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Android 如何通过实现parcable通过intent发送类对象。无法封送值错误_Android_Object_Android Intent_Parcelable - Fatal编程技术网

Android 如何通过实现parcable通过intent发送类对象。无法封送值错误

Android 如何通过实现parcable通过intent发送类对象。无法封送值错误,android,object,android-intent,parcelable,Android,Object,Android Intent,Parcelable,我有一个类,其中有数组列表。如何通过意图发送它。接下来我为我的班级做了什么 public class MakeOrder implements Parcelable { @SerializedName("refno") @Expose private String refno; @SerializedName("ddesc") @Expose private String ddesc; @SerializedName("free") @Expose private String free; @

我有一个类,其中有数组列表。如何通过意图发送它。接下来我为我的班级做了什么

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];
    }
};
}
Items.java在何处获取异常

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];
    }
};
}
公共类项实现可包裹{
@SerializedName(“itemid”)
@暴露
私有字符串itemid;
@序列化名称(“数量”)
@暴露
私有字符串数量;
@序列化名称(“子”)
@暴露
private List sub=new ArrayList();
/**
*
*@返回
*项目ID
*/
公共字符串getItemid(){
返回itemid;
}
/**
*
*@param itemid
*项目ID
*/
公共void setItemid(字符串itemid){
this.itemid=itemid;
}
/**
*
*@返回
*数量
*/
公共字符串getQty(){
退货数量;
}
/**
*
*@param数量
*数量
*/
公共作废设置数量(字符串数量){
该数量=数量;
}
/**
*
*@返回
*潜艇
*/
公共列表getSub(){
返回子节点;
}
/**
*
*@param sub
*潜艇
*/
公共无效设置子项(列表子项){
this.sub=sub;
}
@凌驾
公共int描述内容(){
返回0;
}
@凌驾
公共无效写入包裹(包裹目的地,内部标志){
dest.writeString(this.itemid);
目的写入(该数量);
目的地书面清单(本文件);
}
公共项目(){
}
受保护物品(包裹中){
this.itemid=in.readString();
this.qty=in.readString();
this.sub=新的ArrayList();
in.readList(this.sub,sub.class.getClassLoader());
}
public static final Parcelable.Creator=新建Parcelable.Creator(){
@凌驾
公共项目createFromParcel(地块源){
返回新项目(来源);
}
@凌驾
公共项[]新数组(整数大小){
返回新项目[大小];
}
};
}
尝试使用此

  intent.putParcelableArrayListExtra("value", orderList);
在其他活动中,可将其作为:

  List<String> orderList=this.getIntent().
           getParcelableArrayListExtra("value");
List orderList=this.getIntent()。
getParcelableArrayListExtra(“价值”);

希望这有助于您需要在物品和优惠券对象中实现Parcelable

然后,在MakeOrder类中添加并读取列表时:

@Override
public void writeToParcel(Parcel dest, int flags) {
    ...
    // to write the Item list
    dest.writeList(items);
    // to write Coupon object
    dest.writeParcelable(coupon, falgs);
}
顺便说一句,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);
}
private MakeOrder(包裹中){
...
//阅读项目列表
items=newarraylist();
in.readList(items,Item.CREATOR);
//读取优惠券对象的步骤
in.readParcelable(优惠券.CREATOR);
}
此链接可以帮助您:

这是可包裹的文件:

编辑:

where more Percel问题增加了这个问题


聊天中的最终解决方案:

首先,您的
包裹
构造函数为空。如果你让它空着,它就不会工作了。您需要按照在
writeToParcel()
method中写入字段的顺序读取包裹中的字段


然后,要将可打包的数据写入intent,请使用intent的方法。要从intent提取数据,请使用intent的
getParcelableExtra()
方法

您需要添加如下额外内容:

Intent intent-new Intent(this,YouActvity.class);
        intent.putExtra("key",yourModel);
        startActivity(intent);
在要检索的活动中:

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

你的答案不是关于Parcelable,而是关于Serializable谢谢你告诉我这个错误,我已经改变了我的答案,这样你就可以直接将列表添加到意图中,即对象内部。如果你想传递整个对象,这不是很好的结构。它是空的,因为我无法找到包裹列表值的方法。好的,试试这个解决方案,告诉我它是否对你有帮助。什么是其他对象,如优惠券如何发送它,我需要使优惠券类也包裹。(Y) 现在让我检查所有。我完成了所有操作,但遇到异常,如无法封送值。现在有什么问题?实际上我的问题是如何传递列表项?你能发布完整的日志吗?错误行?请现在检查,我更新了Item.java第90行的问题是什么?这是他的错误。无论如何,这不是一个问题被问到的方式。首先你问了一些问题,在我们解决它之后,你改变了所有的问题,而不是添加新的问题(标题、代码)。现在给出的答案毫无意义..哎呀!!!你是ryt。那是我的错误
YouModel yourModel = (YourModel) getIntent().getSerializableExtra("key");