Android Tutorial Interview Questions Android is one of the most widely used mobile operating systems in the world. It’s open-source, highly customizable, and backed by a strong development community. Whether you're building your first app or expanding your skills, Android offers powerful tools and a flexible platform for creating modern mobile experiences. A Linux-based, open-source operating system used on smartphones, tablets, smart TVs, wearables, and more. Known for its versatility and global reach powering billions of devices in over 190 countries. Supported by a rich set of development tools, libraries, and frameworks that help streamline app creation from UI design to performance optimization. Before starting this Android tutorial, make sure you understand the topics listed in the links below. This basic knowledge will help you learn Android development more easily. Refer to the following article to learn more about Kotlin , Java , XML | Basics , OOPs Concepts in Android and Android Studio IDE . First Android Application Here is a simple code for creating a simple Android Application to display a text that says "Hello World". We recommend you to edit the code and try to print your own name. Difference between Java and Kotlin Android Fundamentals - Components, Lifecycle and Folder Structure Android Architecture Patterns IDE Setup and Configuration Android Studio is the official Integrated Development Environment (IDE) for Android app development, built on JetBrains IntelliJ IDEA. Let's check some topics to work in the IDE efficiently. Install Java Development Kit (JDK) Install Android Studio Android Studio Main Window Create a New Project Run app on an Emulator Run app on a Physical Device File Structure or Directory Structure of a application is the organization of various files and folders in an Android project, ensuring efficient development and management. Project File Structure res/values folder build.gradle file Resource Raw Folder Components are building blocks of an Android application, each responsible for specific functions. There are 4 main components of Android application mentioned below: Content Providers Broadcast Receiver How Does Android App Work? Activity Lifecycle in Android with Demo App Introduction to Gradle What is Context in Android? Bundle in Android with Example Activity State Changes In Android with Example Processes and Application Lifecycle in Android Desugaring in Android Memory Leaks in Android Deep Linking in Android with Example Easy Runtime Permissions in Android with Dexter Debugging with Stetho Logcat Window in Android Studio Layouts are responsible for defining the structures and arrangements of elements in an Application. It helps to organize views in a hierarchy, allowing for responsive and flexible design. Check on the article Layouts in Android UI Design and some common types are mentioned below. Android UI Layouts ConstraintLayout Components or Views Views are UI components used to display content or handle user interactions, such as buttons, text fields, and images. They are the building blocks of the user interface, allowing developers to design layouts and define app behavior. HorizontalScrollView NestedScrollView Staggered GridView WebView in Android SearchView with Example BottomNavigationView in Android A Button is an UI element that triggers an action when clicked or tapped by the user. There are variety of button types available in Android. Check on the article for Button in Android and also its types. Floating Action Button To learn about extra features refer to the following articles: Theming Floating Action Buttons Ripple Effect in Button Customize shapes and colors of a button Double-Tap on a Button Intent and Intent Filters Intent is a messaging object used to request an action from another component, such as opening an activity, sending data or starting a service, while Intent Filters are the one which specify the types of intents that component can handle. What is Intent in Android? Implicit and Explicit Intents with Examples How to send data from one activity to the second activity Creating multiple Screen app How to open the dialer in Android through Intent? How to open Camera through Intent and display captured image How to send an Email from your Android App? How to make a phone call from your Android App? How to share a captured Image to another App on Android How to send messages on WhatsApp on Android A Toast in Android is a small, pop-up message that appears briefly on the screen to provide feedback to the user. What is Toast and How to use it with Examples How to Change Toast font? How to add a custom-styled Toast in Android RecyclerView is a ViewGroup added to the android studio as a successor of the GridView and ListView. It is flexible and efficient view for displaying large sets of data in a scrollable list. RecyclerView in Android with Example Horizontal RecyclerView with Examples How to create a nested RecyclerView in Android Fragments in Android are reusable UI components that represent a portion of a user interface in an activity. To learn Fully about Fragments check on Introduction to Fragments article and then move on to Lifecycle for it. Fragment Lifecycle in Android How to Create a New Fragment in Android Studio? Adapters in Android are used to bind data to UI components like ListView, GridView, or RecyclerView. It acts as a bridge for converting the data into views that are displayed in the screen. ArrayAdapter in Android SimpleAdapter in Android SimpleExpandableListAdapter in Android Other UI Component Spinner in Android with Example Alert Dialog Box Custom AlertDialog AlertDialog Box Using SweetAlert Dialog Library AlertDialog with Single Item Selection AlertDialog with Multiple Item Selection Change the Position of AlertDialog in Android Switch in Android Image Switcher in Android TextSwitcher in Android Android Notification Notifications in Android with Example Notifications Channel in Android - Oreo (8+) How to Push Notification in Android? Push Notifications in Android Using OneSignal Image Loading Libraries Image Loading Libraries are responsible for simplify the process of loading and displaying the images from the external sources can be Urls or Storage(External). Let us check on some commonly used libraries mentioned below. Top 5 Image Loading Libraries in Android Glide Image Loader Library in Android Apps COIL Image Loader Library in Android Apps Material Design Material Design in Android is a design system that guides the creation of intuitive, visually appealing, and responsive user interfaces. Introduction to Material Design in Android Responsive UI Design in Android Material Buttons Material TextFields Material Date Picker Material Snackbar Material Floating Action Button Material Bottom Navigation Bar Material Navigation Drawer Material Top App Bar Material Bottom Sheet Material Bottom App Bar Material Search Bar Bars in Android refer to UI elements that provide system-level functionality and navigation within an app. Types of Bars in Android Bottom Navigation Bar Charts in Android are visual representations of data, such as bar charts, line graphs, and pie charts, used to display information in a more accessible and engaging way. Group Bar Chart Bar Chart in Android Line Graph View Working with Database Database in Android refers to storing, retrieving, and managing data within an app using different methods. Now, we have different option available while using database, some of the commonly used databases are Firebase, SQLite ,etc. Let us check them one by one. Introduction to Firebase Adding Firebase to Android App User authentication using Firebase in Android Save Data to the Firebase Realtime Database Retrieve Data from the Firebase Realtime Database How to pre-populate database in Android using SQLite Database How to Perform CRUD Operations in Room Database in Android? Android Jetpack Jetpack in Android is a set of libraries, tools, and guidance to help developers follow best practices and reduce boilerplate code. Jetpack Components View Binding with Fragments Jetpack Navigation Component Jetpack Compose - Basics of Jetpack Compose To learn more about Jetpack Compose refer to Jetpack Compose Tutorial Android Architecture Architecture in Android refers to the structured design patterns and best practices used to create maintainable, scalable, and testable Android applications. MVC (Model View Controller) MVP (Model View Presenter) MVVM (Model View ViewModel) Advance Android Let us learn more about advance topics like Storage, Volley, Threading and Multithreading related to Android which needs the prior knowledge about the topics mentioned above. Shared Preferences Internal Storage External Storage How to Save ArrayList to SharedPreferences Preferences DataStore How to Add Views Dynamically and Store Data in Arraylist? JSON and Volley Threading and Multithreading Thread Priority in Kotlin and Android Running User Interface Thread in Android using Kotlin Some Features of Android are more suitable and limited to Kotlin Language. Kotlin Coroutines Dependency Injection with Dagger 2 Network Handling using Retrofit Android Animations Android Gestures Session Management Clone Android Project from GitHub in Android Studio Upload Project on GitHub from Android Studio Publish Your Android App on Google Play Store Request Permissions in Android Application Install and Uninstall Plugins in Android Studio

Android Interview Preparation Android Interview Questions & Answers – (For Beginners) Android Interview Questions & Answers - (For Experienced) Android Projects Practice your Android Knowledge with the projects that includes both beginner and advance level of control over the concepts. Build a simple Calculator app using Android Studio Build a Simple Notes App in Android Build a Bitcoin Tracker Android App Create a Paint Application in Android Create a NFC Reader and Writer Android Application Introduction to Android Development 5 min read History of Android 15+ min read Best Way to Become Android Developer – A Complete Roadmap 7 min read Android Development Prerequisites [2025] - Things to Learn Before Android Development 6 min read Android App Development Fundamentals for Beginners 6 min read Android Architecture 5 min read Android System Architecture 4 min read Android Boot Process 3 min read Difference between Java and Kotlin in Android with Examples 3 min read Interesting Facts About Android 3 min read Download and Install JDK on Windows, Mac and Linux 5 min read Guide to Install and Setup IntelliJ IDEA for Android App Development 5 min read Guide to Install and Setup Visual Studio for Android App Development 4 min read How to Run the Android App on a Real Device? 2 min read Resolving frequently occurring errors in Android Development 3 min read Android Studio Tutorial 9 min read Components of an Android Application 3 min read Introduction to Activities in Android 6 min read Services in Android with Example 8 min read How Does Android App Work? 7 min read Activity Lifecycle in Android with Demo App 9 min read Introduction to Gradle 3 min read What is Context in Android? 7 min read Bundle in Android with Example 6 min read Activity State Changes In Android with Example 6 min read Processes and Application Lifecycle in Android 7 min read Desugaring in Android 4 min read Difference Between AndroidX and Android Support Libraries 3 min read Memory Leaks in Android 7 min read Layouts in Android UI Design 3 min read Android UI Layouts 5 min read LinearLayout and its Important Attributes with Examples in Android 3 min read Android LinearLayout in Kotlin 2 min read Android RelativeLayout in Kotlin 4 min read ConstraintLayout in Android 6 min read TextView widget in Android with Examples 5 min read TextView in Kotlin 3 min read Working With the TextView in Android 7 min read Autosizing TextView in Android 6 min read Button in Android 3 min read How to Add Radio Buttons in an Android Application? 4 min read RadioButton in Kotlin 4 min read How to add Toggle Button in an Android Application 3 min read ToggleButton in Kotlin 2 min read RadioGroup in Kotlin 3 min read What is Intent in Android? 4 min read Implicit and Explicit Intents in Android with Examples 6 min read How to Send Data From One Activity to Second Activity in Android? 7 min read How to open dialer in Android through Intent? 3 min read Creating Multiple Screen Applications in Android 6 min read How to Open Camera Through Intent and Display Captured Image in Android? 6 min read Toasts for Android Studio 2 min read What is Toast and How to Use it in Android with Examples? 6 min read Android Toast in Kotlin 3 min read How to Change Toast font in Android? 3 min read How to add a custom styled Toast in Android 4 min read RecyclerView in Android with Example 7 min read Android | Horizontal RecyclerView with Examples 4 min read How to create a nested RecyclerView in Android 5 min read How to Create RecyclerView with Multiple ViewType in Android? 6 min read RecyclerView using ListView in Android With Example 5 min read Introduction to Fragments | Android 5 min read Fragment Lifecycle in Android 8 min read How to Create a New Fragment in Android Studio? 2 min read How to Create Swipe Navigation in Android? 6 min read ViewPager Using Fragments in Android with Example 6 min read ArrayAdapter in Android with Example 3 min read SimpleAdapter in Android with Example 7 min read SimpleExpandableListAdapter in Android with Example 10 min read AdapterViewFlipper in Android with Example 5 min read BaseExpandableListAdapter in Android with Example 10 min read Spinner in Android with Example 4 min read Spinner in Kotlin 3 min read Dynamic Spinner in Kotlin 3 min read How to add Custom Spinner in Android? 5 min read How to Create an Alert Dialog Box in Android? 4 min read How to Create a Custom AlertDialog in Android? 2 min read Top 5 Image Loading Libraries in Android 6 min read How to Use Picasso Image Loader Library in Android? 7 min read How to Use Glide Image Loader Library in Android Apps? 4 min read Fresco Image Loading Library in Android with Example 3 min read DatePicker in Kotlin 3 min read TimePicker in Kotlin 3 min read How to display Analog clock and Digital clock in Android 2 min read Creating a Calendar View app in Android 2 min read PulseCountDown in Android with Example 2 min read Implement customized TimePicker in Android using SnapTimePicker 3 min read CountDownTimer in Android with Example 3 min read DatePickerDialog in Android 4 min read Introduction to Material Design in Android 5 min read Responsive UI Design in Android 4 min read Material Design EditText in Android with Example 3 min read Theming of Material Design EditText in Android with Example 4 min read Key Properties of Material Design EditText in Android 4 min read How to Use Material Text Input Layout in Android? 3 min read What Are the Different Types of Bars Available in Android? 5 min read ActionBar in Android with Example 8 min read ToolBar in Android with Example 8 min read Difference Between ActionBar and Toolbar in Android 3 min read How to Generate API Key for Using Google Maps in Android? 3 min read How to Add Custom Marker to Google Maps in Android? 5 min read How to Add Multiple Markers on Google Maps in Android? 4 min read How to Use Different Types of Google Maps in Android? 4 min read How to Add SearchView in Google Maps in Android? 4 min read How to Add OnClickListener to Marker on Google Maps in Android? 3 min read How to Draw Polyline in Google Maps in Android? 4 min read How to Calculate Distance Between two Locations in Android? 4 min read How to Draw a Track on Google Maps in Android? 3 min read How to Add Dynamic Markers in Google Maps with Firebase Firstore? 6 min read How to add a Pie Chart into an Android Application 7 min read Point Graph Series in Android 6 min read How to Create Group BarChart in Android? 8 min read How to Create a BarChart in Android? 5 min read Line Graph View in Android with Example 3 min read Animation in Android with Example 7 min read Android Animations using Java 5 min read Android Animations in Kotlin 5 min read How to add fading TextView animation in Android 1 min read How to add Lottie Animation in an Android app 2 min read Firebase - Introduction 7 min read Adding Firebase to Android Application 2 min read How to use Firebase UI Authentication Library in Android? 10 min read User authentication using Firebase in Android 7 min read Firebase Authentication with Phone Number OTP in Android 8 min read How to Use Firebase Firestore as a Realtime Database in Android? 6 min read How to Create Dynamic Auto Image Slider in Android with Firebase? 9 min read How to Create Dynamic WebView in Android with Firebase? 6 min read How to Create Dynamic PDF Viewer in Android with Firebase? 7 min read Shared Preferences in Android with Example 7 min read Internal Storage in Android with Example 5 min read External Storage in Android with Example 8 min read How to Save ArrayList to SharedPreferences in Android? 7 min read Preferences DataStore in Android 4 min read How to Add Views Dynamically and Store Data in Arraylist in Android? 4 min read Volley Library in Android 5 min read JSON Parsing in Android 4 min read JSON Parsing in Android using Volley Library 6 min read Introduction to Android Jetpack 6 min read Foundation Components of Android Jetpack 7 min read Jetpack Architecture Components in Android 10 min read Behaviour Components of Android Jetpack 10 min read UI Components of Android Jetpack 14 min read How to Install Android Studio Canary Version? 4 min read Android Architecture Patterns 5 min read MVC (Model View Controller) Architecture Pattern in Android with Example 7 min read MVP (Model View Presenter) Architecture Pattern in Android with Example 11 min read MVVM (Model View ViewModel) Architecture Pattern in Android 8 min read How to Publish Your Android App on Google Play Store? 5 min read How to Publish Your Android App on Amazon App Store for Free 5 min read Overview of Google Admob 4 min read Android | AdMob Banner Ads for Android Studio 2 min read Android | AdMob Interstitial Ads for Android Studio 2 min read How to Integrate Google Admob Rewarded Video Ads in Android? 7 min read Overview of Facebook Audience Network 4 min read How to Integrate Facebook Audience Network (FAN) Banner Ads in Android? 6 min read How to Integrate Facebook Audience Network (FAN) Native Ads in Android? 10 min read How to Integrate Facebook Audience Network (FAN) Interstitial Ads in Android? 6 min read How to Build a Tic Tac Toe Game in Android? 8 min read How to create a Face Detection Android App using Machine Learning KIT on Firebase 8 min read How to Build a Simple Augmented Reality Android App? 11 min read How to Build a Grocery Android App using MVVM and Room Database? 12 min read Android Projects - From Basic to Advanced Level 7 min read Android Interview Questions and Answers - SDE I to SDE 15+ min read Android Interview Questions and Answers - SDE I to SDE 15+ min read MERN Full Stack Course 2 min read