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Android Best Practices - download pdf or read online

By Godfrey Nolan

ISBN-10: 1430258578

ISBN-13: 9781430258575

Android top Practices through Godfrey Nolan indicates you the way to make your Android apps stick out from the group with greater reports to your apps. Why accept simply making any Android app? construct an excellent, standout Android app as a substitute that shall we your clients compliment it for ease of use, larger functionality and extra. greater compliment capacity larger, larger placement within the app shops for elevated app revenues.

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Additional info for Android Best Practices

Example text

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. All event logic and delegation is handled by the ViewModel, and the View handles UI setup only. In our example the Model component largely stays the same, as you can see in Listing 2-13. The ViewModel, shown in Listing 2-15 acts as a delegate between the ToDoActivity (View) and the ToDoProvider (Model).

In our example the Model component largely stays the same, as you can see in Listing 2-13. The ViewModel, shown in Listing 2-15 acts as a delegate between the ToDoActivity (View) and the ToDoProvider (Model). The ViewModel receives references from the View and uses them to update the UI. The ViewModel handles rendering and changes to the view’s data and the View, shown in Listing 2-14, simply provides a reference to its elements. The Model Shown in Listing 2-13, the Model largely stays the same in MVVM as it was in the MVC version.

In the following example we’re going to look at using Dagger to mock out a database connection. Often you want to test the app and not the database. 36 CHAPTER 2: Android Patterns There are four pieces in this example that we need to wire together. java contains the injection map that tells the app whether to use the ToDoProvider stub file or the ToDoProvider2 file that connects to the database. java contains a currentChoice Boolean flag that tells the app whether to use the stub or the real connection.

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Android Best Practices by Godfrey Nolan


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