如何在 kotlin 或 java 中计算祈祷时间？

Question

所以我正在使用这个类： http://praytimes.org/code/git/?a=viewblob&p=PrayTimes&h=093f77d6cc83b53fb12e9900803d5fa75dacd110&hb=HEAD&f=v1/java/PrayTime.java 为了获取祈祷时间，我想将它与我使用位置权限制作的纬度和经度一起使用，但是当我更改时区的值时，我不会给我准确的城市祈祷时间。 有没有办法让时区自动工作？所以如果摩洛哥的一个人使用我的应用程序，时区会自动更改为摩洛哥时区，所以祈祷时间会给出准确的时间？同样，如果一个人住在沙特、伊拉克、西班牙……等等

提前致谢。

**我的代码有问题 **

@SuppressLint("MissingPermission")
private fun getLastLocation() {
    if (checkPermission()) {
        if (isLocationEnabled()) {

            mFusedLocationClient.lastLocation.addOnCompleteListener(this) { task ->
                var location: Location? = task.result
                if (location == null) {
                    requestNewLocationData()
                } else {

                    val resultimeZone = TimezoneMapper.latLngToTimezoneString(
                        location.latitude,
                        location.longitude
                    )
                    findViewById<TextView>(R.id.cityName).text = resultimeZone
                    val latitude: Double = location.latitude
                    val longitude: Double = location.longitude
                    var timeZone = 3.00
                    val timeZoneId = timeZone.toString()
                    val prayTime = praytime()
                    prayTime.timeFormat = prayTime.time12 // getTime12 is protected
                    prayTime.calcMethod = prayTime.makkah // Makkah
                    prayTime.asrJuristic = prayTime.shafii // Shafii (standard)
                    prayTime.adjustHighLats = prayTime.angleBased
                    prayTime.timeZone = prayTime.timeZone
                    prayTime.computeMidDay(prayTime.dhuhrMinutes.toDouble())
                    val offsets = intArrayOf(
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0
                    ) // {Fajr,Sunrise,Dhuhr,Asr,Sunset,Maghrib,Isha}

                    prayTime.tune(offsets)
                    val cal = Calendar.getInstance(TimeZone.getTimeZone(timeZoneId))
                    cal.time = Date()


                    val times: ArrayList<String> =
                        prayTime.getPrayerTimes(
                            cal,
                            latitude,
                            longitude,
                            timeZone
                        )
                    findViewById<TextView>(R.id.Fajr).text = times.get(0)
                    findViewById<TextView>(R.id.sabah).text = times.get(1)
                    findViewById<TextView>(R.id.dhuhr).text = times.get(2)
                    findViewById<TextView>(R.id.AzanTime).text = times.get(3)
                    findViewById<TextView>(R.id.maghreb).text = times.get(4)
                    findViewById<TextView>(R.id.Esha).text = times.get(6)

                }
            }
        } else {
            Toast.makeText(this, "Turn on location", Toast.LENGTH_LONG).show()
            val intent = Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS)
            startActivity(intent)
        }
    } else {
        requestPermission()
    }

您可以将 Java 用于示例

Answer 1

要获取时区，您可以轻松使用此库：https://raw.githubusercontent.com/drtimcooper/LatLongToTimezone/master/src/main/java/com/skedgo/converter/TimezoneMapper.java 之后使用 TimeZone.getTimeZone 也可用于计算祈祷时间，此站点的代码很有用 http://praytimes.org/code/

Answer 2

终于过了一段时间，我现在能够解决这个问题。

首先你需要这个库来获取时区，

TimeZoneMapper

然后你应该将这个库链接到你的时区变量，然后你应该像这样将时区减去 4：

 var TimeId = TimezoneMapper.latLngToTimezoneString(location.latitude, location.longitude)

                val gmt = TimeZone.getTimeZone(TimeId).getDisplayName(false, TimeZone.SHORT)

                val z1 = gmt.substring(4)
                val z = z1.replace(":", ".")
                val zo = z.toDouble()

就是这样

完整代码

                    var TimeId = TimezoneMapper.latLngToTimezoneString(location.latitude, location.longitude)

                    val gmt = TimeZone.getTimeZone(TimeId).getDisplayName(false, TimeZone.SHORT)

                    val z1 = gmt.substring(4)
                    val z = z1.replace(":", ".")
                    val zo = z.toDouble()
                    val latitude: Double = location.latitude
                    val longitude: Double = location.longitude
  val timeZoneId = TimeZone.getAvailableIDs()
                    val prayTime = praytime()
                    prayTime.timeFormat = prayTime.time12 // getTime12 is protected
                    prayTime.calcMethod = prayTime.makkah // Makkah
                    prayTime.asrJuristic = prayTime.shafii // Shafii (standard)
                    prayTime.adjustHighLats = prayTime.angleBased
                    // my codes
                    prayTime.timeZone = prayTime.timeZone1
                    prayTime.setFajrAngle(18.5)

                    prayTime.computeMidDay(prayTime.dhuhrMinutes.toDouble())
                    val offsets = intArrayOf(
                        0,
                        0,
                        0,
                        0,
                        0,
                        0,
                        0
                    ) // {Fajr,Sunrise,Dhuhr,Asr,Sunset,Maghrib,Isha}

                    prayTime.tune(offsets)
                    val cal = Calendar.getInstance(TimeZone.getTimeZone(timeZoneId.toString()))
                    val now = Date()
                    cal.time = now



                        val times: ArrayList<String> =
                            prayTime.getPrayerTimes(
                                cal, latitude, longitude, zo
                            )
                        findViewById<TextView>(R.id.Fajr).text = times.get(0)
                        findViewById<TextView>(R.id.sabah).text = times.get(1)
                        findViewById<TextView>(R.id.dhuhr).text = times.get(2)
                        findViewById<TextView>(R.id.AzanTime).text = times.get(3)
                        findViewById<TextView>(R.id.maghreb).text = times.get(4)
                        findViewById<TextView>(R.id.Esha).text = times.get(6)