Question

我想使用@Parcel注释而不是实现Parcelable 所以我的课程是：

@Parcel
public class UserSkillSpec {
    private final String TAG = getClass().getSimpleName();

    private Skill skill;
    private int endorses = 0;
    private boolean endorsed = false;
    private List<User> endorsers = new LinkedList<>();
    private int proficiency = 0;
    private boolean verified = false;

    @ParcelConstructor
    public UserSkillSpec(Skill skill, int proficiency) {
        this.skill = skill;
        this.proficiency = proficiency;
    }

}

当我想构建项目时，此错误将出现在MessageBox

中

Error:(62, 109) error: incompatible types: Object cannot be converted to User

和用户源代码是：

@Parcel
@RealmClass
public class User extends RealmObject {
    @PrimaryKey
    private String id;

    private String firstName;
    private String lastName;
    private String name;
   //and something else

    public User() {
    }
}

显然这个问题与List有关我该如何解决我的问题呢？感谢。

EDIT1：我将User类更改为以下代码：

@Parcel(implementations = {UserRealmProxy.class},
        value = Parcel.Serialization.BEAN,
        analyze = {User.class})
@RealmClass
public class User implements RealmModel {
    @PrimaryKey
    private String id;

    private String firstName;
    private String lastName;
    private String name;
    //somethings else

    public User() {
    }
}

在Parceler库自动生成的类 UserSkillSpec $$ Parcelable 中，错误发生在以下部分：

public static void write(UserSkillSpec userSkillSpec$$1, android.os.Parcel parcel$$1, int flags$$0, IdentityCollection identityMap$$0) {
        int identity$$0 = identityMap$$0 .getKey(userSkillSpec$$1);
        if (identity$$0 != -1) {
            parcel$$1 .writeInt(identity$$0);
        } else {
            parcel$$1 .writeInt(identityMap$$0 .put(userSkillSpec$$1));
            Skill$$Parcelable.write(InjectionUtil.getField(Skill.class, UserSkillSpec.class, userSkillSpec$$1, "skill"), parcel$$1, flags$$0, identityMap$$0);
            parcel$$1 .writeInt(InjectionUtil.getField(int.class, UserSkillSpec.class, userSkillSpec$$1, "proficiency"));
            if (InjectionUtil.getField(List.class, UserSkillSpec.class, userSkillSpec$$1, "endorsers") == null) {
                parcel$$1 .writeInt(-1);
            } else {
                parcel$$1 .writeInt(InjectionUtil.getField(List.class, UserSkillSpec.class, userSkillSpec$$1, "endorsers").size());
                for (User user$$0 : InjectionUtil.getField(List.class, UserSkillSpec.class, userSkillSpec$$1, "endorsers")) {
                    User$$Parcelable.write(user$$0, parcel$$1, flags$$0, identityMap$$0);
                }
            }
            parcel$$1 .writeInt((InjectionUtil.getField(boolean.class, UserSkillSpec.class, userSkillSpec$$1, "verified")? 1 : 0));
            parcel$$1 .writeInt(InjectionUtil.getField(int.class, UserSkillSpec.class, userSkillSpec$$1, "endorses"));
            parcel$$1 .writeString(InjectionUtil.getField(String.class, UserSkillSpec.class, userSkillSpec$$1, "TAG"));
            parcel$$1 .writeInt((InjectionUtil.getField(boolean.class, UserSkillSpec.class, userSkillSpec$$1, "endorsed")? 1 : 0));
        }
    }

Answer 1

您应该为您的用户使用implements over extend，因为您的父类不可分区。

Tips

您应该考虑实施自定义创建者like this

Answer 2

最后我可以解决我的问题，并决定分享它提示： 1.列表必须是通用的。List<Item>而不是List
2.在@ParcelPropertyConverter(ItemListParcelConverter.class)

的声明中使用List<Item>

所以我的代码现在就像下面那样：

@Parcel(implementations = {UserRealmProxy.class},
        value = Parcel.Serialization.BEAN,
        analyze = {User.class})
public class User extends RealmObject {
    @PrimaryKey
    private String id;

    private String firstName;
    private String lastName;
    private String name;}

和这一个：

@Parcel
public class UserSkillSpec {
    private Skill skill;
    private int endorses = 0;
    private boolean endorsed = false;
    @ParcelPropertyConverter(ItemListParcelConverter.class)
    private List<User> endorsers = new LinkedList<>();
    private int proficiency = 0;
    private boolean verified = false;

    public UserSkillSpec() {
    }
}

这是parcelConvertor类：

public class ItemListParcelConverter<T> extends ArrayListParcelConverter<T> {
    @Override
    public void itemToParcel(T item, Parcel parcel) {
        parcel.writeParcelable(Parcels.wrap(item), 0);
    }

    @Override
    public T itemFromParcel(Parcel parcel) {
        return Parcels.unwrap(parcel.readParcelable(getClass().getClassLoader()));
    }
}

Answer 3

如果要使用RealmModel而不是RealmObject，可以按照此方法使用Parceler库。

Ex Class：

@Parcel(implementations = { CustomAreaRealmProxy.class },
        value = Parcel.Serialization.BEAN,
        analyze = { CustomArea.class })
@RealmClass
public class CustomArea implements RealmModel {
    ...
}

还有您的proguard文件；

# Parceler library
-keep interface org.parceler.Parcel
-keep @org.parceler.Parcel class * { *; }
-keep class **$$Parcelable { *; }
-keepnames public class * extends io.realm.RealmObject
-keepnames public class * implements io.realm.RealmModel  #<- This is the fix

错误：不兼容的类型：对象无法转换为MyClass

3 个答案: