AndroidDevelopmentRoadmap.md

Roadmap to Learn Android App Development

Programming

• Java
• Kotlin

Android Studio

• Android Studio IDE Overview
• Project Structure
  • Java/Kotlin
  • XML
  • .gradle files

Android Components

• Activity
  • Activity Lifecycle
  • Tasks & Back Stack
• Service
• Broadcast Receiver
• Content Provider

Intents

• Types of Intent
  • Implicit
  • Explicit
• Intent Filter

Static User Interface

• View
  • Button, ImageView, TextView, EditText, etc.
• ViewGroup
  • LinearLayout, RelativeLayout, FrameLayout, ConstraintLayout

Dynamic User Interface

• RecyclerView
• ViewPager
• Spinner

Custom View

• Canvas
• Bitmap
• Paint

UI Resources

• Drawables
• Strings
• Styles

Fragments

• Fragment Lifecycle
• Fragment Manager

Supporting User Interface

• ProgressBar
• Dialogs
• Toast & Snackbar

Storage

• Shared Preferences
• DataStore
• File Systems
• Database
  • RoomDB

Build

• Gradle
• Debug / Release Configuration

Threading

• Thread
• Handler/Looper
• ThreadPoolExecutor
• RxJava
• Coroutines/Flow
• WorkManager

Debugging

• Memory Profiling
• Logging
• Systrace
• Exceptions & Error Handling

Memory Leaks

• Detecting and Fixing Memory Leaks
• Context Management

3rd Party Libraries

• Image Loading
  • Glide
  • Picasso
• Dependency Injection
  • Dagger
• Networking
  • Fast Android Networking Library
  • Retrofit
• Multithreading
  • RxJava
  • Coroutines
  • Kotlin Flow API

Coroutines

• Learn here: Master Kotlin Coroutines
• coroutines
• suspend, launch, async-await, withContext
• dispatchers, scope, context, job
• lifecycleScope, viewModelScope, GlobalScope
• suspendCoroutine, suspendCancellableCoroutine
• coroutineScope, supervisorScope

Kotlin Flow API

• Learn here: Kotlin Flow API
• Flow Builder, Operator, Collector
• flowOn, dispatchers
• Operators: filter, map, zip, flatMapConcat, retry, debounce, distinctUntilChanged, flatMapLatest
• Terminal operators
• Cold Flow vs Hot Flow: Cold vs Hot Flow
• StateFlow, SharedFlow, callbackFlow, channelFlow

Data Formats

• JSON
  • GSON
• Flat Buffer
• Protocol Buffer

Networking

• GET/POST/DELETE/PUT/PATCH
• OkHttp, Interceptor
• Caching
• Retrofit with Coroutines/Flow
• Multipart request
• Read, Write Timeout
• OAuth 2.0 - Refresh and Access Token
• HTTP Status Codes

Android Jetpack

• Foundation Components
  • AppCompat
  • Android KTX
  • Multidex
• Architecture Components
  • LiveData
  • ViewModel
  • DataBinding
  • Paging
  • WorkManager
  • Navigation
• Behavior Components
  • Download Manager
  • Media Playback
  • Notifications
  • Permissions
  • Preferences
  • Sharing
  • Slice
• UI Components
  • Animation & Transition
  • Android Auto
  • Emoji
  • Palette
  • Android TV
  • Android Wear

Compose

• State: remember, rememberSaveable, MutableState
• Recomposition, State Hoisting, Side-effects
• Modifier, Theme, Layout, List
• Gestures, Animation
• CompositionLocal

Design Patterns and Architecture

• Builder Pattern
• Singleton
• Dependency Injection
• Factory
• Observer
• Repository
• MVVM, MVP, MVI
• Clean Architecture

Unit Testing

• Local Unit Testing
• Instrumentation Testing

Firebase

• FCM
• Crashlytics
• Analytics
• Remote Config
• App Indexing
• Dynamic Links

Security

• Encrypt / Decrypt
• Proguard, R8

App Release

• .keystore file
• App Bundle
• Playstore

Keep Learning and Improving!