Index

• Basic Knowledge about Android
• Android App Components
• Activity Lifecycle
• Fragment and Fragment Lifecycle
  • Fragment Transition
• Support Multiple Screen
• Difference b/w ANR & Crash
• Threads
• Runnable & Callable
• Handler
• Looper
• Intent
  • Intent v/s PendingIntent v/s Sticky Intent
• Serialization and Deserialization
  • Android JSON Parsing
    • JSON Parsing using GSON
• Parcelable interface & Serializable interface
• Collections
• Difference b/w Abstract class vs Interface
• How APK is build?
• Gradle
• Different Android Version & features
• Different Storage options in Android
• Define ART, AOT, Dalvik and JIT
• Define AAPT
• Services
  • Difference b/w Service and IntentService
  • Foreground Service
• Android Design Patterns
• Android Architecture
  • MVVM Design Pattern
    • Lifecycles
    • ViewModel
    • LiveData
    • Kotlin coroutines
• String:
  • String Pool
  • StringBuffer & StringBuilder
  • String vs StringBuffer vs StringBuilder
• Activity A->B->C->D Problems
• RecyclerView
  • RecyclerView vs ListView
  • Why we use ViewHolder Pattern?
• Difference b/w getContext(), getApplicationContext(), getBaseContext() and “this”
• 9 Patch Images
• Network Libraries:
  • Retrofit Library
  • Volley
• Proguard – Shrink App size
• Deep Linking
• Modern Cryptography
• Compare Image Library
• Difference b/w Service, Thread, IntentService and AsyncTask
• Memory Management
  • Memory Management & OutOfMemoryError
  • Memory leaks
  • Memory Profiler
  • Maximum memory limit of each Process in Android
  • Android setBackgroundResource cause out of memory excepiton
  • Avoid setting largeHeap
• Error:
  • StackOverflow Error
• Broadcasts
• Tasks and Back Stack
• Activity Launch Mode
• Android Lint
• Content Providers
• ConstraintLayout
• MultiDex
• Dependency Injection
  • Dagger 2
• Android Oreo 8.0 Behaviour Changes
• SparseArray & ArrayMap
• Doze Mode and App Standby
• Android Jetpack
  • AndroidX
  • Navigation
  • Data Binding Library
  • Room Persistence Library
  • WorkManager
• Build / Split multiple APKs
• Performance:
  • Rendering
• App startup time

---

Not recommended anymore

• Job Scheduler –> WorkManager
• Sync Adapter –> WorkManager
• RxJava Android –> Kotlin coroutines

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Deprecated:

• AsyncTask Class

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• Intent : Sending simple data to other apps
• OpenGL ES
• WebApp in WebView
• App Shortcuts
• Android device ID
• Install the apk using ADB
• Android Library:
  • Create an Android library
  • Android library through jCenter and Maven Central
  • Publish Android library to server
• SharedPreferences not getting cleared after uninstall or allowBackup
• Ensure that your app supports 64-bit devices
• Random & SecureRandom
• Network security configuration
• Difference b/w Implements vs. Extends
• Which edition of Java is being used in Android – J2ME or Java SE?
• SVG image / VectorDrawables in ImageView
• Android App Bundles
  • Dynamic Delivery
  • Support in-app updates
• Chrome for Android
  • Chrome Custom Tabs
  • Android Intents with Chrome
• Google play Instant App
• Google Play Install Referrer API
• Sensor
• Testing
  • Monkey Test
• Google Play In-App Review API

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• Floating Hint EditText
• Get Dimension of Screen in Pixles
• Back Press Exit the app
• Get Background color of a View
• Floating Activity on top of Another Activity
• Customize DialogFragment
• Customization of ToolBar
• Best way to implement Media Player
• How to convert an Activity to Full screen Activity
• Create a View Programmatically
• Generate SHA1 & Keystore using Terminal
• Create View Slider left or right manually
• Location
  • User Location
  • Get Current Location Latitude – Longitude & address
• Check an application is installed or not
• Fingerprint Authentication
• Screen Lock (Fingerprint, Pattern, Pin or Password)
• Unity Ads
• Camera changes for Android Nougat (24) and above
• Compress image size without losing its quality
• Take ScreenShot programmatically
• Choose Multiple images from Gallery
• Facebook login without Login Button
• Two Android applications with the same user ID (Linux user ID)
• One time login for multiple apps
• Pick an Email from accounts
• Firebase MLKit – Label Images
• File
• SMS:
  • Automatic SMS Verification without SMS permission
  • Send SMS without going to Messaging app
  • Bulk SMS: Sender ID Analysis
• Get a list of installed android applications and pick one to run
• Select Contact number & name from contact list
• PDF Picker
• PdfRenderer API