androidkotlinandroid-jetpack-composeandroid-jetpack

Apply darker ripple to Button only not Text inside : Jetpack Compose


I have applied the ripple to the Button using RippleTheme but the problem is it is also getting applied over the text that is inside that Button.

Here is my code:

object RippleCustomTheme : RippleTheme {

    @Composable
    override fun defaultColor() =
        RippleTheme.defaultRippleColor(
            Color(0xFF1F7EFF),
            lightTheme = true
        )

    @Composable
    override fun rippleAlpha(): RippleAlpha =

        RippleAlpha(
            pressedAlpha = 1f,
            focusedAlpha = 0f,
            draggedAlpha = 0f,
            hoveredAlpha = 0f
        )
}

Here is how i applied it:

CompositionLocalProvider(LocalRippleTheme provides RippleCustomTheme) {
    Button(shape = RoundedCornerShape(28.dp),
        modifier = Modifier.size(120.dp),
        colors = ButtonDefaults.buttonColors(containerColor = DialPadButtonColor),
        onClick = { }) {
        
        Text(
            text = "1",
            fontSize = 25.sp,
            color = Color.Black,

        )
    }
}

The Output:

enter image description here

Problem:

The ripple is also applied over the text because it is greyed out. Is there any solution for that?


Solution

  • indication is drawn after drawWithContent() so it's always above content.

    You can change this by using Modifier.drawWithContent yourself and drawing text or put your Button inside a Box and add another Text above it.

    @Preview
    @Composable
    private fun ButtonRiplleTest() {
        Column {
    
            CompositionLocalProvider(LocalRippleTheme provides RippleCustomTheme) {
                Button(shape = RoundedCornerShape(28.dp),
                    modifier = Modifier.size(120.dp),
                    colors = ButtonDefaults.buttonColors(containerColor = Color.Blue),
                    onClick = { }) {
    
                    Text(
                        text = "1",
                        fontSize = 25.sp,
                        color = Color.Black,
    
                        )
                }
    
            }
    
            Spacer(modifier = Modifier.height(20.dp))
    
            val textMeasurer = rememberTextMeasurer()
    
            val style = MaterialTheme.typography.labelLarge.copy(fontSize = 25.sp, color = Color.Black)
    
            CompositionLocalProvider(LocalRippleTheme provides RippleCustomTheme) {
                Button(shape = RoundedCornerShape(28.dp),
                    modifier = Modifier.size(120.dp).drawWithContent {
                        val textLayoutResult = textMeasurer.measure(
                            "1",
                            style = style
                        )
                        drawContent()
                        drawText(
                            textLayoutResult,
                            color = style.color,
                            topLeft = Offset(
                                x = (size.width-textLayoutResult.size.width)/2,
                                y = (size.height-textLayoutResult.size.height)/2,
                            )
                        )
    
                    },
                    colors = ButtonDefaults.buttonColors(containerColor = Color.Blue),
                    onClick = { }) {}
    
            }
    
    
            Spacer(modifier = Modifier.height(20.dp))
    
            Box(
                contentAlignment = Alignment.Center
            ) {
                CompositionLocalProvider(LocalRippleTheme provides RippleCustomTheme) {
                    Button(shape = RoundedCornerShape(28.dp),
                        modifier = Modifier.size(120.dp),
                        colors = ButtonDefaults.buttonColors(containerColor = Color.Blue),
                        onClick = { }) {
    
                        Text(
                            text = "1",
                            fontSize = 25.sp,
                            color = Color.Black,
    
                            )
                    }
    
                }
    
                Text(
                    text = "1",
                    fontSize = 25.sp,
                    color = Color.Black,
    
                    )
            }
        }
    }