Learning Android

Picking up native Android by building 1-1-2, a boxercise drill timer with voice callouts written in Kotlin and Jetpack Compose. Each slice breaks off a chunk of the work.

1. Slice 1

   Kotlin for JS Devs

   Pure Kotlin, no Android. The language pieces a JavaScript developer needs to read and write Android code, with a translation exercise at the end.

2. Slice 2

   Android Studio, Gradle & First Screen

   Scaffold the app, render a hardcoded "Start Workout" button, see the activity lifecycle log on launch and rotation.

3. Slice 3

   Compose & the Config Screen

   Workout config screen with number inputs for rounds, round length, rest length. Composables, modifiers, state hoisting, and previews.

4. Slice 4

   ViewModel & StateFlowComing soon

   Move config state into a ViewModel. Drill list editor.

5. Slice 5

   Timers Done RightComing soon

   Round countdown screen. Bell at start and end. CountDownTimer vs coroutines.

6. Slice 6

   Text-to-Speech for Voice CalloutsComing soon

   Hook up Android TTS. Drill callouts during a round.

7. Slice 7

   Foreground ServicesComing soon

   Workout keeps running when the screen is off or the app backgrounds.

8. Slice 8

   Persisting with RoomComing soon

   Save workout templates locally. Room vs Prisma comparison.

9. Slice 9

   Polish: Haptics, Audio Focus, Wake LockComing soon

   Buzz on bell, behave when Spotify is playing, keep the screen on during a workout.

10. Slice 10

    Publishing to the Play StoreComing soon

    Signing, ProGuard / R8, Play Console basics, security checklist.