Abdullah Al Hasan

Digital Survey App is a part of whole survey system. In a traditional way, a company assign some surveyors to collect data from respondents using paper and pen. There are some questions in text and multiple choice format on a paper form. After interviews surveyors submit those papers and then all data have to enter an excel sheet or other digital format.

Setting questionnaire, data collection both features are included in our Survey System. There are two parts of this system. They are: Web Admin Panel and Android App.

Web Admin Panel

• Admin can create any number of questionnaire
• Question type can be: Text, Radio Button or Checkbox
• Create surveyors/users who will use Android App to collect data
• Assign users to particular survey project. A user can be assigned into multiple survey project. Also, multiple users can be assigned into the same project
• User's location tracking on Google Map
• Export survey data as an excel sheet

Android App

• Login with provided credential by admin
• User can access all survey projects those are assigned to him
• After completing data collection of a respondent App user can submit to remote server
• If user wants, he can save those data to local database for further submission
• User can attach a photo with every survey form
• In background, App collects user's GPS location
• How much time was needed to complete a survey? It will track in background and send to server with servey data

Used technologies/libraries/etc

• Laravel framework for Admin panel
• REST API for App and server communication
• Volley network library in Android App
• Data transfer as JSON
• SQLite for local database
• GPS location
• Default camera

My Role

[Team lead and developer]

• All network related works using Volley (login, data send and recieve)
• JSON parse
• Create data input form in run time using Java
• Get GPS locaion

The client was Keystone Business Support Company Ltd.

App of Ramadan is a free App. We developed it's 1st version in 2015 for Bangladeshi Muslim people.

This app is available on Google Play Store.

App Features

• On Home Activity: show current date, location, Sehri and Iftaar time of the date, count down timer of next event (Sehri or Iftaar)
• Sehri and Iftaar time dynamically calculate based on district
• Alarm for Sehri and Iftaar
• Daily offline Hadith notification
• Online audio Quran of 20 Qari
• Digital Tasbeeh
• Some static information like Quran, Hadith and Mas'ala

Used technologies/libraries/etc

• Threading for count down timer
• GPS location
• Reverse Geocoding and Location API for getting district name
• Volley network library
• Broadcast receiver for notification
• SharedPreference to store a small size of data
• Service for playing audio in background

My Role

[Team lead and developer]

• Network call
• JSON parse
• GPS and Reverse Geocoding
• Date and location wise Sehri-Iftaar time calculation
• Static data manage and show

Complain Management App was for Bangladesh Air Force Staff Quarter. We developed this Complain Management System as a 3^rd party developer.

The traditional way of complain management of their colony was full manual process. Residents of colony calls to authority and says their complain like "Electricity problem", "Gas line problem" etc. We automated the whole system. There are two parts of this system. Web admin panel and Android App.

Web Admin Panel

• Admin can create complain categories and sub-categories (Ex: Furniture problem, Vehicle problem)
• Create user account with a random PIN and user information
• After submission any complain, admin can check and take action
• Complain status can be changed (Ex: pending, processing, completed) and specific user can see the status
• View statics using pie chart

Android App

• Login with provided PIN by admin
• User can access all problem categories and sub-categories
• User select a problem and can add a description
• User can attach a photo
• User can give feedback of his problem
• User can update his profile
• Can check previous complains submitted by him

Used technologies/libraries/etc

• Laravel framework for Admin panel
• REST API for App and server communication
• Volley network library in Android App
• Data transfer as JSON
• SQLite for local database
• Default camera

My Role

[Team lead and developer]

• All network related works using Volley (login, data send and recieve)
• JSON parse
• Create data input form in run time using Java

Editorial Word is a free App. It's an educational app for BCS, GRE and others first calss job candidates. Using this App users can learn the vocabulary of The Daily Star editorial's. Also can take MCQ test on those new words.

This app is available on Google Play Store.

App Features

• On Home Activity: show a calendar view
• To learn the vocabulary of a particular date user has to click on that date
• Important and relatively hard word list will show
• Show English to Bengali meaning
• Text to speach of English words
• Read all editorials of The Daily Star in a smart view (not WebView)
• MCQ test: English to Bengali and Bengali to English
• Create study plan list with any words
• Daily offline notification with one word and meaning
• Daily vocabulary update and give push notification

Used technologies/libraries/etc

• Material-Calendar-View library
• Expandable-Layout library for showing editorial
• CardView and RecyclerView
• Firebase Realtime Database
• Firebase Push Notification
• SQLite local database
• jsoup library for web scraping

My Role

[Developer]

• UI and UX
• Material CalendarView Library
• CardView and RecyclerView
• Firebase Push notification (App side and PHP backend)
• Web scraping (editorial and image) with jsoup library
• Showing all editorials using Expandable-Layout

Islamic Song - SOSAS is a client App. We developed it for TechnoHaat.

This app is available on Google Play Store.

App Features

• Some audio and video song
• Audio comes from remote server and video comes from youtube
• Audio is downloadable and can listen offline
• Any audio song can set as phone ringtone

Used technologies/libraries/etc

• Volley network library
• Youtube API
• Service, to play audio in background

My Role

[Team lead and developer]

• Network call
• JSON parse
• Service for playing audio

Exam App is a part of whole MCQ exam system. Any teachers or institutions can host quiz exam for thier students. Only assigned students can participate on particular exam.

Admin/teacher will set questionnaire from web dashboard and students will take exam from Android App.

Web Admin Panel

• Admin can create any number of exam
• Every exam contains multiple questions
• Answer type can be: Radio Button or Checkbox
• Create students who will use Android App to take exam
• Assign students to particular survey project. A student can be assigned into multiple exam of different teachers. Also, multiple students can be assigned into the same project
• After finishing the exam time, student can get thier results via App
• Admin can see the statics of student exam

Android App

• Registration and login
• Student can access all exams those are assigned to him
• Exams will start at right time (time fixed by admin)
• After finishing the exam, student can submit to remote server
• If he has no internet connection, he can save those exam data to local database for further submission
• After submission, student can see his result
• Student can see the right and wrong answer of his previous exams

Used technologies/libraries/etc

• Laravel framework for Admin panel
• REST API for App and server communication
• Retrofit network library in Android App
• Data transfer as JSON
• SQLite for local database

My Role

The full Android App is developed by me.

There are some Android tutorial blog posts on my personal blog site. Those articles and related GitHub links are given below.

Android App Development Guideline

• Blog Post

Retrofit Network Library

• Blog Post
• GitHub

Firebase Push Notification with PHP Backend

• Blog Post
• GitHub

ProGuard Tool to prevent reverse engineering your Android App

• Blog Post

CollapsingToolbarLayout for Awesome User Interface

• Blog Post
• GitHub

Expandable Layout Library

• Blog Post
• GitHub

CardView & RecyclerView: Horizontal and Vertical Scroller

• Blog Post
• GitHub

JSOUP library for web scraping

• Blog Post
• GitHub

Android Count Down Timer

• Blog Post
• GitHub

What is ADB? Connect your real device with Android Studio over WiFi

• Blog Post

Learn Android Logger Library for pretty logger

• Blog Post

There are some basic data structure tutorial posts on my personal blog site. The topics are given below.

• General Concept
• Array
• Stack
• Queue
• Linked List
• Tree

There are some basic algorithm tutorial posts on my personal blog site. The topics are given below.

• General Concept
• Searching
• Sorting
• Graph Algorithm