Step #2: Creating Some Fake Data

At the moment, our repository has no data. We need to fix this, so that we have some to-do items to show in our UI. But we have not built any forms to allow the user to create new to-do items either. So, for the time being, we can have our repository create some fake data, which we can then replace with user-supplied data later on.

To that end, replace the stub ToDoRepository that Android Studio gave us with:

package com.commonsware.todo

class ToDoRepository {
  var items = listOf(
    ToDoModel(
      description = "Buy a copy of _Exploring Android_",
      isCompleted = true,
      notes = "See https://wares.commonsware.com"
    ),
    ToDoModel(
      description = "Complete all of the tutorials"
    ),
    ToDoModel(
      description = "Write an app for somebody in my community",
      notes = "Talk to some people at non-profit organizations to see what they need!"
    )
  )
}

This just adds an items property that is a simple immutable list of three ToDoModel objects. We provide a description for all three models, but we use the default constructor options for some of the other properties.

Later, this is going to need to get a lot more complicated:

• We will need to get our data from a database
• We will need to update the database with new, changed, or deleted models
• All of that is slow, so we will need to do that work on a background thread

But, for the moment, this will suffice. In an upcoming tutorial, we will have our RosterListFragment get its data from this ToDoRepository singleton.