Question

我有一个类，其中有数组列表。如何通过意图发送它。以下我为我的班级做了

public class MakeOrder implements Parcelable {

@SerializedName("refno")
@Expose
private String refno;
@SerializedName("ddesc")
@Expose
private String ddesc;
@SerializedName("free")
@Expose
private String free;
@SerializedName("fgift")
@Expose
private String fgift;
@SerializedName("sgift")
@Expose
private String sgift;
@SerializedName("sandage")
@Expose
private SandageResponse sandage;
@SerializedName("inst")
@Expose
private String inst;
@SerializedName("items")
@Expose
private List<Item> items = new ArrayList<Item>();
@SerializedName("discount")
@Expose
private String discount;
@SerializedName("coupon")
@Expose
private Coupon coupon;
@SerializedName("delivery")
@Expose
private String delivery;
@SerializedName("user")
@Expose
private User user;
@SerializedName("otype")
@Expose
private String otype;
@SerializedName("ptype")
@Expose
private String ptype;
@SerializedName("app_id")
@Expose
private String appId;
@SerializedName("app_key")
@Expose
private String appKey;
@SerializedName("request")
@Expose
private String request;
@SerializedName("tablename")
@Expose
private String tablename;
@SerializedName("staff")
@Expose
private String staff;

public String getTablename() {
    return tablename;
}

public void setTablename(String tablename) {
    this.tablename = tablename;
}

public String getStaff() {
    return staff;
}

public void setStaff(String staff) {
    this.staff = staff;
}

public String getRefno() {
    return refno;
}

public void setRefno(String refno) {
    this.refno = refno;
}

public String getDdesc() {
    return ddesc;
}

public void setDdesc(String ddesc) {
    this.ddesc = ddesc;
}

public String getFree() {
    return free;
}

public void setFree(String free) {
    this.free = free;
}

public String getFgift() {
    return fgift;
}

public void setFgift(String fgift) {
    this.fgift = fgift;
}

public String getSgift() {
    return sgift;
}

public void setSgift(String sgift) {
    this.sgift = sgift;
}

public SandageResponse getSandage() {
    return sandage;
}

public void setSandage(SandageResponse sandage) {
    this.sandage = sandage;
}

public String getInst() {
    return inst;
}

public void setInst(String inst) {
    this.inst = inst;
}

public List<Item> getItems() {
    return items;
}

public void setItems(List<Item> items) {
    this.items = items;
}

public String getDiscount() {
    return discount;
}

public void setDiscount(String discount) {
    this.discount = discount;
}

public Coupon getCoupon() {
    return coupon;
}

public void setCoupon(Coupon coupon) {
    this.coupon = coupon;
}

public String getDelivery() {
    return delivery;
}

public void setDelivery(String delivery) {
    this.delivery = delivery;
}

public User getUser() {
    return user;
}

public void setUser(User user) {
    this.user = user;
}

public String getOtype() {
    return otype;
}

public void setOtype(String otype) {
    this.otype = otype;
}

public String getPtype() {
    return ptype;
}

public void setPtype(String ptype) {
    this.ptype = ptype;
}

public String getAppId() {
    return appId;
}

public void setAppId(String appId) {
    this.appId = appId;
}

public String getAppKey() {
    return appKey;
}

public void setAppKey(String appKey) {
    this.appKey = appKey;
}

public String getRequest() {
    return request;
}

public void setRequest(String request) {
    this.request = request;
}




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

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeString(this.refno);
    dest.writeString(this.ddesc);
    dest.writeString(this.free);
    dest.writeString(this.fgift);
    dest.writeString(this.sgift);
    dest.writeParcelable(this.sandage, flags);
    dest.writeString(this.inst);
    dest.writeTypedList(this.items);
    dest.writeString(this.discount);
    dest.writeParcelable(this.coupon, flags);
    dest.writeString(this.delivery);
    dest.writeParcelable(this.user, flags);
    dest.writeString(this.otype);
    dest.writeString(this.ptype);
    dest.writeString(this.appId);
    dest.writeString(this.appKey);
    dest.writeString(this.request);
    dest.writeString(this.tablename);
    dest.writeString(this.staff);
}

public MakeOrder() {
}

protected MakeOrder(Parcel in) {
    this.refno = in.readString();
    this.ddesc = in.readString();
    this.free = in.readString();
    this.fgift = in.readString();
    this.sgift = in.readString();
    this.sandage = in.readParcelable(SandageResponse.class.getClassLoader());
    this.inst = in.readString();
    this.items = in.createTypedArrayList(Item.CREATOR);
    this.discount = in.readString();
    this.coupon = in.readParcelable(Coupon.class.getClassLoader());
    this.delivery = in.readString();
    this.user = in.readParcelable(User.class.getClassLoader());
    this.otype = in.readString();
    this.ptype = in.readString();
    this.appId = in.readString();
    this.appKey = in.readString();
    this.request = in.readString();
    this.tablename = in.readString();
    this.staff = in.readString();
}

public static final Parcelable.Creator<MakeOrder> CREATOR = new Parcelable.Creator<MakeOrder>() {
    @Override
    public MakeOrder createFromParcel(Parcel source) {
        return new MakeOrder(source);
    }

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

请查看更新的 我收到错误消息，例如无法编组值 我做了所有类Parcelable。如何通过意图发送其对象 提前致谢

Logcat就像

java.lang.RuntimeException: Parcel: unable to marshal value    Models.PlaceOrder.Sub@41e10f80
at android.os.Parcel.writeValue(Parcel.java:1235)
at android.os.Parcel.writeList(Parcel.java:622)
at Models.PlaceOrder.Item.writeToParcel(Item.java:90)
at android.os.Parcel.writeTypedList(Parcel.java:1017)
at Models.PlaceOrder.MakeOrder.writeToParcel(MakeOrder.java:246)
at android.os.Parcel.writeParcelable(Parcel.java:1254)
at android.os.Parcel.writeValue(Parcel.java:1173)
at android.os.Parcel.writeMapInternal(Parcel.java:591)
at android.os.Bundle.writeToParcel(Bundle.java:1627)
at android.os.Parcel.writeBundle(Parcel.java:605)
at android.content.Intent.writeToParcel(Intent.java:6866)
at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:1897)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1418)
at android.app.Activity.internalStartActivityForResult(Activity.java:3427)
at android.app.Activity.access$200(Activity.java:660)
at android.app.Activity$2.onStartActivity(Activity.java:3417)
at android.app.Activity.startActivityForBusiness(Activity.java:5441)
at android.app.Activity.startActivityForResult(Activity.java:3413)
at android.support.v4.app.BaseFragmentActivityJB.startActivityForResult(BaseFragmentActivityJB.java:48)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:75)
at android.app.Activity.startActivityForResult(Activity.java:3367)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:871)
at android.app.Activity.startActivity(Activity.java:3644)
at android.app.Activity.startActivity(Activity.java:3612)

Items.java 获取异常

public class Item implements Parcelable {

@SerializedName("itemid")
@Expose
private String itemid;
@SerializedName("qty")
@Expose
private String qty;
@SerializedName("sub")
@Expose
private List<Sub> sub = new ArrayList<Sub>();

/**
 *
 * @return
 * The itemid
 */
public String getItemid() {
    return itemid;
}

/**
 *
 * @param itemid
 * The itemid
 */
public void setItemid(String itemid) {
    this.itemid = itemid;
}

/**
 *
 * @return
 * The qty
 */
public String getQty() {
    return qty;
}

/**
 *
 * @param qty
 * The qty
 */
public void setQty(String qty) {
    this.qty = qty;
}

/**
 *
 * @return
 * The sub
 */
public List<Sub> getSub() {
    return sub;
}

/**
 *
 * @param sub
 * The sub
 */
public void setSub(List<Sub> sub) {
    this.sub = sub;
}

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

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeString(this.itemid);
    dest.writeString(this.qty);
    dest.writeList(this.sub);
}

public Item() {
}

protected Item(Parcel in) {
    this.itemid = in.readString();
    this.qty = in.readString();
    this.sub = new ArrayList<Sub>();
    in.readList(this.sub, Sub.class.getClassLoader());
}

public static final Parcelable.Creator<Item> CREATOR = new Parcelable.Creator<Item>() {
    @Override
    public Item createFromParcel(Parcel source) {
        return new Item(source);
    }

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

Answer 1

您还需要在项目和优惠券对象中实施Parcelable 。

然后当您在MakeOrder类中添加并阅读列表时：

@Override
public void writeToParcel(Parcel dest, int flags) {
    ...
    // to write the Item list
    dest.writeList(items);
    // to write Coupon object
    dest.writeParcelable(coupon, falgs);
}

BTW，你的构造函数是空的

private MakeOrder(Parcel in) {
    ...
    // to read the Item list
    items = new ArrayList<Item>();
    in.readList(items, Item.CREATOR);
    // to read Coupon object
    in.readParcelable(Coupon.CREATOR);
}

此链接可以帮助您：

How to make a class with nested objects Parcelable

这是Parcelable文档：

https://developer.android.com/reference/android/os/Parcel.html

修改

问题中添加了更多Percel问题。

聊天中的最终解决方案：http://chat.stackoverflow.com/rooms/123710/discussion-between-aman-singh-and-adalpari

Answer 2

你需要加入这样的额外内容：

Intent intent-new Intent(this,YouActvity.class);
        intent.putExtra("key",yourModel);
        startActivity(intent);

在要回溯的活动中：

YouModel yourModel = (YourModel) getIntent().getSerializableExtra("key");

Answer 3

尝试使用此

  intent.putParcelableArrayListExtra("value", orderList);

在其他活动中将其视为：

  List<String> orderList=this.getIntent().
           getParcelableArrayListExtra("value");

希望这有帮助

Answer 4

首先，您的Parcelable构造函数为空。如果你把它留空，那它就不会起作用。您需要以与writeToParcel()方法中编写的顺序相同的方式读取parcel中的字段。

然后将parcelable数据写入意图的putExtra()方法。要从意图中提取数据，请使用意图

的getParcelableExtra()方法

如何通过实现parcable通过intent发送类对象。无法编组值错误

4 个答案: