Created
March 18, 2023 19:38
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Format and math using LocalDate, LocalTime and LocalDate time in Kotlin / Compose. Preview enabled.
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| package com.mobidawg.android.beta.studylocaldatetime | |
| import android.os.Bundle | |
| import androidx.activity.ComponentActivity | |
| import androidx.activity.compose.setContent | |
| import androidx.compose.foundation.background | |
| import androidx.compose.foundation.border | |
| import androidx.compose.foundation.layout.* | |
| import androidx.compose.material3.MaterialTheme | |
| import androidx.compose.material3.Surface | |
| import androidx.compose.material3.Text | |
| import androidx.compose.runtime.Composable | |
| import androidx.compose.ui.Alignment | |
| import androidx.compose.ui.Modifier | |
| import androidx.compose.ui.graphics.Color | |
| import androidx.compose.ui.tooling.preview.Preview | |
| import androidx.compose.ui.unit.dp | |
| import com.mobidawg.android.beta.studylocaldatetime.ui.theme.StudyLocalDateTimeTheme | |
| import java.time.LocalDate | |
| import java.time.LocalDateTime | |
| import java.time.LocalTime | |
| import java.time.format.DateTimeFormatter | |
| import java.util.* | |
| class MainActivity : ComponentActivity() { | |
| override fun onCreate(savedInstanceState: Bundle?) { | |
| super.onCreate(savedInstanceState) | |
| setContent { | |
| StudyLocalDateTimeTheme { | |
| // A surface container using the 'background' color from the theme | |
| Surface( | |
| modifier = Modifier | |
| .fillMaxSize() | |
| .padding(4.dp) | |
| .border(width = 1.dp, color = Color.Red), | |
| color = MaterialTheme.colorScheme.background, | |
| ) { | |
| FleetingTime(modifier = Modifier.background(color = Color.White)) | |
| } | |
| } | |
| } | |
| } | |
| } | |
| @Composable | |
| fun FleetingTime(modifier: Modifier) { | |
| val dateFormatter = DateTimeFormatter.ofPattern("MMM dd, ''yy", Locale.US) | |
| val dateFormatter2000 = DateTimeFormatter.ofPattern("MMM dd, yyyy", Locale.US) | |
| val dateTimeFormatter = DateTimeFormatter.ofPattern("EEEE, MMMM dd, yyyy 'at' h:mm a", Locale.US) | |
| val dateParser = DateTimeFormatter.ofPattern( "MMM dd, yyyy", Locale.US) | |
| val timeFormatterHoursMinutes = DateTimeFormatter.ofPattern("hh:mm +.s", Locale.US) | |
| val dt: LocalDateTime = LocalDateTime.now() | |
| Column( | |
| modifier | |
| .padding(8.dp) | |
| .border(width = 1.dp, color = Color.Blue), | |
| verticalArrangement = Arrangement.Center, | |
| horizontalAlignment = Alignment.CenterHorizontally | |
| ) { | |
| Text( | |
| text = "Time is fleeting. Enjoy time with your family.", | |
| modifier = Modifier.padding(bottom = 24.dp) | |
| ) | |
| // | |
| Text(text = LocalDateTime.now().toString()) | |
| Text(LocalDateTime.now().format(dateFormatter)) | |
| Text(LocalDateTime.now().toLocalDate().minusYears(66).format(dateFormatter)) | |
| Text(LocalDateTime.now().plusDays(14L).plusMinutes(22L).toString()) | |
| Text(LocalDateTime.now().plusDays(14L).plusMinutes(22L).format(dateFormatter)) | |
| Text(LocalDateTime.now().plusDays(14L).plusMinutes(22L).format(timeFormatterHoursMinutes)) | |
| Text(LocalDateTime.now().plusDays(14L).plusMinutes(22L).format(dateFormatter2000)) | |
| Text(LocalDateTime.now().format(timeFormatterHoursMinutes)) | |
| Text(LocalDateTime.now().toLocalTime().plusMinutes(45).format(timeFormatterHoursMinutes)) | |
| Text(LocalDateTime.now().format(dateTimeFormatter)) | |
| Spacer(modifier = Modifier.height(16.dp)) | |
| Text(text = LocalDate.now().toString()) | |
| localDateFromDatestamp(LocalDate.now().toEpochDay())?.let { Text(it.format(dateFormatter2000)) } | |
| localDateFromDatestamp(LocalDate.now().toEpochDay() + 1000L)?.let { Text( it.format(dateFormatter)) } | |
| localDateFromDatestamp(LocalDate.now().toEpochDay() + 100L)?.let { Text( it.format(dateFormatter)) } | |
| localDateFromDatestamp(LocalDate.now().toEpochDay() + 10L)?.let { Text( it.format(dateFormatter)) } | |
| localDateFromDatestamp(LocalDate.now().toEpochDay() + 1L)?.let { Text( it.format(dateFormatter)) } | |
| localDateFromDatestamp(LocalDate.now().toEpochDay() + 2L)?.let { Text( it.format(dateFormatter)) } | |
| localDateFromDatestamp(LocalDate.now().toEpochDay() + 3L)?.let { Text( it.format(dateFormatter)) } | |
| localDateFromDatestamp(LocalDate.now().toEpochDay() + 5L)?.let { Text( it.format(dateFormatter)) } | |
| localDateFromDatestamp(LocalDate.now().toEpochDay() + 8L)?.let { Text( it.format(dateFormatter)) } | |
| localDateFromDatestamp(LocalDate.now().toEpochDay() + 13L)?.let { Text( it.format(dateFormatter)) } | |
| // | |
| Spacer(modifier = Modifier.height(16.dp)) | |
| Text(text = LocalTime.now().toString()) | |
| localTimeFromDatestamp(LocalTime.now().toSecondOfDay() + 1L)?.let { Text( it.format(timeFormatterHoursMinutes)) } | |
| localTimeFromDatestamp(LocalTime.now().toSecondOfDay() + 2L)?.let { Text( it.format(timeFormatterHoursMinutes)) } | |
| localTimeFromDatestamp(LocalTime.now().toSecondOfDay() + 3L)?.let { Text( it.format(timeFormatterHoursMinutes)) } | |
| localTimeFromDatestamp(LocalTime.now().toSecondOfDay() + 5L)?.let { Text( it.format(timeFormatterHoursMinutes)) } | |
| localTimeFromDatestamp(LocalTime.now().toSecondOfDay() + 8L)?.let { Text( it.format(timeFormatterHoursMinutes)) } | |
| localTimeFromDatestamp(LocalTime.now().toSecondOfDay() + 13L)?.let { Text( it.format(timeFormatterHoursMinutes)) } | |
| localTimeFromDatestamp(LocalTime.now().toSecondOfDay() + 60L)?.let { Text( it.format(timeFormatterHoursMinutes)) } | |
| localTimeFromDatestamp(LocalTime.now().toSecondOfDay() + (60L * 60L))?.let { Text( it.format(timeFormatterHoursMinutes)) } | |
| } | |
| } | |
| @Preview(showBackground = true) | |
| @Composable | |
| fun DefaultPreview() { | |
| StudyLocalDateTimeTheme { | |
| FleetingTime( | |
| modifier = Modifier | |
| .fillMaxSize() | |
| .padding(6.dp) | |
| .border(width = 1.dp, color = Color.Red) | |
| ) | |
| } | |
| } | |
| fun localDateFromDatestamp(value: Long?): LocalDate? { | |
| return value?.let { LocalDate.ofEpochDay(it) } | |
| } | |
| fun localTimeFromDatestamp(value: Long?): LocalTime? { | |
| return value?.let { LocalTime.ofSecondOfDay(it) } | |
| } |
Author
mobibob
commented
Mar 18, 2023
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