass().getClassLoader());
    }

@Override
public void writeToParcel(Parcel parcel, int i) {
    ...
    parcel.writeValue(**list**);
}

Items of the list should implement Parcelable

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Here you go...

Make sure "Products.java" should be extended with Parcelable

Step 1:

 private List<Products> products; 

Step 2:

private Outfits(Parcel in) {
    products = in.createTypedArrayList(Products.CREATOR);
}

Step 3:

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeTypedList(products);
    }

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Assuming the Product is implementing Parcelable, you can use this for writing:

dest.writeValue(products);

and this for reading:

products = (List<Product>) in.readValue(Product.class.getClassLoader());

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Product must be implements Parcelable

  Product class implements  Parcelable {
          ......
  }

Then write you object contains list like

public class Outfits implements Parcelable {

     private String url;
     private String name;
     private List<Product> products;

     public Outfits (Parcel pi) {

        bookName = p.readString();
        bookId = p.readInt();
        isColor = p.readInt() == 1;

        //use this well be get err
        //products=p.readArrayList(Thread.currentThread().getContextClassLoader());

        //Pass list use this 
        products= in.createTypedArrayList(Product.CREATOR);

      }

            ...get and set...

     public void writeToParcel(Parcel dest, int flags) {


        dest.writeString(url);
        dest.writeString(name);

        //use this will no working
        //dest.writeList(products);

        //Parcelable list
        out.writeTypedList(products);

     }

 }

참고URL : https://stackoverflow.com/questions/6300608/how-to-pass-a-parcelable-object-that-contains-a-list-of-objects