java - 将 Parcelable 对象传递给新 Activity 返回 null

Question

我正在将可分割数据类的对象传递给简单字符串的 Activity 我可以将其放入 Intent 中并将其传递给另一个 Activity ，但是当我在对象中输入新的字符串列表时，该对象(现在包括列表)不会传递给其他 Activity 。

这是我的数据类”

package com.example.user.shoppy.models;

import android.os.Parcel;
import android.os.Parcelable;
import android.support.annotation.NonNull;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;


public class ProductModel implements Parcelable {

String product_name, description, price, currency, location, userId, image, 
product_Id,featuredImage;

List<String> imagesNames;

public ProductModel() {
}



// this constructor is getting all the string variables
public ProductModel(String product_Id, String product_name, String description, String price, String currency, String userId, String location) {
    this.product_name = product_name;
    this.description = description;
    this.price = price;
    this.currency = currency;
    this.location = location;
    this.userId = userId;
    this.product_Id = product_Id;
}
// this constructor is getting all the string variables but also an list 
public ProductModel(String product_id, String product_name, String des, String price, String currency, String userId, String location, String featuredImage, List imagesNames) {
    this.product_name = product_name;
    this.description = des;
    this.price = price;
    this.currency = currency;
    this.location = location;
    this.userId = userId;
    this.product_Id = product_id;
    this.featuredImage = featuredImage;
    this.imagesNames = imagesNames;
}


public String getProduct_Id() {
    return product_Id;
}

public void setProduct_Id(String product_Id) {
    this.product_Id = product_Id;
}

public String getImage() {
    return image;
}

public void setImage(String image) {
    this.image = image;
}

public String getUserId() {
    return userId;
}

public void setUserId(String userId) {
    this.userId = userId;
}

public String getProduct_name() {
    return product_name;
}

public void setProduct_name(String product_name) {
    this.product_name = product_name;
}

public String getDescription() {
    return description;
}

public void setDescription(String description) {
    this.description = description;
}

public String getPrice() {
    return price;
}

public void setPrice(String price) {
    this.price = price;
}

public String getCurrency() {
    return currency;
}

public void setCurrency(String currency) {
    this.currency = currency;
}

public String getLocation() {
    return location;
}

public void setLocation(String location) {
    this.location = location;
}

public String getFeaturedImage() {        return featuredImage;    }

public void setFeaturedImage(String featuredImage) {        this.featuredImage = featuredImage;    }

public List<String> getImagesNames() {        return imagesNames;    }

public void setImagesNames(List<String> imagesNames) {        this.imagesNames = imagesNames;    }

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

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeString(description);
    dest.writeString(product_name);
    dest.writeString(price);
    dest.writeString(currency);
    dest.writeString(location);
    dest.writeString(userId);
    dest.writeString(image);
    dest.writeString(product_Id);
    dest.writeString(featuredImage);
    dest.writeStringList(imagesNames);
}

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

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

private ProductModel(@NonNull Parcel in) {
    description = in.readString();
    product_name = in.readString();
    price = in.readString();
    currency = in.readString();
    location = in.readString();
    userId = in.readString();
    image = in.readString();
    product_Id = in.readString();
    featuredImage=in.readString();
    in.readList(imagesNames,String.class.getClassLoader());
}
}

这里是剩余的代码:

  @Override
        public void onClick(View v) {

             Intent intent = new Intent(mContext, ProductSellingActivity.class);
            intent.putExtra("currentProductModel", currentProductModel);
            mContext.startActivity(intent);


        }
    });

现在我的意向接收类(class)

 Intent intent=getIntent();
    currentProductModel= (ProductModel) intent.getParcelableExtra(ProductSellingActivity.INTENTNAME);

Answer 1

在第二个 Activity key 中接收 Intent 时应该相同。

Intent intent=getIntent();
currentProductModel= (ProductModel) intent.getParcelableExtra("currentProductModel");

试试这个。