By Godfrey Nolan
Android most sensible Practices through Godfrey Nolan indicates you ways to make your Android apps stand proud of the gang with nice experiences. Why accept simply making any Android app? construct a super Android app in its place that we could your clients compliment it for ease of use, larger functionality, and extra.
Using a sequence of instance apps which steadily evolve all through this book, Android most sensible Practices brings jointly present Android top practices from person interface (UI)/user adventure (UX) layout, test-driven improvement (TDD), and layout styles (e.g., MVC) that will help you take your app to the following level.
In this publication you’ll find out how to:
• Use Android layout styles for constant UI adventure on many devices
• Use agile suggestions similar 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 akin to MVC/MVP
• Create and devour leisure and cleaning soap internet services
Designing and constructing an app that runs good on many if now not the entire top Android smartphones and pills at the present time will be probably the most daunting demanding situations for Android builders. good, this booklet takes a lot of the secret out of that for you.
After interpreting and utilizing Android most sensible Practices, you are going to develop into a higher Android app dressmaker and developer, which in flip could make your apps greater put and extra profitable out there place.
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Extra resources for Android Best Practices
58 CHAPTER 3: Performance 5. Click an object type in the list to see a bar graph that shows the number of objects allocated for a particular memory size in bytes. 6. Click Cause GC again to refresh the data. Details of the heap are given along with a graph of allocation sizes for a particular allocation type. Watch the overall trend in Heap Size to make sure it doesn’t keep growing during the application run. 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.
2. Click the icon again to stop collection after a couple of seconds. 3. The IDE will automatically launch the Traceview window and allow you to analyze the results from right within the IDE. 4. Click a method call in the bottom pane to create a hierarchy, showing you the current method, the parent(s) that call this method, and then the children methods called from within the selected method (Figure 3-10). CHAPTER 3: Performance Figure 3-10. Method Profiling in DDMS using Traceview 5. Identify the methods that are taking the most time so you can look at them closer by creating Traceview files, which we’ll explore later in this section.
Optimized Code In the next few pages you’re going to see how some of these optimizations are used in the ToDo List application. java, which has a bare-bones onCreate() method. Listing 3-2. java, shown in Listing 3-3, has many of the Android and Java optimizations mentioned in this chapter; see comments in the code for more information. It also shows how to stop and start profiling using the Traceview API. 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.