textcanvas3.kt

@OptIn(ExperimentalTextApi::class)
@Composable
fun ExampleTextAnnotatedString() {

    val textMeasure = rememberTextMeasurer()

    val text = buildAnnotatedString {
        withStyle(
            style = SpanStyle(
                color = Color.White,
                fontSize = 22.sp,
                fontStyle = FontStyle.Italic
            )
        ) {
            append("Hello,")
        }
        withStyle(
            style = SpanStyle(
                brush = Brush.horizontalGradient(colors = RainbowColors),
                fontSize = 28.sp,
                fontWeight = FontWeight.Bold
            )
        ) {
            append("\nText on Canvas️")
        }
    }
    Canvas(modifier = Modifier
        .fillMaxWidth()
        .height(100.dp), onDraw = {
        drawRect(color = Color.Black)

        drawText(
            textMeasurer = textMeasure,
            text = text,
            topLeft = Offset(10.dp.toPx(), 10.dp.toPx())
        )
    })
}