Prepared By : Prof. Uday Shah (HOD-IT)
Kotlin &
Android Development Glossary
Notifications
- NotificationManager : System
service to manage and display notifications.
- NotificationCompat.Builder : Helper
class for building notifications with backward compatibility.
- Custom
Notification : User-defined design for notifications.
- Media
Style Notification : Notification with media controls (play, pause,
etc.).
- Progress
Notification : Shows progress (e.g., download percentage).
- Persistent
Notification (Foreground Service) : Always running notification,
tied to ongoing service.
- PendingIntent : Token
for future action triggered by notification.
- TaskStackBuilder : Helps
create proper back stack for activities launched from notifications.
Data Persistence & Storage
- SharedPreferences :
Key-value storage for small data.
- Internal
Storage : Private file storage inside app’s memory.
- External
Storage : Shared file storage (SD card or device storage).
- SQLite
Database : Local relational database for structured storage.
- CRUD
(Create, Read, Update, Delete) : Basic database operations.
- Room
Database : Modern SQLite wrapper with simpler API and
lifecycle support.
Networking & APIs
- Permissions : App
rights (e.g., internet, storage, camera).
- Web
Services : Online services used to fetch/send data.
- HTTP
Requests : Communication with servers using methods (GET,
POST, etc.).
- Retrofit :
Type-safe HTTP client for Android.
- JSON
(JavaScript Object Notation) : Lightweight data format for
APIs.
- XML (Extensible Markup Language) : Alternative structured data format.
Modern Kotlin Tools
- Moshi : Library
for JSON parsing in Kotlin.
- Gson : Google’s JSON parsing library.
- Coroutine :Lightweight concurrency mechanism for async tasks.
- suspend
Function : Function that can be paused/resumed in
coroutines.
- Dispatchers
(IO/Main/Default) : Define where coroutine runs (background or main
thread).
- withContext : Switch
coroutine context.
App Publishing & Monetization
- App
Monetization : Earning from apps (ads, in-app purchases, paid
apps).
- Versioning : Managing app versions (versionCode, versionName).
- App
Signing : Securing APK with digital key before publishing.
- Google
Play Publishing : Releasing apps on Play Store.
Jetpack & Components
- Jetpack : Android
libraries for modern app development.
- CameraX : Jetpack
library for camera apps.
- Sensor
Manager: Manages device sensors (accelerometer, gyroscope,
etc.).
- ViewModel : Stores
and manages UI-related data.
- LiveData : Observable data holder for UI.
- WorkManager : Schedules background tasks reliably.
Core Kotlin Concepts
- val : Immutable variable (cannot change).
- var: Mutable
variable (can change).
- fun : Function keyword.
- class: Blueprint for objects.
- object : Singleton instance or object declaration.
- data class : Class
for storing data with auto-generated methods.
- sealed
class : Restricts class hierarchy for controlled type
handling.
- interface : Defines
a contract of methods to be implemented.
- enum class : Defines
constants in structured form.
- Extension
Function: Adds new function to existing class.
- Null
Safety (? and !!) : Prevents null pointer exceptions.
- Elvis
Operator (?:) : Returns
default value if null.
- Lambda : Anonymous function for concise code.
- Higher-order
Function : Function that takes/returns another function.
