Jetpack Compose Question: I am trying to get a android.ui.material.button to look pressed. How is th...

# compose

[Guy Bieber]

Jetpack Compose Question: I am trying to get a android.ui.material.button to look pressed. How is that done in compose?

[Adam Powell]

Is it not pressed when you touch it?

[Guy Bieber]

It doesn’t show a ripple effect visually

[Guy Bieber]

I click happens but the button doesn’t visually show the press

[Louis Pullen-Freilich [G]]

Could you share some code?

[sindrenm]

Make sure you provide a callback to be called when it's pressed. Otherwise, it'll be disabled.

[Adam Powell]

@sindrenm fwiw we're going to be adding explicit enabled: Boolean params to these composables and not using nullable callbacks as that signal. It's often confusing and leads to very strange code shapes the way it is today.

[Guy Bieber]

I have an onClick callback but still get no visual indication. Is there something else I need to do?

[Andrey Kulikov]

can you show the code? maybe the Ripple is drawn with the same color as the background, for example

[Guy Bieber]

@Composable
fun ButtonStyled (text : String, onClick:  (() -> Unit)?) {
    Button(onClick = onClick) {
        Text(text)
    }
}

[Guy Bieber]

Column() {
    ButtonStyled(
        text = "Refresh",
        onClick = { bleTestViewModel.devicesRefresh() }
    )
}

[Louis Pullen-Freilich [G]]

Are you setting a theme anywhere? (MaterialTheme)

[Guy Bieber]

Yes.

private fun SwitchPage (newPage : AppPages ) {
    currentPage = newPage
    setContent {
        MaterialTheme {
            when (currentPage) {
                AppPages.DEVICES_PAGE -> {
                    DevicesPage()
                }
                AppPages.DEVICE_PAGE -> {
                    DevicePage()
                }
                AppPages.UART_PAGE -> {
                    UARTPage()
                }
                <http://AppPages.INFO|AppPages.INFO>_PAGE -> {
                    InfoPage()
                }
                AppPages.NO_PAGE -> {
                }
            }
        }
    }
}

[Guy Bieber]

It works it is just very subtle. I changed the color of the button and it shows a bit more.