is the center of religious activities at the district level.
The lack of information in spreading religious activ-
ities is a problem that must be overcome. To over-
come the lack of information dissemination of reli-
gious activities at the Great Mosque Islamic Center
Rokan Hulu, then an application for religious activ-
ity information is made using the push notification
method. So, users immediately get notifications au-
tomatically on their smartphone when information on
religious activities entered by the admin or adminis-
trator of the mosque. The Limitation of the problems
in this research is (1) This application is made for
smartphones that use the Android operating system;
supports Android 4.4 (KitKat) and the latest version.
(2) The push notification method in this application
uses the Firebase Cloud Messaging (FCM) service.
(3) Application management is done through the web
by the admin.
2 LITERATURE REVIEW
To complete the research process, a theoretical basis
is needed as the basis for research work. Fundamental
theories are taken from books, theses, previous stud-
ies, and scientific journals.
2.1 Web
The web is a collection of web pages, usually summa-
rized in a domain that is located on the World Wide
Web (WWW) on the internet (Jasmadi, 2004). The
web becomes a computer network-based information
media that can be accessed anywhere at a relatively
low cost. The web is a form of implementation of
web programming languages.
2.2 Android Operating System
Android is one of the mobile phone operating sys-
tems. Other mobile phone operating systems such as
Windows Mobile, iPhone, Symbian, and many more.
This Android operating system runs by prioritizing
core applications without involving third parties even
though the potential of third parties is greater. So that
third-party applications have distribution limitations
in getting original data from mobile phones, commu-
nicating between processes and the limitations of ap-
plication distribution for their platforms (Stephanus,
2011). The Android architecture consists of applica-
tions and widgets, application framework, libraries,
android run time, and Linux kernel.
2.3 Firebase
Firebase is Backend as a Service (BaaS) which is
currently owned by Google. Firebase is a web ap-
plication platform that helps developers build high-
quality applications by storing data in the format of
JavaScript Object Notation (JSON) that does not use
queries to insert, update, delete or add data to it
(Khawas and Pritam, 2018). Firebase provides a vari-
ety of services, one of which is a push notification fea-
ture called Firebase Cloud Messaging (FCM). FCM
is a development of Google Cloud Messaging (GCM)
that provides services so that developers can send no-
tification messages to Android devices from servers
(Nurzam et al., 2017)).
2.4 Push Notification
Push notification is a service that is widely used for
notification via short messages on smartphones (Sid-
dik and Nasution, 2018). The application that will be
designed is an application that can send push notifi-
cations which will later be developed in various fields
according to user needs. Lack of knowledge in the
dissemination and notification of information in real-
time, the information obtained is not up-to-date, so
that in various situations and conditions the informa-
tion provided is outdated.
Push notification is one of the services that can
overcome these problems so that no more recent in-
formation is not delivered. With the use of this ser-
vice, every updated information will immediately be
sent as a notification message, so the latest informa-
tion will not be missed. Push notification service is
generally widely applied to mobile applications such
as Android and other operating systems.
2.5 The Great Mosque Islamic Center
Rokan Hulu
The Great Mosque Islamic Center Rokan Hulu is lo-
cated at coordinates n 000 53 ’44.3 ”e. 1000 18 ’31.5’.
The background of the establishment of this mosque
was based on the brilliant idea of the Rokan Hulu Re-
gent, which was due to the absence of a representative
mosque to be used as a prayer place and district-level
religious activities. One district mosque that can be
used as a center of activity as well as a symbol of Is-
lam in Rokan Hulu, moreover this area is nicknamed
the Country of Thousand Suluk. Thousand Suluk is
an area where many people carry out dhikr in a partic-
ular place (surau) which is called by bersuluk (Badan
Pengelola Masjid Agung Islamic Center Rokan Hulu,
2016).
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