如何实现Parcelable含名单，其中一类;列表＆LT;字符串＆GT;＆GT;？ [英] How to implement Parcelable for a class containing List<List<String>>?

问题描述

我有一个工作 Parcelable implementaion所有在我Parcelable类中的字段除了名单，其中，名单，其中，字符串＆GT;＆GT;

  Employee类实现Parcelable {

    名单＆LT;列表＆LT;字符串＆GT;＆GT;细节;
    // .......

    保护员工（包裹的）{
        细节=新的ArrayList＆LT;列表＆LT;字符串＆GT;＆GT;（）;
        //我知道这是错的只是发布澄清
        in.readList（细节，List.class.getClassLoader（））;
        // ......
    }

    公共无效writeToParcel（包裹DEST，INT标志）{
        dest.writeList（详情）;
        // .....
    }

    公众诠释describeContents（）{
        返回0;
    }

    公共静态最终Parcelable.Creator＆LT;员工＆GT; CREATOR =
            新Parcelable.Creator＆LT;员工＆GT;（）{
        公务员createFromParcel（包裹中）{
            返回新员工（中）;
        }

        公务员[] newArray（INT尺寸）{
            返回新员工【尺寸】;
        }
    };

}
 

例外：

  05-10 19：07：44.072：E / AndroidRuntime（10661）：java.lang.RuntimeException的：地块android.os.Parcel@42a509e8：由解组造成未知类型$ C $Ç3604535偏移量268
 

解决方案

扩展的ArrayList 和实施 Parcelable 就可以了为我工作。

 公共类ParcelableArrayList扩展的ArrayList＆LT;字符串＆GT;器物
        Parcelable {

    私有静态最后长的serialVersionUID = -8516873361351845306L;

    公共ParcelableArrayList（）{
        超（）;
    }

    保护ParcelableArrayList（包裹中）{
        in.readList（此，String.class.getClassLoader（））;
    }

    @覆盖
    公众诠释describeContents（）{
        返回0;
    }

    @覆盖
    公共无效writeToParcel（包裹DEST，INT标志）{
        dest.writeList（本）;
    }

    公共静态最终Parcelable.Creator＆LT; ParcelableArrayList＆GT; CREATOR =
            新Parcelable.Creator＆LT; ParcelableArrayList＆GT;（）{
        公共ParcelableArrayList createFromParcel（包裹中）{
            返回新ParcelableArrayList（中）;
        }

        公共ParcelableArrayList [] newArray（INT尺寸）{
            返回新ParcelableArrayList【尺寸】;
        }
    };

}
 

和Employee类

  Employee类实现Parcelable {

    名单＆LT; ParcelableArrayList＆GT;细节;
    // .......

    保护员工（包裹的）{
        细节=新的ArrayList＆LT; ParcelableArrayList＆GT;（）;
        in.readTypedList（详细信息，ParcelableArrayList.CREATOR）;
        // ......
    }

    公共无效writeToParcel（包裹DEST，INT标志）{
        dest.writeList（详情）;
        // .....
    }

    公众诠释describeContents（）{
        返回0;
    }

    公共静态最终Parcelable.Creator＆LT;员工＆GT; CREATOR =
            新Parcelable.Creator＆LT;员工＆GT;（）{
        公务员createFromParcel（包裹中）{
            返回新员工（中）;
        }

        公务员[] newArray（INT尺寸）{
            返回新员工【尺寸】;
        }
    };

}
 

I have a working Parcelable implementaion for all the fields in my Parcelable Class apart from List<List<String>>

class Employee implements Parcelable {

    List<List<String>> details;
    //.......

    protected Employee(Parcel in) {
        details = new ArrayList<List<String>>();
        // i know this is wrong just posting to clarify
        in.readList(details, List.class.getClassLoader());
        //......
    }

    public void writeToParcel(Parcel dest, int flags) {
        dest.writeList(details);
        //.....
    }

    public int describeContents() {
        return 0;
    }

    public static final Parcelable.Creator<Employee> CREATOR = 
            new Parcelable.Creator<Employee>() {
        public Employee createFromParcel(Parcel in) {
            return new Employee(in);
        }

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

}

Exception:

05-10 19:07:44.072: E/AndroidRuntime(10661): Caused by: java.lang.RuntimeException: Parcel android.os.Parcel@42a509e8: Unmarshalling unknown type code 3604535 at offset 268

解决方案

Extending ArrayList and implementing Parcelable on it worked for me.

public class ParcelableArrayList extends ArrayList<String> implements 
        Parcelable {

    private static final long serialVersionUID = -8516873361351845306L;

    public ParcelableArrayList(){
        super();
    }

    protected ParcelableArrayList(Parcel in) {
        in.readList(this, String.class.getClassLoader());
    }

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

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

    public static final Parcelable.Creator<ParcelableArrayList> CREATOR = 
            new Parcelable.Creator<ParcelableArrayList>() {
        public ParcelableArrayList createFromParcel(Parcel in) {
            return new ParcelableArrayList(in);
        }

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

}

and Employee class

class Employee implements Parcelable {

    List<ParcelableArrayList> details;
    //.......

    protected Employee(Parcel in) {
        details = new ArrayList<ParcelableArrayList>();
        in.readTypedList(details,ParcelableArrayList.CREATOR);
        //......
    }

    public void writeToParcel(Parcel dest, int flags) {
        dest.writeList(details);
        //.....
    }

    public int describeContents() {
        return 0;
    }

    public static final Parcelable.Creator<Employee> CREATOR = 
            new Parcelable.Creator<Employee>() {
        public Employee createFromParcel(Parcel in) {
            return new Employee(in);
        }

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

}

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