声明

本文来自博客园，作者：观心静，转载请注明原文链接：https://www.cnblogs.com/guanxinjing/p/19316238

本文版权归作者和博客园共有，欢迎转载，但必须给出原文链接，并保留此段声明，否则保留追究法律责任的权利。

前言

这个日历用了我的博客中另一个compose的自定义滚轮，如果你需要使用它，请先将滚轮View拷贝到项目中，滚轮View的博客地址 Android开发 Jetpack_Compose WheelPicker简单的自定义滚轮选择器 - 观心静 - 博客园

效果图

使用

val isShowCalendarDialog = remember { mutableStateOf(false) }
DatePickerBottomSheet(isVisible = isShowCalendarDialog,startDate = Calendar.getInstance().apply { set(1960, 0, 1) },endDate = Calendar.getInstance(),onDateSelected = {val dataFormat = SimpleDateFormat("yyyy-MM-dd", Locale.getDefault())viewModel.userBirthday.value = dataFormat.format( it.timeInMillis)viewModel.updateBtnState()isShowCalendarDialog.value = false},onDismiss = {isShowCalendarDialog.value = false},
)

代码


import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.ModalBottomSheet
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.MutableState
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableIntStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import com.yakwatch.android.fitvibe.ui.compView.WheelPicker
import java.util.Calendar@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun DatePickerBottomSheet(isVisible: MutableState<Boolean>,initialDate: Calendar = Calendar.getInstance(),startDate: Calendar = Calendar.getInstance().apply { set(1900, 0, 1) },endDate: Calendar = Calendar.getInstance().apply { set(2100, 11, 31) },onDateSelected: (Calendar) -> Unit,onDismiss: () -> Unit
) {if (isVisible.value) {ModalBottomSheet(containerColor = MaterialTheme.colorScheme.surface,dragHandle = null,onDismissRequest = onDismiss) {var selectedYear by remember { mutableIntStateOf(initialDate.get(Calendar.YEAR)) }var selectedMonth by remember { mutableIntStateOf(initialDate.get(Calendar.MONTH) + 1) }var selectedDay by remember { mutableIntStateOf(initialDate.get(Calendar.DAY_OF_MONTH)) }// 限制年份范围val startYear = startDate.get(Calendar.YEAR)val endYear = endDate.get(Calendar.YEAR)val years = (startYear..endYear).map { it.toString() }// 限制月份范围（根据年份动态调整）val months = if (selectedYear == startYear && selectedYear == endYear) {// 同一年，月份受限于开始和结束月份(startDate.get(Calendar.MONTH) + 1..endDate.get(Calendar.MONTH) + 1).map { it.toString() }} else if (selectedYear == startYear) {// 等于开始年份，月份从开始月份到最后一个月(startDate.get(Calendar.MONTH) + 1..12).map { it.toString() }} else if (selectedYear == endYear) {// 等于结束年份，月份从1月到结束月份(1..endDate.get(Calendar.MONTH) + 1).map { it.toString() }} else {// 中间年份，月份不受限(1..12).map { it.toString() }}// 根据年月动态计算天数，并应用日期范围限制val daysInMonth = getDaysInMonth(selectedYear, selectedMonth)val days =if (selectedYear == startYear && selectedMonth == startDate.get(Calendar.MONTH) + 1) {// 等于开始年月，日期从开始日期到最后一天(startDate.get(Calendar.DAY_OF_MONTH)..daysInMonth).map { it.toString() }} else if (selectedYear == endYear && selectedMonth == endDate.get(Calendar.MONTH) + 1) {// 等于结束年月，日期从1号到结束日期(1..endDate.get(Calendar.DAY_OF_MONTH)).map { it.toString() }} else {// 其他情况，日期不受限(1..daysInMonth).map { it.toString() }}Column(modifier = Modifier.fillMaxWidth(),horizontalAlignment = Alignment.CenterHorizontally) {Spacer(modifier = Modifier.height(24.dp))Row(modifier = Modifier.fillMaxWidth().padding(horizontal = 36.dp),horizontalArrangement = Arrangement.SpaceBetween,verticalAlignment = Alignment.CenterVertically) {Text("取消",style = MaterialTheme.typography.bodyMedium,color = MaterialTheme.colorScheme.onBackground,modifier = Modifier.clickable(onClick = onDismiss))Text(text = "选择日期",style = MaterialTheme.typography.titleMedium,)Text("确定",style = MaterialTheme.typography.bodyMedium,color = MaterialTheme.colorScheme.primary,modifier = Modifier.clickable(onClick = {val calendar = Calendar.getInstance().apply {set(selectedYear, selectedMonth - 1, selectedDay)}// 验证选择的日期是否在范围内if (calendar.timeInMillis >= startDate.timeInMillis &&calendar.timeInMillis <= endDate.timeInMillis) {onDateSelected(calendar)}}))}Spacer(modifier = Modifier.height(24.dp))Row(modifier = Modifier.fillMaxWidth(),horizontalArrangement = Arrangement.SpaceEvenly) {// 年份选择器Column(modifier = Modifier.weight(1f),horizontalAlignment = Alignment.CenterHorizontally) {WheelPicker(items = years,defaultSelectedIndex = years.indexOf(selectedYear.toString()).coerceAtLeast(0).coerceAtMost(years.size - 1),onSelectedIndex = { index ->selectedYear = years[index].toInt()},itemHeight = 40.dp,itemFontSize = 18.sp,visibleItemsCount = 5)}// 月份选择器Column(modifier = Modifier.weight(1f),horizontalAlignment = Alignment.CenterHorizontally) {WheelPicker(items = months,defaultSelectedIndex = months.indexOf(selectedMonth.toString()).coerceAtLeast(0).coerceAtMost(months.size - 1),onSelectedIndex = { index ->selectedMonth = months[index].toInt()},itemHeight = 40.dp,itemFontSize = 18.sp,visibleItemsCount = 5)}// 日期选择器Column(modifier = Modifier.weight(1f),horizontalAlignment = Alignment.CenterHorizontally) {WheelPicker(items = days,defaultSelectedIndex = days.indexOf(selectedDay.toString()).coerceAtLeast(0).coerceAtMost(days.size - 1),onSelectedIndex = { index ->selectedDay = days[index].toInt()},itemHeight = 40.dp,itemFontSize = 18.sp,visibleItemsCount = 5)}}Spacer(modifier = Modifier.height(24.dp))}}}
}private fun getDaysInMonth(year: Int, month: Int): Int {val calendar = Calendar.getInstance().apply {set(Calendar.YEAR, year)set(Calendar.MONTH, month - 1)set(Calendar.DAY_OF_MONTH, 1)}return calendar.getActualMaximum(Calendar.DAY_OF_MONTH)
}

end