Godfrey Nolan's Android best practices PDF

By Godfrey Nolan

ISBN-10: 1430258578

ISBN-13: 9781430258575

ISBN-10: 1430258586

ISBN-13: 9781430258582

Android top Practices through Godfrey Nolan indicates you the way to make your Android apps stick out from the gang with nice stories. Why accept simply making any Android app? construct an excellent Android app as an alternative that shall we your clients compliment it for ease of use, larger functionality, and extra. utilizing a sequence of instance apps which steadily evolve all through this publication, Android most sensible Practices brings jointly present Android Read more...

summary: Android most sensible Practices via Godfrey Nolan indicates you ways to make your Android apps stick out from the group with nice studies. 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, larger functionality, and extra. utilizing a chain of instance apps which steadily evolve all through this booklet, Android most sensible Practices brings jointly present Android top practices from person interface (UI)/user event (UX) layout, test-driven improvement (TDD), and layout styles (e.g., MVC) that can assist you take your app to the subsequent point. during this ebook you will : - Use Android layout styles for constant UI event on many units - Use agile concepts corresponding to test-driven improvement, behavior-driven improvement, and non-stop integration - enhance the rate and performance of your app - arrange an Android app utilizing layout styles reminiscent of MVC/MVP - Create and eat leisure and cleaning soap internet prone Designing and constructing an app that runs good on many if now not all of the best Android smartphones and capsules this present day could be probably 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 turn into a far better Android app clothier and developer, which in flip could make your apps higher put and extra profitable out there position

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And while it’s less of an issue on Android, where SQLite is used more for client-side caching of information, there is no reason why EXPLAIN PLAN cannot still be very useful in your performance tuning. And don’t forget you can create indexes on SQLite, too, if you need them (see Figure 3-3). Figure 3-3. InsertHelper command for inserting large amounts of data or use compileStatement where appropriate. Don’t store the database on the SD Card. Finally, don’t return the entire table of data in a SELECT statement; always return the minimum of rows using carefully crafted SQL statements.

To enable it, click the Update Threads icon, shown in Figure 3-9. 61 62 CHAPTER 3: Performance Figure 3-9. DDMS threads The total time spent in a thread running user code (utime) and system code (stime) is measured in what are known as jiffies. A jiffy was originally the time it takes light to travel 1cm, but for Android devices it is the duration of one tick of the system timer interrupt. It varies from device to device but is generally accepted to be about 10ms. The asterisk indicates a daemon thread, and the status Native means the thread is executing native code.

But if the app uses some core algorithm or functionality that doesn’t need to be tied to the UI in any significant way, it should probably be run natively. Running things natively is almost always going to be faster than Java even with the JIT compiler. The NDK also comes with some major security benefits, as it’s much harder to reverse-engineer C++ code. Inflate Views only when needed. Basically, the idea here is that you only inflate the views a minimum number of times or better still delay displaying the view, because inflating views is pretty expensive.

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Android best practices by Godfrey Nolan


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