Your First Kotlin Android App: An App From Scratch

Aug 15 2023 · Kotlin 1.8.20, Android 13, Android Studio Flamingo | 2022.2.1

Part 1: Get Started with Android Development

08. Modify Composables

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Previous episode: 07. Build the Game UI Next episode: 09. Add String Resources

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Notes: 08. Modify Composables

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In the last episode you got started with working with composables and adding the base components for the Bullseye app. You were introduced to composable function parameters which lets you modify or affect your composables in some way.

Column(
  horizontalAlignment = Alignment.CenterHorizontally,
  modifier = Modifier.fillMaxSize() // New Code
)

modifier = Modifier
  .fillMaxSize()
  .padding(16.dp),

verticalArrangement = Arrangement.Center,

verticalArrangement = Arrangement.SpaceEvenly,

// Inner Column
horizontalAlignment = Alignment.CenterHorizontally,
verticalArrangement = Arrangement.SpaceEvenly,

Spacer(modifier = Modifier.weight(.5f)) // New Code
Column(
  // ...
  modifier = Modifier.weight(9f) // New Code
) {
  //...
Spacer(modifier = Modifier.weight(.5f)) // New Code

Row(
  verticalAlignment = Alignment.CenterVertically,
) {
  Text(
    "1",
    textAlign = TextAlign.Center, // New Code
    modifier = Modifier.padding(start = 16.dp) // New Code
  )
  Slider(
    // ...
    modifier = Modifier.weight(1f) // New Code
  )
  Text(
    "100",
    textAlign = TextAlign.Center, // New Code
    modifier = Modifier.padding(end = 16.dp) // New Code
  )
}