我正在嘗試將自定義對象從一個活動傳遞到另一個活動。我發現我們可以使用 bundle 將數據傳遞到 Intent 中，并且我們需要在我們的類中實現一個 Parcelable 接口。在下面的代碼中，我刪除了無用的東西。public class TravelCard implements Parcelable {public static final Creator<TravelCard> CREATOR = new Creator<TravelCard>() {    @Override    public TravelCard createFromParcel(Parcel in) {        return new TravelCard(in);    }    @Override    public TravelCard[] newArray(int size) {        return new TravelCard[size];    }};private String travelTitle, travelCountry, dateRange, numOfPerson;private List<TravelDay> days;protected TravelCard(Parcel in) {    travelTitle = in.readString();    travelCountry = in.readString();    dateRange = in.readString();    numOfPerson = in.readString();    in.readTypedList(days, TravelDay.CREATOR);}@Overridepublic int describeContents() {    return 0;}@Overridepublic void writeToParcel(Parcel dest, int flags) {    dest.writeString(this.travelTitle);    dest.writeString(this.travelCountry);    dest.writeString(this.dateRange);    dest.writeString(this.numOfPerson);    dest.writeTypedList(this.days);}在這個類中，我有另一個自定義對象的列表：public class TravelDay implements Parcelable {public static final Creator<TravelDay> CREATOR = new Creator<TravelDay>() {    @Override    public TravelDay createFromParcel(Parcel in) {        return new TravelDay(in);    }    @Override    public TravelDay[] newArray(int size) {        return new TravelDay[size];    }};public int current_day;private String title, note, dateOfToday;protected TravelDay(Parcel in) {    title = in.readString();    note = in.readString();    dateOfToday = in.readString();    current_day = in.readInt();}@Overridepublic int describeContents() {    return 0;}@Overridepublic void writeToParcel(Parcel dest, int flags) {    dest.writeString(title);    dest.writeString(note);    dest.writeString(dateOfToday);    dest.writeInt(current_day);}我認為直到這里一切都應該沒問題。