在 java/Kotlin/Android 中基于 TimeStamp 从 firestore 中获取数据 || 获取java中的TimeStamp与firebase中的TimeStamp进行比较

Question

案例是从 firebase firestore 获取特定日期数据，日期以 TimeStamp 格式存储在我的 firebase Firestore 中。

Answer 1

val cal = Calendar.getInstance()
    cal[Calendar.YEAR] = 2023
    cal[Calendar.MONTH] = Calendar.JANUARY
    cal[Calendar.DAY_OF_MONTH] = 16
    cal[Calendar.HOUR] = 0
    cal[Calendar.MINUTE] = 0
    cal[Calendar.SECOND] = 0
    cal[Calendar.AM_PM] = Calendar.AM

output

Timestamp(seconds=1673807400, nanoseconds=863000000)