AOrobator

shortcutAction {
  trackShortcutUsed(it, constellation)
}

AOrobator

@TargetApi(N_MR1)
fun trackShortcutUsed(shortcutManager: ShortcutManager, constellation: Constellation) {
  shortcutManager.reportShortcutUsed(constellation.name)
  val sharedPrefs = PreferenceManager.getDefaultSharedPreferences(APP_CONTEXT)
  val seenCount = sharedPrefs.getInt(constellation.name, 0)
  sharedPrefs
      .edit()
      .putInt(constellation.name, seenCount + 1)
      .apply()
  updateShortcuts(shortcutManager)

AOrobator

public class MainActivity extends Activity {
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ShortcutManager shortcutManager = getSystemService(ShortcutManager.class);
        if (shortcutManager.getDynamicShortcuts().size() == 0) {
            // Application restored. Need to re-publish dynamic shortcuts.
            if (shortcutManager.getPinnedShortcuts().size() > 0) {
                // Pinned shortcuts have been restored. Use
                // updateShortcuts(List) to make sure they
                // contain up-to-date information.

AOrobator

interface PlaylistRepository: Repository {
  fun addSongToPlaylist(songId: Long, playlistId: Long)
}

AOrobator

val playlist: Playlist = ...
val song: Song = ...

// This is a bug, but the compiler allows it!
playlistRepository.addSongToPlaylist(songId = playlist.id, playlistId = song.id)

AOrobator

data class SongId(id: Long)
data class PlaylistId(id: Long)

AOrobator

interface PlaylistRepository: Repository {
  fun addSongToPlaylist(songId: SongId, playlistId: PlaylistId)
}

AOrobator

// Compiler doesn’t like this. Red squigglies everywhere.
playlistRepository.addSongToPlaylist(songId = PlaylistId(420L), playlistId = SongId(9001L))

AOrobator

data class SongId(id: Long)
val Song.typedId: SongId = SongId(this.id)

data class PlaylistId(id: Long)
val Playlist.typedId: PlaylistId = PlaylistId(this.id)

AOrobator

val song: Song = ...
val playlist: Playlist = ...

playlistRepository.addSongToPlaylist(song.typedId, playlist.typedId)