I am having an Android Composable UI with a Button.
How can I track button long press events? I got it working for the Text long press, but for Button, It is not working. Same way like below if I apply a modifier to the button, it is not working.
Text(
text = view.text,
fontSize = view.textFontSize.toInt().sp,
fontWeight = FontWeight(view.textFontWeight.toInt()),
color = Color(android.graphics.Color.parseColor(view.textColor)),
modifier = Modifier.clickable(
onClick = {
println("Single Click")
},
onLongClick = {
println("Long Click")
},
onDoubleClick = {
println("Double Tap")
},
),
)
The best way to handle this is to roll your own Button. The Material Button is basically just a Surface and a Row. The reason adding your own Modifier.clickable doesn't work is because one is already set.
So, if you'd like to add onLongPress, etc you can copy/paste the default implementation and pass those lambdas in.
@Composable
@OptIn(ExperimentalMaterialApi::class, ExperimentalFoundationApi::class)
fun Button(
onClick: () -> Unit,
modifier: Modifier = Modifier,
onLongClick: (() -> Unit)? = null,
onDoubleClick: (() -> Unit)? = null,
enabled: Boolean = true,
interactionState: InteractionState = remember { InteractionState() },
elevation: ButtonElevation? = ButtonDefaults.elevation(),
shape: Shape = MaterialTheme.shapes.small,
border: BorderStroke? = null,
colors: ButtonColors = ButtonDefaults.buttonColors(),
contentPadding: PaddingValues = ButtonDefaults.ContentPadding,
content: @Composable RowScope.() -> Unit
) {
val contentColor by colors.contentColor(enabled)
Surface(
shape = shape,
color = colors.backgroundColor(enabled).value,
contentColor = contentColor.copy(alpha = 1f),
border = border,
elevation = elevation?.elevation(enabled, interactionState)?.value ?: 0.dp,
modifier = modifier.combinedClickable(
onClick = onClick,
onDoubleClick = onDoubleClick,
onLongClick = onLongClick,
enabled = enabled,
role = Role.Button,
interactionState = interactionState,
indication = null
)
) {
Providers(LocalContentAlpha provides contentColor.alpha) {
ProvideTextStyle(
value = MaterialTheme.typography.button
) {
Row(
Modifier
.defaultMinSizeConstraints(
minWidth = ButtonDefaults.MinWidth,
minHeight = ButtonDefaults.MinHeight
)
.indication(interactionState, rememberRipple())
.padding(contentPadding),
horizontalArrangement = Arrangement.Center,
verticalAlignment = Alignment.CenterVertically,
content = content
)
}
}
}
}
Usage:
Button(
onClick = {},
onLongClick = {},
onDoubleClick = {}
) {
Text(text = "I'm a button")
}
https://developer.android.com/jetpack/compose/gestures can be used as well.
for example:
import androidx.compose.ui.input.pointer.pointerInput
import androidx.compose.foundation.gestures.detectTapGestures
modifier = Modifier
.weight(2f)
.pointerInput(Unit){
detectTapGestures(
onLongPress = {
// perform some action here..
}
)
}
You can use combinedClickable like the following:
Modifier
.combinedClickable(
onClick = { },
onLongClick = { },
)
Warning: with Compose 1.0.1 this method is marked as @ExperimentalFoundationApi so this answer may get outdated in the future releases.
According to documentation
Modifier.pointerInput(Unit) {
detectTapGestures(
onPress = { /* Called when the gesture starts */ },
onDoubleTap = { /* Called on Double Tap */ },
onLongPress = { /* Called on Long Press */ },
onTap = { /* Called on Tap */ }
)
}