Android 保存自定义对象数组 [英] Android save array of custom objects

问题描述

我有一个关于保存自定义对象数组列表的问题.我有一个叫做 notitie 的类:

I have a question about saving an arraylist of custom objects. I have a class called notitie:

public class Notitie implements Serializable{

private String titel = "";
private String type = "";
private String datum = "";

public void setTitel (String titel){
    this.titel = titel;
}
public String getTitel(){
    return titel;
}
public void setType (String type){
    this.type = type;
}
public String getType(){
    return type;
}
public void setDatum (String datum){
    this.datum = datum;
}
public String getDatum(){
    return datum;
}
}

我创建了 Notitie 的一些对象并将它们添加到我的名为 notities 的数组列表中

I create some objects of Notitie and add them to my arraylist called notities

ArrayList<Notitie> notities = new ArrayList<Notitie>();

Notitie notitie1 = new Notitie();
notitie1.setTitel("Meting");
notitie1.setType("Watermeting");
notitie1.setDatum("22-09-12");
notities.add(notitie1);

Notitie notitie2 = new Notitie();
notitie1.setTitel("Meting2");
notitie1.setType("Watermeting2");
notitie1.setDatum("23-09-12");
notities.add(notitie2);

Notitie notitie3 = new Notitie();
notitie1.setTitel("Meting3");
notitie1.setType("Watermeting3");
notitie1.setDatum("24-09-12");
notities.add(notitie3);

现在我想将填充的 Arraylist 保存在设备的存储中，以便随时访问.我曾经使用共享首选项将数据保存为字符串或一些整数，但我无法用它保存这个 Arraylist.有人有解决办法吗?

Now I want to save the filled Arraylist on the device's storage so it can be accessed anytime. I used to save data as a String or some Integers with sharedpreferences but I can't save this Arraylist with that. Does anybody have a solution?

提前致谢！

推荐答案

你有几个选择:

1. 使用序列化、XML 或 JSON，并将您的数据存储在文件中.如果您想实现序列化，请参阅此解决方案.

使用 SQLite 存储数据.请查看本教程以开始使用.

Store you data using SQLite. Have a look at this tutorial to get started.

您可能想阅读this 也是如此！

EDIT : You might want to read this as well!

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