Lesson 1: Composable functions. Jetpack Compose is built around composable functions. These functions let you define your app's UI programmatically by describing its shape and data dependencies, rather than focusing on the process of the UI's cons

Kotlin // Hide the status bar. window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_FULLSCREEN // Remember that you should never show the action bar if the // status bar is hidden, so hide that too if necessary. actionBar?.hide()

This guide is for publishers who want to monetize an Android app with AdMob and aren't using Firebase. If you plan to include Firebase in your app (or you're considering it), see the AdMob with Firebase version of this guide instead.