LetterAvatarGenerator
Generates letter avatars as ImageBitmap with precise text measurement, percentage-based sizing, custom font support, pure-canvas rendering, and random color-palette helpers.
A Kotlin Multiplatform library that helps in creating letter avatars as ImageBitmap objects for profile placeholders. Built with Compose Multiplatform, it provides a consistent, high-performance rendering engine that works identically across Android, iOS, and other Compose targets.
The library handles text measuring, centering, and scaling automatically using a shared implementation in commonMain, ensuring your avatars look the same on every device.
-
Pure Compose Rendering: Uses
CanvasDrawScopeandTextMeasurerfor platform-agnostic drawing. -
ImageBitmap Output: Returns a standard Compose
ImageBitmapdirectly. -
Resource Integration: Easily use custom fonts from
composeResourcesviaFontFamily. - Consistent Scaling: Text size is defined as a percentage of the avatar size.
The library is available on Maven Central.
Add the dependency to your module's build.gradle.kts:
repositories {
mavenCentral()
google()
}
dependencies {
implementation("io.github.pranathi-pellakuru:Letter-Avatar-Generator:1.2.0")
}The library provides a simple API to build avatars directly in your Composable functions.
import androidx.compose.ui.graphics.Color
import com.pranathicodes.letteravatar.rememberAvatarCreator
@Composable
fun MyAvatar() {
// 1. Get the shared creator (automatically uses local Density and TextMeasurer)
val avatarCreator = rememberAvatarCreator()
// 2. Build the avatar (returns ImageBitmap)
val avatarBitmap = remember(avatarCreator) {
avatarCreator
.setLetter('P')
.setAvatarSize(180) // Size in dp-equivalent pixels
.setTextSize(45) // Text height as 45% of avatar size
.setLetterColor(Color.White)
.setBackgroundColor(Color(0xFFFF5722))
.build()
}
// 3. Display using standard Compose Image
Image(
bitmap = avatarBitmap,
contentDescription = "User Avatar"
)
}You can use custom fonts from your resources seamlessly:
val myFontFamily = FontFamily(Font(Res.font.my_custom_font))
avatarCreator.setFontFamily(myFontFamily)The library includes a RandomColors helper to manage color palettes using Compose Color:
val randomColors = RandomColors().apply {
setColorPairs(listOf(Color.White to Color.Blue, Color.Yellow to Color.Black))
}
// Pick a random pair
val pair = randomColors.getColorPair()
avatarCreator
.setLetterColor(pair.first)
.setBackgroundColor(pair.second)| Method | Description |
|---|---|
setLetter(letter: Char) |
Sets the letter to display |
setTextSize(percentage: Int) |
Sets text height as a % of avatar size (0-100, default: 40) |
setAvatarSize(size: Int) |
Sets output image size in pixels (default: 180) |
setLetterColor(color: Color) |
Sets the letter color |
setBackgroundColor(color: Color) |
Sets the background color |
setFontFamily(family: FontFamily) |
Sets a custom FontFamily
|
build() |
Returns ImageBitmap
|
-
rememberAvatarCreator(): Composable function that provides a pre-configured creator using the currentLocalDensityandTextMeasurer.
https://github.com/AmosKorir/AvatarImageGenerator
This project is licensed under the MIT License.
A Kotlin Multiplatform library that helps in creating letter avatars as ImageBitmap objects for profile placeholders. Built with Compose Multiplatform, it provides a consistent, high-performance rendering engine that works identically across Android, iOS, and other Compose targets.
The library handles text measuring, centering, and scaling automatically using a shared implementation in commonMain, ensuring your avatars look the same on every device.
-
Pure Compose Rendering: Uses
CanvasDrawScopeandTextMeasurerfor platform-agnostic drawing. -
ImageBitmap Output: Returns a standard Compose
ImageBitmapdirectly. -
Resource Integration: Easily use custom fonts from
composeResourcesviaFontFamily. - Consistent Scaling: Text size is defined as a percentage of the avatar size.
The library is available on Maven Central.
Add the dependency to your module's build.gradle.kts:
repositories {
mavenCentral()
google()
}
dependencies {
implementation("io.github.pranathi-pellakuru:Letter-Avatar-Generator:1.2.0")
}The library provides a simple API to build avatars directly in your Composable functions.
import androidx.compose.ui.graphics.Color
import com.pranathicodes.letteravatar.rememberAvatarCreator
@Composable
fun MyAvatar() {
// 1. Get the shared creator (automatically uses local Density and TextMeasurer)
val avatarCreator = rememberAvatarCreator()
// 2. Build the avatar (returns ImageBitmap)
val avatarBitmap = remember(avatarCreator) {
avatarCreator
.setLetter('P')
.setAvatarSize(180) // Size in dp-equivalent pixels
.setTextSize(45) // Text height as 45% of avatar size
.setLetterColor(Color.White)
.setBackgroundColor(Color(0xFFFF5722))
.build()
}
// 3. Display using standard Compose Image
Image(
bitmap = avatarBitmap,
contentDescription = "User Avatar"
)
}You can use custom fonts from your resources seamlessly:
val myFontFamily = FontFamily(Font(Res.font.my_custom_font))
avatarCreator.setFontFamily(myFontFamily)The library includes a RandomColors helper to manage color palettes using Compose Color:
val randomColors = RandomColors().apply {
setColorPairs(listOf(Color.White to Color.Blue, Color.Yellow to Color.Black))
}
// Pick a random pair
val pair = randomColors.getColorPair()
avatarCreator
.setLetterColor(pair.first)
.setBackgroundColor(pair.second)| Method | Description |
|---|---|
setLetter(letter: Char) |
Sets the letter to display |
setTextSize(percentage: Int) |
Sets text height as a % of avatar size (0-100, default: 40) |
setAvatarSize(size: Int) |
Sets output image size in pixels (default: 180) |
setLetterColor(color: Color) |
Sets the letter color |
setBackgroundColor(color: Color) |
Sets the background color |
setFontFamily(family: FontFamily) |
Sets a custom FontFamily
|
build() |
Returns ImageBitmap
|
-
rememberAvatarCreator(): Composable function that provides a pre-configured creator using the currentLocalDensityandTextMeasurer.
https://github.com/AmosKorir/AvatarImageGenerator
This project is licensed under the MIT License.