Download PDF by Godfrey Nolan: Android Best Practices

By Godfrey Nolan

ISBN-10: 1430258578

ISBN-13: 9781430258575

Android most sensible Practices by means of Godfrey Nolan indicates you ways to make your Android apps stand proud of the gang with more suitable reports to your apps. Why accept simply making any Android app? construct a super, standout Android app as a substitute that shall we your clients compliment it for ease of use, larger functionality and extra. larger compliment ability greater, larger placement within the app shops for elevated app revenues.

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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. 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.

AddEntry(data); } //Overrides to handle View specifics and keep Model straightforward. close(); } return tasks; } } 29 30 CHAPTER 2: Android Patterns MVVM The MVVM (Model-View-ViewModel) pattern comes from the Microsoft world. Net, it might also be applicable to Android. The difference between MVC and MVVM is that the Model should contain no logic specific to the view—only logic necessary to provide a minimal API to the ViewModel. The Model only needs to add/delete, and the ViewModel handles the specific needs of the View.

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. ” We’re right back to the web site optimization techniques I mentioned earlier. Use the server logs, as shown in Figure 3-2 earlier, to see how long each call is taking and optimize the slowest, most-used Web services.

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Android Best Practices by Godfrey Nolan

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