Android笔记之Intent传递自定义对象

1、

import java.util.List;

import android.os.Parcel;

import android.os.Parcelable;

/**

 * 1）writeToParcel 方法。该方法将类的数据写入外部提供的Parcel中。

 * 2）describeContents方法。直接返回0就可以。

 * 3）静态的Parcelable.Creator<T>接口，本接口有两个方法：

 * createFromParcel(Parcel in) 实现从in中创建出类的实例的功能。

 * newArray(int size) 创建一个类型为T，长度为size的数组， returnnew T[size];即可。本方法是供外部类反序列化本类数组使用。

 *

 * @author JL

 */

public class ViewPoint implements Parcelable {
private String v_name;
private List<String> v_picture;
private List<String> v_description;
/**

     * 这一步read的顺序要和writeToParcel的顺序保持一致

     * @param parcel

     */

    private ViewPoint(Parcel parcel) {

        // TODO Auto-generated constructor stub

        v_name=parcel.readString();

        v_description=parcel.readArrayList(List.class.getClassLoader());

        v_picture=parcel.readArrayList(List.class.getClassLoader());

        //List<String> :parcel.readArrayList(List.class.getClassLoader())

        //Map<String, String> :parcel.readHashMap(Map.class.getClassLoader())

        //List<School> :parcel.readArrayList(School.class.getClassLoader())

        //School :(School) parcel.readParcelable(School.class.getClassLoader())

    }

    public ViewPoint() {

        // TODO Auto-generated constructor stub

    }

    public static final Parcelable.Creator<ViewPoint> CREATOR=new Parcelable.Creator<ViewPoint>() {
@Override

        public ViewPoint createFromParcel(Parcel source) {

            // TODO Auto-generated method stub

            return new ViewPoint(source);

        }
@Override

        public ViewPoint[] newArray(int size) {

            // TODO Auto-generated method stub

            return new ViewPoint[size];

        }

    };
public String getV_name() {

        return v_name;

    }

    public void setV_name(String v_name) {

        this.v_name = v_name;

    }

    public List<String> getV_picture() {

        return v_picture;

    }

    public void setV_picture(List<String> v_picture) {

        this.v_picture = v_picture;

    }

    public List<String> getV_description() {

        return v_description;

    }

    public void setV_description(List<String> v_description) {

        this.v_description = v_description;

    }

    @Override

    public int describeContents() {

        // TODO Auto-generated method stub

        return 0;

    }
@Override

    public void writeToParcel(Parcel dest, int flags) {

        // TODO Auto-generated method stub

        //向Parcel对象写入要序列化的数据

        //List一律写成 :writeList

        //School :writeParcelable(schoolInfo, arg1),且School本身是Parcelable对象

        dest.writeString(v_name);

        dest.writeList(v_description);

        dest.writeList(v_picture);

    }

}

Done