Very simple example of a Loader and LoaderManager in Android
Loaders in Android are great, they allow you to asynchronously load data to be used in Adapters. I have found CursorLoaders very useful for getting data from a database to the UI in a way that minimizes blocking calls on the UI thread.
Alex Lockwood has posted a great, and detailed four part discussion of the Loader pattern on his blog. If you don’t know much about Loaders, or the LoaderManager, or why you might want to use them, go read that series. This is the nickle tour. My goal here is to show you just what you need to get you up and running with this.
Loaders are simple
All you really need to do is move your query into the
loadInBackground method, and the rest is boilerplate.
Something to call back to
You’ll need to put the
LoaderCallbacks somewhere, you can put it where you like, in an Activity or Fragment, or in a separate class. They just need to go somewhere.
Now that you’ve got the Loader and the LoaderCallbacks defined, you can call it, and start benefiting from painless asynchronous loading of your data.