Android Programming with Kotlin for Beginners

Creating UI widgets from pure Kotlin without XML

We can also create widgets from Kotlin objects that are not a reference to an object in our layout. We can declare, instantiate, and set a widget's attributes, all in code, as follows:

Val myButton = Button()

The preceding code creates a new Button instance. The only caveat is that the Button instance must be part of a layout before it can be seen by the user. So, we can either get a reference to a layout element from our XML layout in the same way that we previously did using the findViewById function, or we can create a new one in code.

If we assume that we have a LinearLayout in our XML with an id property equal to linearLayout1, we can incorporate our Button instance from the preceding line of ...