CODEWITHSUNDEEP
androidrandom
Mr. Pivirotto
Mr. Pivirotto

Reputation: 281

Large list in android?

I want to pick an entry randomly from a large list (about a 1000 entries). What is the best way of keeping that large list in my app? Should I put it into a large string array? Will it slow down my program too much when tried to randomly pick a string? Thanks!

Upvotes: 0

Views: 192

Answers (2)

Ted Hopp
Ted Hopp

Reputation: 234807

First, 1000 strings is not a particularly large array size. Whether this is a lot of memory depends on whether the strings are long.

As to picking one at random, the number of elements should not be a factor at all in terms of how long it will take to pick one. Just generate a random integer between 0 and 1000 (exclusive) and pick the one at that index.

Random random = new Math.Random(); // done once only

int randomIndex = random.nextInt(1000); // each time you need an index

Upvotes: 4

Karl-Bjørnar Øie
Karl-Bjørnar Øie

Reputation: 5572

1000 entries are not a large list if we talk about say integers and short strings, if its complex objects I really like OrmLite for database persistence.

Upvotes: 0

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