我可以翻译该内容。以下是您需要翻译的内容:
这是我的PrefixFilter()函数:
我们可以这样将颜色动画化:
我有一个字符串“(+91)”。如何使其在某些操作下逐渐淡入,而在其他操作下逐渐淡出。我在我的Textfield中使用“(+91)”作为前缀,并借助visualTransformation实现。
这是我用于Textfield的代码:
TextField(
value = query3.value,
onValueChange = { newValue ->
query3.value = newValue
mobErrorVisible.value = false
},
visualTransformation = if (showCode){
PrefixTransformation("(+91)")} //Animate (+91)
else
PrefixTransformation(""),
label = {
Text(
"Mobile Number",
color = colorResource(id = R.color.bright_green),
fontFamily = FontFamily(Font(R.font.poppins_regular)),
fontSize = with(LocalDensity.current) { dimensionResource(id = R.dimen._12ssp).toSp() })
},
interactionSource = interactionSource,
keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
textStyle = TextStyle(
textAlign = TextAlign.Start,
color = colorResource(id = R.color.bright_green),
fontFamily = FontFamily(Font(R.font.poppins_regular)),
fontSize = with(LocalDensity.current) { dimensionResource(id = R.dimen._16ssp).toSp() }
),
modifier = Modifier
.drawBehind {
val strokeWidth = indicatorWidth.value * density
val y = size.height - strokeWidth / 2
drawLine(
indicatorColor,
Offset(TextFieldPadding.toPx(), y),
Offset(size.width - TextFieldPadding.toPx(), y),
strokeWidth
)
}
.focusRequester(focusRequester)
.onFocusChanged { showCode = (it.isFocused || query3.value != "")}
.constrainAs(phone) {
top.linkTo(glPhone)
bottom.linkTo(glPhoneBottom)
start.linkTo(glLeft)
end.linkTo(glRight)
width = Dimension.fillToConstraints
height = Dimension.fillToConstraints
},
colors = TextFieldDefaults.textFieldColors(
backgroundColor = Color.Transparent,
focusedIndicatorColor = Transparent,
unfocusedIndicatorColor = Transparent,
disabledIndicatorColor = Transparent
)
)
这是我的 PrefixTransformation 类:
class PrefixTransformation(val prefix: String) : VisualTransformation {
override fun filter(text: AnnotatedString): TransformedText {
return PrefixFilter(text, prefix)
}
}
这是我的PrefixFilter()函数:
fun PrefixFilter(number: AnnotatedString, prefix: String): TransformedText {
var out = prefix + " " + number.text
val prefixOffset = prefix.length
val numberOffsetTranslator = object : OffsetMapping {
override fun originalToTransformed(offset: Int): Int {
return offset + prefixOffset
}
override fun transformedToOriginal(offset: Int): Int {
if (offset <= prefixOffset-1) return prefixOffset
return offset - prefixOffset
}
}
return TransformedText(AnnotatedString(out), numberOffsetTranslator)
}
我们可以这样将颜色动画化:
val color = remember { Animatable(Color.Gray) }
LaunchedEffect(ok) {
color.animateTo(if (ok) Color.Green else Color.Red)
}
Box(Modifier.fillMaxSize().background(color.value))
但是我们如何对字符串进行动画处理?
Text()
添加动画效果。 - CommonsWare