adnroid中的序列化（二）自定义类内部变量

﹏ヽ暗。殇╰゛Y 2022-05-28 11:24 131阅读 0赞

对于基础的String，int等java支持的Parcelable类，简单写一下写入和读取就可以了，对于含有成员是自己写的Parcelable类有些不同，差别也不大。

代码如下，定义个Parcelable类

package com.xue.qin.demo.myparcelableclass;
    
    import android.os.Parcel;
    import android.os.Parcelable;
    
    /**
     * Created by xue.qin on 2017/6/5.
     */
    
    public class MyObject implements Parcelable {
        private int n;
        private String name;
    
        public int getN() {
            return n;
        }
    
        public void setN(int n) {
            this.n = n;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public String getUseless() {
            return useless;
        }
    
        public void setUseless(String useless) {
            this.useless = useless;
        }
    
        private String useless;
    
        public MyObject(){
            n=0;
            name="default";
            useless="default";
        }
    
    
    
    
        public MyObject(int n, String name, String useless) {
            this.n = n;
            this.name = name;
            this.useless = useless;
        }
    
        public MyObject(Parcel source) {
            readFromParcel(source);
        }
    
        @Override
        public int describeContents() {
            return 0;
        }
    
        @Override
        public void writeToParcel(Parcel dest, int flags) {
            dest.writeInt(n);
            dest.writeString(name);
            dest.writeString(useless);
        }
    
        public void readFromParcel(Parcel source) {
            this.n = source.readInt();
            this.name = source.readString();
            this.useless = source.readString();
        }
    
        public static final Parcelable.Creator<MyObject> CREATOR = new Creator<MyObject>() {
            @Override
            public MyObject createFromParcel(Parcel source) {
                MyObject myObject2 = new MyObject(source);
                return myObject2;
            }
    
            @Override
            public MyObject[] newArray(int size) {
                return new MyObject[size];
            }
        };
    
        @Override
        public String toString() {
            return "( n:" + n + " name:" + name + " useless:" + useless + " 地址:" + super.toString() + " )";
        }
    }

另一Parcelable类包含上一个MyObject的成员

package com.xue.qin.demo.myparcelableclass;
    
    import android.os.Parcel;
    import android.os.Parcelable;
    
    /**
     * Created by qinxue on 2018/4/4.
     */
    
    public class OuterClassObj implements Parcelable {
        private String content;
        private MyObject myObject;
    
        private OuterClassObj(Parcel source) {
            content = source.readString();
            myObject = source.readParcelable(MyObject.class.getClassLoader());
        }
    
        public OuterClassObj(String content, MyObject myObject) {
            this.content = content;
            this.myObject = myObject;
        }
    
        @Override
        public int describeContents() {
            return 0;
        }
    
        @Override
        public void writeToParcel(Parcel parcel, int i) {
            parcel.writeString(content);
            parcel.writeParcelable(myObject, i);
        }
    
        public static final Parcelable.Creator<OuterClassObj> CREATOR = new Creator<OuterClassObj>() {
            @Override
            public OuterClassObj createFromParcel(Parcel source) {
                OuterClassObj outerObj = new OuterClassObj(source);
                return outerObj;
            }
    
            @Override
            public OuterClassObj[] newArray(int size) {
                return new OuterClassObj[size];
            }
        };
    
        @Override
        public String toString() {
            return " content: "+content + " myObject = "+myObject;
        }
    }

大概就是这样啦。