If you follow my previous posts, you may already know that we discussed how to make an application with database in Android before in Android, Dependency Injection (IOC) with roboguice and MVVM (Model-View-ViewModel) pattern. Although the main topic in that article relates to Dependency Injection but we had also a working example which fully supports all CRUD actions for Sqlite database. However, in practice, it shouldn’t work like that because the synchronous read/write actions will block the user interface and your apps will freeze. When your database grows over time, the query time gets longer and you app will completely freeze during the query get executed. Therefore, in this post, I would like to make a sample for illustrating how a database application can work in asynchronous mode.