By Godfrey Nolan
Android top Practices through Godfrey Nolan indicates you ways to make your Android apps stand proud of the gang with nice reports. 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, greater functionality, and extra. utilizing a sequence of instance apps which progressively evolve all through this ebook, Android top Practices brings jointly present Android most sensible practices from person 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 following point. during this e-book you will how you can: - Use Android layout styles for constant UI event on many units - Use agile ideas reminiscent of test-driven improvement, behavior-driven improvement, and non-stop integration - increase the rate and performance of your app - arrange an Android app utilizing layout styles akin to MVC/MVP - Create and devour relaxation and cleaning soap internet prone Designing and constructing an app that runs good on many if now not all of the prime Android smartphones and pills this present day could be the most daunting demanding situations for Android builders. good, this booklet takes a lot of the secret out of that for you. After analyzing and utilizing Android most sensible Practices, you are going to turn into a more robust Android app clothier and developer, which in flip could make your apps larger positioned and extra winning out there place. Read more...
summary: Android most sensible Practices via Godfrey Nolan exhibits you the way to make your Android apps stand proud of the gang with nice experiences. Why accept simply making any Android app? construct an excellent Android app as an alternative that we could your clients compliment it for ease of use, larger functionality, and extra. utilizing a chain of instance apps which progressively evolve all through this publication, Android most sensible Practices brings jointly present Android top 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 following point. during this booklet you will find out how to: - Use Android layout styles for constant UI adventure on many units - Use agile ideas comparable to test-driven improvement, behavior-driven improvement, and non-stop integration - enhance the rate and performance of your app - set up an Android app utilizing layout styles comparable to MVC/MVP - Create and eat relaxation and cleaning soap net companies Designing and constructing an app that runs good on many if no longer all of the top Android smartphones and pills this present day will be some of the most daunting demanding situations for Android builders. good, this ebook takes a lot of the secret out of that for you. After examining and utilizing Android most sensible Practices, you are going to develop into a stronger Android app dressmaker and developer, which in flip could make your apps greater put and extra profitable out there position
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CHAPTER 3: Performance 57 DDMS In this section we’ll be covering the System Performance, Heap Usage, Threads, and Traceview tools, all of which come as part of DDMS. We’ll also look at the Memory Analyzer Tool (MAT), which can be downloaded as part of the Eclipse tool and used to report on how memory is being managed in the Heap. System Performance The most basic tool in the DDMS suite is System Performance, which gives a quick snapshot overview of the current CPU load, memory usage, and frame render time, as shown in Figure 3-4.
Figure 3-5. php. MAT can help you make sense of the heap output. Now when you dump the heap profile or hprof file (see Figure 3-6), it will be automatically analyzed so you can make some sense of the heap file. CHAPTER 3: Performance 59 Figure 3-6. Dumping the hprof file MAT provides a number of reports, including a Dominator Tree for the biggest class, a Top Consumers report, and a Leak Suspects report. Figure 3-7 shows Biggest Objects by Retained Size. 60 CHAPTER 3: Performance Figure 3-7. Memory Analyzer Tool overview Memory Allocation The next level of detail about allocations is shown in the Allocation Tracker view (Figure 3-8).
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.