Learn hands-on how to leverage the latest features of Android to create powerful apps. This book covers best practices; the anatomy, lifecycle, and UI metaphor of Android apps; designing for all mobile platforms, including tablets; and utilizing both the Android framework and Google Play services.

Professional Android

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Android

Preface

WHAT'S IN THIS CHAPTER? A background of mobile application development What is Android? Which devices Android runs on Why you should develop for mobile and Android An introduction to the Android SDK and development framework 

Hello, Android

WHAT'S IN THIS CHAPTER? Installing the Android SDK and Android Studio development environment Creating and debugging your projects Writing Android apps using Kotlin Using the Android Support Library Understanding mobile design considerations The importance of optimizing for speed and efficiency Designing for small screens and mobile data connections Introducing Android Virtual Devices and the Emulator Tips for using Android Studio and improving build performance Understanding app performance using the Android Profiler Introducing Gradle builds and app testing 

Getting Started

WHAT'S IN THIS CHAPTER? Introducing the Android application Understanding the Android application life cycle Recognizing your application’s priority Creating new Activities Understanding an Activity’s state transitions and life cycle Responding to system memory pressure Creating and using Fragments 

Applications and Activities and Fragments, Oh My!

WHAT'S IN THIS CHAPTER? Understanding your application’s manifest Configuring your application’s build files Creating externalized resources Using resources in code and referencing them within other resources Using system-defined resources Using resources to provide dynamic support for internationalization and different device configurations Handling runtime configuration changes 

Defining the Android Manifest and Gradle Build Files, and Externalizing Resources

WHAT'S IN THIS CHAPTER? Density-independent UI Design Using Views and layouts Optimizing layouts Working with Lists and Grids Using the Recycler View and Adapters Implementing Data Binding Extending, grouping, creating, and using Views 

Building User Interfaces

WHAT'S IN THIS CHAPTER? Introducing Intents and Pending Intents Starting Activities and Services using implicit and explicit Intents Returning results from sub-Activities Understanding how Intents are resolved Extending application functionality using Intent Filters Adding links to text fields with Linkify Monitoring device state changes with broadcast Intents Sending broadcast Intents within your application with the Local Broadcast Manager 

Intents and Broadcast Receivers

WHAT'S IN THIS CHAPTER? Connecting to Internet resources Using Asynchronous Tasks to download and process Internet resources on background threads Using View Models and Live Data to store and observe data Parsing XML resources Parsing JSON feeds Using the Download Manager to download files Minimizing battery drain when transferring data 

Using Internet Resources

WHAT'S IN THIS CHAPTER? Persisting application data using Shared Preferences Managing application settings and building Preference Screens Saving Activity instance data between sessions Using View Models and Live Data Including static files as external resources Saving and loading files, and managing the local filesystem Using the application file caches Storing files in public directories Sharing files between applications Accessing files from other applications 

Files, Saving State, and User Preferences

WHAT'S IN THIS CHAPTER? Persisting application data using the Room persistence library Using Room to add, modify, and delete saved data Querying Room databases and observing query result changes using Live Data Creating databases using the SQLite library Using the SQLiteOpenHelper to simplify SQLite database access Validating database input Using Content Values to add, modify, and delete database records Querying database records and managing Cursors Adding, modifying, and deleting data within a Firebase Database Querying and observing changes to a Firebase Database 

Creating and Using Databases

WHAT'S IN THIS CHAPTER? Creating Content Providers Using Content Providers to share application data Restricting shared data access using permissions Querying and performing transactions with databases using Content Providers Using the Content Resolver to query, add, update, and delete data stored in databases Asynchronously querying Content Providers using Cursor Loaders Using the native call log, Media Store, contacts, and calendar Content Providers Adding search capabilities to your applications Providing search suggestions to Search Views 

Content Providers and Search

WHAT'S IN THIS CHAPTER? Using Asynchronous Tasks to execute background tasks Creating background Threads and using Handlers to synchronize with the GUI Thread Scheduling background jobs with the Job Scheduler and Firebase Job Dispatcher Scheduling background work with the Work Manager Displaying Notifications and setting Notification priority Creating Notification actions and responding to user interactions Receiving server-initiated messages with Firebase Cloud Messaging Using Firebase Notifications Using Alarms to schedule application events Creating bound and foreground Services 

Working in the Background

WHAT'S IN THIS CHAPTER? Designing user interfaces optimized for every screen Creating scalable image assets in XML Understanding the principles of material design Using paper and ink as metaphors in your UI designs Guiding user attention through color and keylines Providing continuity through motion Customizing the app bar Displaying grouped content with cards Using the Floating Action Button 

Implementing the Android Design Philosophy

WHAT'S IN THIS CHAPTER? Creating and applying themes to user interfaces Creating Menus and app bar actions Using Action Views and Action Providers Customizing the app bar using Toolbars Implementing advanced scrolling techniques Utilizing tabs, bottom navigation bars, and the navigation drawer for effective navigation Alerting the user with Dialogs, Toasts, and Snackbars 

Implementing a Modern Android User Experience

WHAT'S IN THIS CHAPTER? Making applications accessible Using the text-to-speech and speech recognition libraries Controlling device vibration Going full screen Using property animators Advanced Canvas drawing Handling touch events Advanced Drawable resources Copy, paste, and the clipboard 

Advanced Customization of Your User Interface

WHAT'S IN THIS CHAPTER? Installing and using Google Play services Determining and updating the device’s physical location Using the emulator to test location-based functionality Setting and monitoring Geofences Finding addresses and address locations with the Geocoder Adding interactive maps to your application Changing the map camera position Displaying user location on a map Adding markers, shapes, and image overlays to maps Adding awareness of the user’s context using awareness snapshots Setting and monitoring contextual awareness fences 

Location, Contextual Awareness, and Mapping

WHAT'S IN THIS CHAPTER? Using the Sensor Manager Introducing the different types of sensors Discovering available sensors and their capabilities Finding and using dynamic sensors Learning best practices for using sensors Testing sensors using the Emulator Finding a device’s natural orientation Remapping a device’s orientation reference frame Monitoring sensors and interpreting sensor values Using sensors to monitor a device’s movement and orientation Using sensors to monitor a device’s environment Using sensors to monitor a user’s vital signs User activity tracking using Activity Recognition 

Hardware Sensors

WHAT'S IN THIS CHAPTER? Playing audio and video with the Media Player and Exoplayer Handling audio focus Working with a Media Session Building Media Controls Background audio playback Using the Media Router and Cast Application Framwork Creating Media Style Notifications Recording audio Recording video and taking pictures using Intents Previewing recorded video and displaying live camera streams Taking pictures and controlling the camera directly Adding recorded media the Media Store 

Audio, Video, and Using the Camera

WHAT'S IN THIS CHAPTER? Managing the local Bluetooth adapter Discovering Bluetooth client devices Transferring data using Bluetooth and Bluetooth LE Discovering Wi-Fi Direct Peer-to-Peer devices Transferring data using Wi-Fi Peer-to-Peer Scanning NFC tags Transferring data using Android Beam 

Communicating with Bluetooth, NFC, and Wi-Fi Peer-to-Peer

WHAT'S IN THIS CHAPTER? Creating and updating home screen Widgets Creating and updating collection-based home screen Widgets Creating Live Wallpaper Creating static and dynamic App Shortcuts Updating and removing dynamic App Shortcuts 

Invading the Home Screen

WHAT'S IN THIS CHAPTER? Securing Android using permissions Authenticating with the fingerprint sensor Ensuring backward and forward hardware and software compatibility Improving application performance using Strict Mode Initiating phone calls and creating a new phone dialer Monitoring phone state and incoming calls Using Intents to send SMS and MMS messages Using the SMS Manager to send SMS messages Handling incoming SMS messages 

Advanced Android Development

WHAT'S IN THIS CHAPTER? Preparing your application for release Creating a signing certificate and signing your release builds Managing your release certificates with Google Play Creating a Google Play Store listing Publishing on the Google Play Store Using Alpha, Beta, and staged rollout releases Using Google Play to monitor application metrics, app vitals, user acquisition, and user feedback Understanding monetization and promotion strategies Optimizing your app using Firebase Analytics and Firebase Performance Monitoring 

Releasing, Distributing, and Monitoring Applications

A AAPT (Android Asset Packaging Tool), 49 AccelerateDecelerateInterpolator, 512 acceleration changes, 640–642 GForceMeter, 642–645 linear, 639 x-axis, 640 y-axis, 641 z-axis, 641 

Professional Android

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Ian Lake

Reto Meier

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Professional Android