从RecyclerView / ItemTouchHelper拖放后更新数据库

Question

Implemented drag'ndrop for RecyclerView via ItemTouchHelper, so user can change order of items by dragging them up or down.

As by spec - the movement ends when ItemTouchHelper.Callback#clearView is called by android support library, so we need to update DB here (sqlite) and change order of dragged item and others (which were affected) - means ~a few requests to DB.

But as I see clearView is called from GUI thread we can't do it from there (a few requests can be quite heavy depending on DB indexes and number of affected items).

So what are the best practices here? Or just triggering DB updates from clearView via android.os.AsyncTask ?

Answer 1

最后，我通过android.os.AsyncTask ：将所有数据库交互都移到了那里。