How to serialize ArrayList

Question

This question was asked many times, but I haven't found a good solution yet. I want to store my Arraylist in the sharedpreferences in Android as a String. So how can I serialize and deserialize it?

Any solutions?

What are the objects in the list? Are they from your own custom class? — Code-Apprentice, Oct 28 '16 at 23:38
Possible duplicate of [Save ArrayList to SharedPreferences](http://stackoverflow.com/questions/7057845/save-arraylist-to-sharedpreferences) — OneCricketeer, Oct 29 '16 at 00:27
That post describes the same solution you accepted, so I'm not sure what you meant by "haven't found a good solution yet" — OneCricketeer, Oct 29 '16 at 00:28

score 2 · Accepted Answer · answered Oct 29 '16 at 00:16

2

Try using Gson Library this way:

String json = new Gson().toJson(<your list>);

To add Gson library add to dependencies

compile "com.google.code.gson:gson:2.6.2"

answered Oct 29 '16 at 00:16

Marco Pierucci

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Version `2.8.0` is the latest Gson, as of those post – OneCricketeer Oct 29 '16 at 00:29
Good catch! not using Gson lately – Marco Pierucci Oct 29 '16 at 00:31

score 0 · Answer 2 · answered Oct 29 '16 at 00:15

0

You can supply a toString() method for your custom objects then call toString() on the ArrayList. Parsing the string to deserialize it will be more difficult.

answered Oct 29 '16 at 00:15

Code-Apprentice

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2 Answers2