在视图中输入星期几的简单方法是什么？

问题描述

所以我有 3 个文本视图来显示未来 3 天的预测。我使用视图绑定来绑定视图，但我觉得有一种更简单的编写方法，但我想不出解决方案。如何遍历一周中的几天并相应地设置文本视图？

'''
// getting day of the week
private val dayOfWeek: DayOfWeek = LocalDate.Now().dayOfWeek
// getting day of week as int value
private val dayNum: Int = dayOfWeek.value

'''

     ''' // 1 = monday etc

      private fun forecastDays() {


        when (dayNum){
            // forecast of next three days
            1 -> {
                binding.tvDay1.text = "Tuesday"
                binding.tvDay2.text = "Wednesday"
                binding.tvDay3.text = "Thursday"
            }
            2 -> {
                binding.tvDay1.text = "Wednesday"
                binding.tvDay2.text = "Thursday"
                binding.tvDay3.text = "Friday"
            }
            3 -> {
                binding.tvDay1.text = "Thursday"
                binding.tvDay2.text = "Friday"
                binding.tvDay3.text = "Saturday"
            }
            4 -> {
                binding.tvDay1.text = "Friday"
                binding.tvDay2.text = "Saturday"
                binding.tvDay3.text = "Sunday"
            }
          .. etc

'''

解决方法

我猜你可能可以用 DateFormatter 做到这一点。这是另一种使用地图的方法。您可以将 daysMap 设为常量。

val daysMap = mapOf(
    1 to "Sunday",2 to "Monday",3 to "Tuesday",4 to "Wednesday",5 to "Thursday",6 to "Friday",7 to "Saturday"
)
val dayOfWeek: DayOfWeek = LocalDate.now().dayOfWeek
val dayNum: Int = dayOfWeek.value
binding.tvDay1.text = daysMap[(dayNum + 1) % 7]
binding.tvDay2.text = daysMap[(dayNum + 2) % 7]
binding.tvDay3.text = daysMap[(dayNum + 3) % 7]

,

DayOfWeek 是一个 Enum，这意味着您可以使用序数作为索引以数字方式获取 DayOfWeek。

void
timer_sleep (int64_t ticks) 
{
  int64_t start = timer_ticks ();

  ASSERT (intr_get_level () == INTR_ON);

  struct thread *cur = thread_current();
  cur->block_ticks = ticks;
  enum intr_level old_level = intr_disable ();
  thread_block();

  intr_set_level (old_level);
  thread_yield();
}

static void
timer_interrupt (struct intr_frame *args UNUSED)
{
  ticks++;
  thread_tick ();
  thread_foreach (timer_check,NULL);
}

void 
timer_check (struct thread *thread,void *aux) {
  if (thread->status == THREAD_BLOCKED) {
    thread->block_ticks--;
    if (thread->block_ticks <= 0) {
      thread_unblock(thread);
    }
  }
}