通過Intent傳遞帶有arraylist的對象

Question

我希望Activity2通過Intent接收對象（此對象內部具有其他對象的ArrayList）。 轉讓對象：

public class Card implements Parcelable {

    @SerializedName("product_name")
    private String productName;
    private String description;
    private List<Price> prices;

    public Card() {
    }

    public Card(String productName, String description, List<Price> prices) {
        this.productName = productName;
        this.description = description;
        this.prices = prices;
    }

    protected Card(Parcel in) {
        productName = in.readString();
        description = in.readString();
    }


    public static final Creator<Card> CREATOR = new Creator<Card>() {
        @Override
        public Bundle createFromParcel(Parcel in) {
            return new Card(in);
        }

        @Override
        public Card[] newArray(int size) {
            return new Card[size];
        }
    };

    public String getProductName() {
        return productName;
    }

    public String getDescription() {
        return description;
    }

    public List<Price> getPrices() {
        return prices;
    }

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

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(productName);
        dest.writeString(description);
        dest.writeTypedList(prices);
    } }

意圖（在片段內部）：

Intent intent = new Intent(getActivity(), Activity2.class);
                        intent.putExtra(Activity2.ARG_BUNDLE, card);
                        startActivity(intent);

Activity2接收對象：

Intent intent = getIntent();
        if (intent != null) {
            bundle = intent.getParcelableExtra(ARG_BUNDLE);
        }

但是Activity2僅接收對象，而內部沒有Price的ArrayList（對象Price也實現了Parcelable）。 也許我做錯了什么？

Answer 1

您沒有在您的方法中讀取價格數組列表，應該是：

protected Card(Parcel in) {
        productName = in.readString();
        description = in.readString();
        prices= in.createTypedArrayList(Price.CREATOR); // add this line to your code.
    }

Answer 2

Intent i = getIntent();  
stock_list = i.getStringArrayListExtra("stock_list");

發送端

 Intent intent = new Intent(this, editList.class);
        intent.putStringArrayListExtra("stock_list", stock_list);
        startActivity(intent);