Adhan Java

Adhan Java is a well tested and well documented library for calculating Islamic prayer times. Adhan Java is written to be compatible with Java and Android devices of all api versions. It compiles against Java 7 to ensure compatibility with Android. It has a small method overhead, and has no external dependencies.

All astronomical calculations are high precision equations directly from the book “Astronomical Algorithms” by Jean Meeus. This book is recommended by the Astronomical Applications Department of the U.S. Naval Observatory and the Earth System Research Laboratory of the National Oceanic and Atmospheric Administration.

Implementations of Adhan in other languages can be found in the parent repo Adhan.

Usage

Gradle

implementation 'com.batoulapps.adhan:adhan:1.2.1'

Maven

<dependency>
   <groupId>com.batoulapps.adhan</groupId>
   <artifactId>adhan</artifactId>
   <version>1.2.1</version>
</dependency>

To get prayer times, initialize a new PrayerTimes object passing in coordinates, date, and calculation parameters.

PrayerTimes prayerTimes = new PrayerTimes(coordinates, date, params);

Initialization parameters

Coordinates

Create a Coordinates object with the latitude and longitude for the location you want prayer times for.

Coordinates coordinates = new Coordinates(35.78056, -78.6389);

Date

The date parameter passed in should be an instance of the DateComponents object. The year, month, and day values need to be populated. All other values will be ignored. The year, month and day values should be for the local date that you want prayer times for. These date values are expected to be for the Gregorian calendar. There's also a convenience method for converting a java.util.Date to DateComponents.

DateComponents date = new DateComponents(2015, 11, 1);
DateComponents date = DateComponents.from(new Date());

Calculation parameters

The rest of the needed information is contained within the CalculationParameters class. Instead of manually initializing this class, it is recommended to use one of the pre-populated instances in the CalculationMethod class. You can then further customize the calculation parameters if needed.

CalculationParameters params =
     CalculationMethod.MUSLIM_WORLD_LEAGUE.getParameters();
params.madhab = Madhab.HANAFI;
params.adjustments.fajr = 2;

Parameter	Description
method	CalculationMethod name
fajrAngle	Angle of the sun used to calculate Fajr
ishaAngle	Angle of the sun used to calculate Isha
ishaInterval	Minutes after Maghrib (if set, the time for Isha will be Maghrib plus ishaInterval)
madhab	Value from the Madhab object, used to calculate Asr
highLatitudeRule	Value from the HighLatitudeRule object, used to set a minimum time for Fajr and a max time for Isha
adjustments	JavaScript object with custom prayer time adjustments in minutes for each prayer time

CalculationMethod

Value	Description
MUSLIM_WORLD_LEAGUE	Muslim World League. Fajr angle: 18, Isha angle: 17
EGYPTIAN	Egyptian General Authority of Survey. Fajr angle: 19.5, Isha angle: 17.5
KARACHI	University of Islamic Sciences, Karachi. Fajr angle: 18, Isha angle: 18
UMM_AL_QURA	Umm al-Qura University, Makkah. Fajr angle: 18, Isha interval: 90. Note: you should add a +30 minute custom adjustment for Isha during Ramadan.
DUBAI	Method used in UAE. Fajr and Isha angles of 18.2 degrees.
QATAR	Modified version of Umm al-Qura used in Qatar. Fajr angle: 18, Isha interval: 90.
KUWAIT	Method used by the country of Kuwait. Fajr angle: 18, Isha angle: 17.5
MOONSIGHTING_COMMITTEE	Moonsighting Committee. Fajr angle: 18, Isha angle: 18. Also uses seasonal adjustment values.
SINGAPORE	Method used by Singapore. Fajr angle: 20, Isha angle: 18.
NORTH_AMERICA	Referred to as the ISNA method. This method is included for completeness but is not recommended. Fajr angle: 15, Isha angle: 15
KUWAIT	Kuwait. Fajr angle: 18, Isha angle: 17.5
OTHER	Fajr angle: 0, Isha angle: 0. This is the default value for method when initializing a CalculationParameters object.

Madhab

Value	Description
SHAFI	Earlier Asr time
HANAFI	Later Asr time

HighLatitudeRule

Value	Description
MIDDLE_OF_THE_NIGHT	Fajr will never be earlier than the middle of the night and Isha will never be later than the middle of the night
SEVENTH_OF_THE_NIGHT	Fajr will never be earlier than the beginning of the last seventh of the night and Isha will never be later than the end of the first seventh of the night
TWILIGHT_ANGLE	Similar to SEVENTH_OF_THE_NIGHT, but instead of 1/7, the fraction of the night used is fajrAngle/60 and ishaAngle/60

Prayer Times

Once the PrayerTimes object has been initialized it will contain values for all five prayer times and the time for sunrise. The prayer times will be Date object instances initialized with UTC values. To display these times for the local timezone, a formatting and timezone conversion formatter should be used, for example java.text.SimpleDateFormat.

SimpleDateFormat formatter = new SimpleDateFormat("hh:mm a");
formatter.setTimeZone(TimeZone.getTimeZone("America/New_York"));
formatter.format(prayerTimes.fajr);

Qibla

As of version 1.1.0, this library provides a Qibla class for getting the qibla for a given location.

Coordinates coordinates = new Coordinates(latitude, longitude);
Qibla qibla = new Qibla(coordinates);
// qibla.direction is the qibla direction

SunnahTimes

In version 1.2.0, the library provides a SunnahTimes class.

SunnahTimes sunnahTimes = new SunnahTimes(prayerTimes);
// sunnahTimes.middleOfTheNight is the midpoint between Maghrib and Fajr
// sunnahTimes.lastThirdOfTheNight is the last third between Maghrib and Fajr

Full Example

See an example in the samples module.