How to embed a high-resolution icon in a non-Amazon-AppStore Kindle Fire app?

Question

So it looks like the Kindle Fire supports sideloading, which is great, and supports it even without the use of ADB - a user can download an APK and tap on the \"download complet

Answer 1

Note: the following info is now outdated.

Apparently they're doing something funky. From the docs:

How do I get a high-resolution icon for my app to display on Kindle Fire?

The icons on Kindle Fire are dynamically pulled from the Amazon Appstore for Android. Side-loaded apps cannot use this feature. Once you've submitted your app and it's live in the Amazon Appstore, your app's appropriate icon will automatically be displayed.