how to serialize ArrayList on android

i have a basic function which requires serializing in my android app. The user will add some values to an ArrayList and i want to serialize it to avoid using a database for this little option and of course TO LEARN how to serialize (i'm a begginer) 开发者_高级运维because it seems useful. Anyways the user save something in the arraylist, the program shuts down, the program starts up again and the user is able to see the saved data. How can i implement this? Can you provide some code snippet or a useful link?

Thanks a lot!!

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You can do this by custom bean class and implement Serializable to that so now when you create ArrayList<E> of that class it is Serializable.

Example:

Class dataBean implements Serializable
{
     public String name;
}

ArrayList<dataBean> dataBeanArrayList = new ArrayList();

So dataBeanArrayList is now Serializable and you can also pass this between Intent.

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I suggest using flexjson to serialize the data to a file. Then you can read that back using that library. This has several advantages over serialization which is being able to load your stream back into potential differing versions of your objects. Using ObjectInputStream you have to be very careful, and quite frankly I've never seen it work all that well.

http://flexjson.sourceforge.net

Here is a blog post how to do that:

http://wrongnotes.blogspot.com/2010/09/flexjson-meet-android.html