CODEWITHSUNDEEP
androidstatichashmapfinal
platypus
platypus

Reputation: 706

Storing hashmap data in application

I want to store my HashMap inside my application so everytime i restart the application i can retrieve my HashMap. I've seen many ways via Google but what is the most efficient way to do it in my case?

Upvotes: 1

Views: 322

Answers (2)

Alex Lockwood
Alex Lockwood

Reputation: 83311

If you are using the HashMap as a means of retrieving constant data (i.e. the values inside the HashMap won't change), it is as simple as initializing the HashMap in your code as follows:

private static final Map map = new HashMap();

static {
    map.put(...);
    map.put(...);
    /* etc... */
}

If you want this information to be globally accessible, you can create a subclass of Application and initialize it there instead.

Upvotes: 2

Moritz
Moritz

Reputation: 10352

You should use the preferences if the amount of data is not to big. Convert your HashMap to JSON (maybe via gson) and than store it as a string.

If you have a lot of data you need to access fast you can use the integrated sqlite database.

Upvotes: 2

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