By Godfrey Nolan

ISBN-10: 1430258578

ISBN-13: 9781430258575

ISBN-10: 1430258586

ISBN-13: 9781430258582

Android most sensible Practices by means of Godfrey Nolan exhibits you ways to make your Android apps stick out from the gang with nice experiences. Why accept simply making any Android app? construct a super Android app as an alternative that shall we your clients compliment it for ease of use, higher functionality, and extra.

Using a sequence of instance apps which progressively evolve all through this book, Android top Practices brings jointly present Android most sensible practices from consumer interface (UI)/user event (UX) layout, test-driven improvement (TDD), and layout styles (e.g., MVC) that will help you take your app to the subsequent level.

In this e-book you’ll find out how to:

• Use Android layout styles for constant UI adventure on many devices

• Use agile strategies similar to test-driven improvement, behavior-driven improvement, and non-stop integration

• increase the rate and performance of your app

• set up an Android app utilizing layout styles resembling MVC/MVP

• Create and devour leisure and cleaning soap net services

Designing and constructing an app that runs good on many if no longer all of the prime Android smartphones and capsules this day might be the most daunting demanding situations for Android builders. good, this publication takes a lot of the secret out of that for you.

After examining and utilizing Android most sensible Practices, you will develop into an improved Android app clothier and developer, which in flip could make your apps greater put and extra profitable available in the market place.

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Use static/final where appropriate. Because of the way the code is compiled into Davlik bytecode, any code that refers to intVal will use the integer value 42 directly if you use a static final, and accesses to strVal will use a relatively inexpensive “string constant” instruction instead of a field lookup. Use floats judiciously. Floating-point calculation is expensive, usually taking twice as long as integer calculations on Android devices. Make fewer, more productive, NDK calls. Context switching between Java and C++ using the JNI or NDK can be expensive.

Java Performance There are books and books written about Java performance, and Android can also benefit from some well-written Java code. shtml) is a page of links to articles about Java optimization with summaries and reviews of each of these pages of optimization tips. 48 CHAPTER 3: Performance The most common optimizations are as follows: 1. Use + for concatenating two Strings; use Stringbuffer for concatenating more Strings.  Don’t synchronize code unless synchronization is required.  Close all resources, such as connections and session objects, when finished.

Listing 3-3. renderTodos(); // TIP: Again, don't allocate unnecessary objects that expand the heap size to significant proportions (DONE) // Once GC occurs, a large amount of the heap memory is dumped, especially with // local data structures, which renders a large portion of the heap unused. java, shown in Listing 3-4, has examples of some of the remaining optimizations, such as always closing resources and only using SELECT statements to return a minimum of data. Listing 3-4. TABLE_NAME, "title='" + title + "'", null); } // TIP: Don't return the entire table of data.

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Android Best Practices by Godfrey Nolan


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