When should I do certain SQLite operations on another thread(not the main thread)?

Question

My Android application includes an SQLite database with an SQLiteOpenHelper class to help manage it. During application use, the user may perform some operatio

Answer 1

General rule for everything: If it's fast enough, do it on the main thread. If not, use a worker thread.

Unless you have a ridiculously huge database, a single operation almost never warrants a separate thread. Databases in general are designed to scale well, but of course a very big database (10,000+ rows?) will be a bit slower than a small one. 30 rows, however, is nothing.

I would start threading stuff if you have a lot of operations going on, like a bunch of queries, or complicated queries that span several tables.

As with everything - profile your app, and if it's too slow, optimize. Don't write an awesome synchronized super-duper multi-core-ready database handler if none of your queries takes longer than 2ms.