当我点击
MyBox()
时没有连锁反应我已将 MyTheme(){} 添加到主 @Composable 屏幕,但它不起作用。是不是少了点什么?
@Composable
private MyBox(onClickInvoked: () -> Unit) {
MyAppTheme(isSystemInDarkTheme()) {
Box(
modifier = Modifier
.fillMaxWidth()
.wrapContentHeight()
.clip(RoundedCornerShape(10.dp))
.background(MaterialTheme.colors.onBackground)
.clickable(onClick = { onClickInvoked.invoke() })
.padding(horizontal = 10.dp, vertical = 15.dp)
) {
Text(
text = "My text",
modifier = Modifier
.align(Alignment.CenterStart)
.padding(end = 95.dp)
.wrapContentWidth()
.wrapContentHeight(),
color = MaterialTheme.colors.primary
)
Image(
painter = painterResource(R.drawable.icon),
modifier = Modifier
.align(Alignment.CenterEnd)
.padding(end = 20.dp)
.size(60.dp)
)
}
}
}
使用 compose 1.0.5,我看到设置
indication
后默认的 clickable
是
LocalIndication.current
。 LocalIndication.current
是 PlatformRipple
。因此,当您将 clickable
设置为您的 Box
后,就会产生连锁反应。
在你的情况下,我认为波纹效果不会显示,因为你的盒子背景太暗(通常
MaterialTheme.colors.onBackground
在浅色主题上是黑色的)
我认为你可以更改波纹效果颜色以使其易于查看。
Surface(
onClick = { onClickInvoked.invoke() },
modifier = Modifier.fillMaxWidth(),
shape = RoundedCornerShape(10.dp),
color = MaterialTheme.colors.onBackground, // normally it is black on Light theme
indication = rememberRipple(color = Color.White) // color for your ripple, you can use other suitable MaterialTheme.colors for your case to support Light/Dark mode
) {
Box(modifier = Modifier.padding(horizontal = 10.dp, vertical = 15.dp)) {
// your Box content
...
}
}
有一个
Modifier.indication
,但经过测试,我发现它不能与Modifier.clickable
一起使用,所以我使用Surface
我真的不知道你的主题是否有问题。我尝试通过材质主题,波纹会正常显示
MaterialTheme() {
Box(
modifier = Modifier
.fillMaxWidth()
.wrapContentHeight()
.clip(RoundedCornerShape(10.dp))
.background(MaterialTheme.colors.secondary)
.clickable(onClick = { t = "My text" })
.padding(horizontal = 10.dp, vertical = 15.dp)
) {
Text(
text = t,
modifier = Modifier
.align(Alignment.CenterStart)
.padding(end = 95.dp)
.wrapContentWidth()
.wrapContentHeight(),
color = MaterialTheme.colors.primary
)
Image(
painter = painterResource(R.drawable.ic_launcher_foreground),
modifier = Modifier
.align(Alignment.CenterEnd)
.padding(end = 20.dp)
.size(60.dp),
contentDescription = ""
)
}
}
像这样提取扩展函数很好:
fun Modifier.setRippleEffectOnClick(onClick: () -> Unit): Modifier = composed {
clickable(
interactionSource = remember { MutableInteractionSource() },
indication = rememberRipple(color = Color.Green),
onClick = onClick
)
}
因此,您可以将 clickable 替换为 setRippleEffectOnClick:
@Composable
private MyBox(onClickInvoked: () -> Unit) {
MyAppTheme(isSystemInDarkTheme()) {
Box(
modifier = Modifier
.fillMaxWidth()
.wrapContentHeight()
.clip(RoundedCornerShape(10.dp))
.background(MaterialTheme.colors.onBackground)
.setRippleEffectOnClick { onClickInvoked.invoke() }
// .clickable(onClick = { onClickInvoked.invoke() })
.padding(horizontal = 10.dp, vertical = 15.dp)
) {
Text(
text = "My text",
modifier = Modifier
.align(Alignment.CenterStart)
.padding(end = 95.dp)
.wrapContentWidth()
.wrapContentHeight(),
color = MaterialTheme.colors.primary
)
Image(
painter = painterResource(R.drawable.icon),
modifier = Modifier
.align(Alignment.CenterEnd)
.padding(end = 20.dp)
.size(60.dp)
)
}
}
}