使用自定义 Parcelable 对象在 Arraylist 上解组异常

Question

我正在为数据数组（来自 json）对象创建 DTO 并实现 parcelable 以将 DTO 的数组列表发送到另一个 class，但我面临

Unmarshalling unknown type code 7471216 at offset 476 this issue

。我认为 List answers read\write parcelling 存在一些问题。我找不到错误。我正在像 intent.putParcelableArrayListExtra("xxxxx", MyList); 一样发送我的数组列表，但是在获取另一个 activity 时，我收到了上述错误。请帮忙。

response{
 "errorMessage": null,
 "status": true,
 "data": [
   {
    "id": "xxxx",
    "question": "Why is your xxxx?",
    "isMandatory": true,
    "typeOfQuestion": "OPEN",
    "answers": [

  ],
  "active": true
},
{
    "id": "xxxxx",
    "question": "what is your name",
    "isMandatory": true,
    "typeOfQuestion": "OPEN",
    "answers": [

   ],
   "active": true
  }
 ],
 "httpStatus": 200
}

可包裹 Class:

 public class QuestionAnswerDto implements Parcelable {
 private String id;
 private String question;
 private String isMandatory;
 private String typeOfQuestion;
 private String active;
 private List<String> answers;

 public String getId() {
    return id;
 }

 public void setId(String id) {
    this.id = id;
}

public String getQuestion() {
    return question;
}

public void setQuestion(String question) {
    this.question = question;
}

public String getIsMandatory() {
    return isMandatory;
}

public void setIsMandatory(String isMandatory) {
    this.isMandatory = isMandatory;
}

public String getTypeOfQuestion() {
    return typeOfQuestion;
}

public void setTypeOfQuestion(String typeOfQuestion) {
    this.typeOfQuestion = typeOfQuestion;
}

public String getActive() {
    return active;
}

public void setActive(String active) {
    this.active = active;
}

public List<String> getAnswers() {
    return answers;
}

public void setAnswers(List<String> answers) {
    this.answers = answers;
}

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

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeString(this.id);
    dest.writeString(this.question);
    dest.writeString(this.typeOfQuestion);
    dest.writeString(this.active);
    dest.writeString(this.isMandatory);
    dest.writeStringList(this.answers);

}


protected QuestionAnswerDto(Parcel in) {
    this.id = in.readString();
    this.question = in.readString();
    this.typeOfQuestion = in.readString();
    this.active = in.readString();

    this.answers = new ArrayList<>();
    in.readStringList(this.answers);
    this.isMandatory = in.readString();
}



   public static final Creator<QuestionAnswerDto> CREATOR = new     Creator<QuestionAnswerDto>() {
    public QuestionAnswerDto createFromParcel(Parcel source) {
        return new QuestionAnswerDto(source);
    }

    public QuestionAnswerDto[] newArray(int size) {
        return new QuestionAnswerDto[size];
    }
  };

  }

Answer 1

您输入和阅读的顺序不正确。使用 Parcels 序列化和反序列化对象时，您必须以与写入对象相同的顺序读取。

请参阅下面更正后的代码（我移动了 QuestionAnswerDto 构造函数中的最后一行）：

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeString(this.id);
    dest.writeString(this.question);
    dest.writeString(this.typeOfQuestion);
    dest.writeString(this.active);
    dest.writeString(this.isMandatory);
    dest.writeStringList(this.answers);
}


protected QuestionAnswerDto(Parcel in) {
    this.id = in.readString();
    this.question = in.readString();
    this.typeOfQuestion = in.readString();
    this.active = in.readString();
    this.isMandatory = in.readString();
    this.answers = new ArrayList<>();
    in.readStringList(this.answers);
}

使用自定义 Parcelable 对象在 Arraylist 上解组异常

Unmarshalling exception on Arraylist with a custom Parcelable Object

android

arraylist

parcel

parcelable