二次驗證:絕對有效

轉：https://blog.csdn.net/u014614038/article/details/56279075

Android推薦可以通過Parcelable來傳遞自定義的資料()，比如以下的資料體：

public class GradeInfoForSearch {
    public String ID;
    public String Name;
    }

只要通過實現了Parcelable介面就可以了，程式碼如下：

public class GradeInfoForSearch implements Parcelable {
    public String ID;
    public String Name;

    public GradeInfoForSearch() {

    }

    public GradeInfoForSearch(Parcel source) {
        ID = source.readString();
        Name = source.readString();

    }

    @Override
    public int describeContents() {

        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {

        dest.writeString(ID);
        dest.writeString(Name);

    }

    public final static Parcelable.Creator<GradeInfoForSearch> CREATOR = new Parcelable.Creator<GradeInfoForSearch>() {

        @Override
        public GradeInfoForSearch createFromParcel(Parcel source) {

            return new GradeInfoForSearch(source);
        }

        @Override
        public GradeInfoForSearch[] newArray(int size) {

            return new GradeInfoForSearch[size];
        }
    };

    @Override
    public String toString() {
        return "GradeInfoForSearch [ID=" + ID + ", Name=" + Name + "]";
    }

}
 

複雜的資料體（物件中巢狀物件或者陣列的形式）：

public class ResourceBean{

    public List<ResourceClasslevelOne> resourceClasslevelOne;
    public List<CategoryInfoForSearch> categorylist;
    public List<SubjectNameForIndex> subjectList;
    public List<GradeInfoForSearch> gradeList;
    public List<ResourceClassLevelTwoForSearch>                      resourceClassForlevelTwo;
    }
 

正確的做法是：

1.ResourceBean實現了Parcelable。 
2.成員變數的所有自定義資料體都實現Parcelable。

writeToParce方法如下：

@Override
    public void writeToParcel(Parcel dest, int flags) {

        if (resourceClasslevelOne != null)
            dest.writeParcelableArray(
                    resourceClasslevelOne.toArray(new ResourceClasslevelOne[resourceClasslevelOne.size()]), flags);
        ....

    }
 

ResourceBean(Parcel source)如下：

public ResourceBean(Parcel source) {

        Parcelable[] resourceClasslevelOneps = source.readParcelableArray(ResourceClasslevelOne.class.getClassLoader());

        if (resourceClasslevelOneps != null) {
            resourceClasslevelOne = Arrays.asList(Arrays.asList(resourceClasslevelOneps)
                    .toArray(new ResourceClasslevelOne[resourceClasslevelOneps.length]));

        }

        ....
        }

    }