如何将 ParcelableArrayList 从片段传递到片段?

Question

我一直在尝试找到将ParcelableArrayList从一个片段传递到另一个片段的方法，由于某种原因，当我收到ParcelableArrayList时，它是空的。我已经检查了很多关于这个问题的帖子，但我没有让它工作。

这是我的活动，它将片段保存在框架布局中：

package com.blumonpay.restaurant.customer.presentation.activities;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import android.os.Bundle;
import android.view.WindowManager;
import com.blumonpay.android.mifel.restaurante.R;
import com.blumonpay.restaurant.customer.presentation.fragments.ShowPayMethodsFragment;
public class PayMethodsActivity extends AppCompatActivity {
private Fragment showFragment;
private Fragment addFragment;


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN);
setContentView(R.layout.activity_pay_methods);
showFragment = ShowPayMethodsFragment.getInstance(this);
getSupportFragmentManager()
.beginTransaction()
.add(R.id.frameLayout, showFragment)
.commit();

}
public void switchFragment(Fragment fragment) {
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.frameLayout, fragment)
.commit();
}

}

这就是我尝试在我的第一个片段中传递 ArrayList 的方式：

Bundle dataBundle = new Bundle();
dataBundle.putParcelableArrayList("cardsList", (ArrayList<? extends Parcelable>) list);
dataBundle.putInt("position",position);
ShowDetailedPayMethodFragment showDetailPayMethod = ShowDetailedPayMethodFragment.getInstance(context);
showDetailPayMethod.setArguments(dataBundle);
((PayMethodsActivity)context).switchFragment(showDetailPayMethod);

如您所见，我还传递了一个int值，我可以毫无问题地接收该值。

然后，这是我接收数据的第二个片段(ParcelableArrayList和int值(：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View v = inflater.inflate(R.layout.fragment_view_detailed_pay_method, container, false);
if (this.getArguments()!=null) {
cardsList = this.getArguments().getParcelableArrayList("cardsList");
positionList = this.getArguments().getInt("position");
}

cardsBannerAdapter = new CustomCardsBannerAdapter(context, cardsList);
cardsViewPager.setAdapter(cardsBannerAdapter);
initSlider();
return v;
}

由于某种原因，当我到达这一点时，列表是空的，我得到的唯一值是this.getArguments().getInt("position");(int 值(

最后这是我的POJO类Cards：

package com.blumonpay.restaurant.customer.domain.model;
import android.os.Parcel;
import android.os.Parcelable;
public class Cards implements Parcelable {
private String cardNumber;
private String cardType;
private String cardBrand;
private String cardExpirationDate;
private String cardHolderName;
public Cards(String cardNumber, String cardType, String cardBrand, String cardExpirationDate, String cardHolderName) {
this.cardNumber = cardNumber;
this.cardType = cardType;
this.cardBrand = cardBrand;
this.cardExpirationDate = cardExpirationDate;
this.cardHolderName = cardHolderName;
}
public String getCardNumber() {
return cardNumber;
}
public void setCardNumber(String cardNumber) {
this.cardNumber = cardNumber;
}
public String getCardType() {
return cardType;
}
public void setCardType(String cardType) {
this.cardType = cardType;
}
public String getCardBrand() {
return cardBrand;
}
public void setCardBrand(String cardBrand) {
this.cardBrand = cardBrand;
}
public String getCardExpirationDate() {
return cardExpirationDate;
}
public void setCardExpirationDate(String cardExpirationDate) {
this.cardExpirationDate = cardExpirationDate;
}
public String getCardHolderName() {
return cardHolderName;
}
public void setCardHolderName(String cardHolderName) {
this.cardHolderName = cardHolderName;
}

protected Cards(Parcel in) {
cardNumber = in.readString();
cardType = in.readString();
cardBrand = in.readString();
cardExpirationDate = in.readString();
cardHolderName = in.readString();
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(cardNumber);
dest.writeString(cardType);
dest.writeString(cardBrand);
dest.writeString(cardExpirationDate);
dest.writeString(cardHolderName);
}
@SuppressWarnings("unused")
public static final Parcelable.Creator<Cards> CREATOR = new Parcelable.Creator<Cards>() {
@Override
public Cards createFromParcel(Parcel in) {
return new Cards(in);
}
@Override
public Cards[] newArray(int size) {
return new Cards[size];
}
};
}

我错过了什么吗？

Answer 1

在 kotlin 中尝试了相同的操作，卡片.java完好无损。该列表已通过。这是片段。 你能试着比较一下吗？

以第一个片段为例：

val item = Cards("gfhfhfhfh", "", "", "", "")
val list = ArrayList<Cards>()
list.add(item

传递为：(无显式强制转换(

bundle.putParcelableArrayList("list",list)

在下一个片段中：

val l = arguments?.getParcelableArrayList<Cards>("list")

Answer 2

根据这篇文章，如何编组和取消编组 Parcelable，Parcelable对象不稳定，这很可能是您无法将其从一个活动传递到另一个活动的原因。我最近遇到了类似的问题，并使用相同的帖子来解决我的问题。基本上分步进行： 1. 您需要将第一Activity中的Parcelable对象编组为：

byte[] bytes = marshall(parcelableObj);
intentOpenSecondActivity.putExtra(SOME_KEY, bytes);

2.您需要在第二Activity中将其解组为：

byte[] bytes = getIntent().getExtras().getByteArray(SOME_KEY);
parcelableObj = unmarshall(bytes, ParcelableObject.CREATOR);