In this practical and comprehensive guide, author Martin Kleppmann helps you navigate this diverse landscape by examining the pros and cons of various technologies for processing and storing data. Software keeps changing, but the fundamental principles remain the same. With this book, software engineers and architects will learn how to apply those ideas in practice, and how to make full use of data in modern applications.

• Peer under the hood of the systems you already use, and learn how to use and operate them more effectively
• Make informed decisions by identifying the strengths and weaknesses of different tools
• Navigate the trade-offs around consistency, scalability, fault tolerance, and complexity
• Understand the distributed systems research upon which modern databases are built
• Peek behind the scenes of major online services, and learn from their architectures

Highlights of this new Fourth Edition include

• Extensive new coverage: Android 5 (Lollipop), Android Studio, and Material Design; plus Android M early preview
• A laser focus on modern Android essentials, including activities, intents, resources, and background processing
• New Android 5 features for Android TV and Android Wear
• Complete Android Studio projects in nearly every chapter

Learn how to…

• Use the powerful new Android Studio development environment
• Build layouts that automatically display properly on any device
• Craft more dynamic, intuitive apps with Google’s new material design language
• Display the right information at the right time with ListViews and adapters
• Make apps more responsive with background processes
• Add sophisticated navigation with action toolbars and slide-out menus
• Integrate images and media into your apps
• Save data for your app and create public files that can be used by anyone
• Access the cloud to download and parse JSON data
• Use SQLite and content providers to create responsive, data-driven apps
• Create, update, and cancel notifications
• Start developing Android Wearable and TV apps
• Use Google Play Services to add location, mapping, and more
• Package and publish apps to Google Play and other markets

Patterns of Enterprise Application Architecture is written in direct response to the stiff challenges that face enterprise application developers. The author, noted object-oriented designer Martin Fowler, noticed that despite changes in technology--from Smalltalk to CORBA to Java to .NET--the same basic design ideas can be adapted and applied to solve common problems. With the help of an expert group of contributors, Martin distills over forty recurring solutions into patterns. The result is an indispensable handbook of solutions that are applicable to any enterprise application platform.

This book is actually two books in one. The first section is a short tutorial on developing enterprise applications, which you can read from start to finish to understand the scope of the book's lessons. The next section, the bulk of the book, is a detailed reference to the patterns themselves. Each pattern provides usage and implementation information, as well as detailed code examples in Java or C#. The entire book is also richly illustrated with UML diagrams to further explain the concepts.

Armed with this book, you will have the knowledge necessary to make important architectural decisions about building an enterprise application and the proven patterns for use when building them.

The topics covered include

· Dividing an enterprise application into layers

· The major approaches to organizing business logic

· An in-depth treatment of mapping between objects and relational databases

· Using Model-View-Controller to organize a Web presentation

· Handling concurrency for data that spans multiple transactions

· Designing distributed object interfaces

If you have ambitions to build an Android app, this hands-on guide gives you everything you need to dig into the development process and turn your great idea into a reality! In this new edition of Android App Development For Dummies, you'll find easy-to-follow access to the latest programming techniques that take advantage of the new features of the Android operating system. Plus, two programs are provided: a simple program to get you started and an intermediate program that uses more advanced aspects of the Android platform.

Android mobile devices currently account for nearly 80% of mobile phone market share worldwide, making it the best platform to reach the widest possible audience. With the help of this friendly guide, developers of all stripes will quickly find out how to install the tools they need, design a good user interface, grasp the design differences between phone and tablet applications, handle user input, avoid common pitfalls, and turn a "meh" app into one that garners applause.

• Create seriously cool apps for the latest Android smartphones and tablets
• Adapt your existing apps for use on an Android device
• Start working with programs and tools to create Android apps
• Publish your apps to the Google Play Store

Whether you're a new or veteran programmer, Android App Development For Dummies will have you up and running with the ins and outs of the Android platform in no time.

Is your code easy to change? Can you get nearly instantaneous feedback when you do change it? Do you understand it? If the answer to any of these questions is no, you have legacy code, and it is draining time and money away from your development efforts.

In this book, Michael Feathers offers start-to-finish strategies for working more effectively with large, untested legacy code bases. This book draws on material Michael created for his renowned Object Mentor seminars: techniques Michael has used in mentoring to help hundreds of developers, technical managers, and testers bring their legacy systems under control.

The topics covered include

• Understanding the mechanics of software change: adding features, fixing bugs, improving design, optimizing performance
• Getting legacy code into a test harness
• Writing tests that protect you against introducing new problems
• Techniques that can be used with any language or platform—with examples in Java, C++, C, and C#
• Accurately identifying where code changes need to be made
• Coping with legacy systems that aren't object-oriented
• Handling applications that don't seem to have any structure

This book also includes a catalog of twenty-four dependency-breaking techniques that help you work with program elements in isolation and make safer changes.

• Using Eclipse to write apps quickly and efficiently
• Understanding the application lifecycle
• Building robust, friendly user interfaces
• Retrieving, storing, and using data
• Adding network, social, and location-based features
• Supporting the camera and other hardware
• Internationalizing, testing, and publishing apps

Revised and simplified step-by-step instructions with full-color screenshots walk you through key tasks... updated Q and As, Quizzes, and Exercises test your knowledge..."Did You Know?" tips offer insider advice..."Watch Out!" alerts help you avoid problems. By the time you're finished, you won't just understand core Android concepts: you'll be comfortable writing, testing, and publishing your own new apps.

Throughout the book, the authors explain what's important and share their insights into the larger context of the iOS platform. You get a real understanding of how iOS development works, the many features that are available, and when and where to apply what you've learned.

Here are some of the topics covered:

• Xcode 5, Instruments, and Storyboards
• Building interfaces using the iOS 7 aesthetic
• ARC and strong and weak references
• Handling touch events and gestures
• Toolbars, navigation controllers, and split view controllers
• Using Auto Layout to scale user interfaces
• Using Dynamic Type to scale fonts
• Localization and Internationalization
• Block syntax and use
• Saving/loading data: Archiving and Core Data
• Core Location and Map Kit
• Communicating with web services using JSON
• Using the Model-View-Controller-Store design pattern