The Animations Demo app – introducing SeekBar

That was enough theory, especially with something that should be so visible. Let's build an animation demo app that explores everything that we just discussed and a bit more.

This app involves a little amount of code in lots of different files. So, I have tried to make it plain which code is in which file, so you can keep track of what is going on. This will make the Java code that we write in this mini app more understandable as well.

The app will demonstrate rotations, fades, translations, animation events, interpolations, and controlling duration with SeekBar. The best way to explain what SeekBar does is to build it and then watch it in action.

Laying out the animation demo

Create a new project called Animation Demo, leaving all the settings at their defaults as usual.

Here is how we can lay out the UI for this app:

1. Delete the default Hello world! widget.
2. Add LinearLayout (vertical).
3. Inside the layout from the previous step, place LinearLayout...