- [Instructor] To start a favorites,…we are going to use shared preferences.…Go to the Java folder,…right-click on data local,…new Java class.…Call it shared preferences favorites.…Create a private final share preferences field.…It is not initialized yet,…so press Alt+Enter and say…initialize in constructor.…
Accept the default value of null for now.…To initialize it, we will need a context,…so we'll edit as a perimeter…to the constructor in line eight,…context context.…Then, go to the next line and replace null…with context.getSharedPreferences.…We'll give it the file name favorites.xml.…And then, we are going to call the mode…context.MODE_PRIVATE,…meaning that we do not want other apps…to have access to it.…
For favorites we will need three operations.…Get, to retrieve what is previously stored,…put, to stall a new value,…and then we'll have a convenience method toggle,…which retrieves the old value,…flip it from true to false or false to true,…and then put it inside the stall…and then return the value so that we can display it.…
Author
Released
8/30/2017- Why test?
- Local vs. on-device
- Code coverage
- UI testing
- RecyclerView
- Hermetic environment
- Dependency injection
- Testing with MVP
Skill Level Intermediate
Duration
Views
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Android App Development: Data Persistence Libraries
with Annyce Davis4h 52m Intermediate
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Introduction
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Welcome1m
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1. Testing Considerations
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Why test?1m 10s
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Types of tests1m 10s
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Local vs. on-device4m 54s
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2. Test as You Go
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The sample app1m 32s
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Smallest unit first2m 20s
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Code coverage5m 20s
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3. UI Testing
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RecyclerView7m
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RecipeActivity: Layout2m 38s
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Vector drawable: Create3m 7s
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Vector drawable: Use2m 8s
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SharedPreferencesFavorites5m 22s
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Favorite: OnClickListener1m 40s
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4. Hermetic Environment
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Test doubles2m 10s
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Dependency injection1m 3s
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InMemoryFavorites4m 30s
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RecipeApplication3m 18s
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TestRecipeApplication1m 51s
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CustomTestRunner2m 26s
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Test state: Setup2m 17s
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Test state: Test3m 47s
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5. Robot Pattern
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What vs. How56s
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ScreenRobot3m 4s
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RecipeRobot6m 12s
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Clear favorites6m 55s
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Separation of concerns1m 40s
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6. Model-View-Presenter
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Introduction1m 19s
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Refactor: Load recipe2m 58s
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Refactor: Show error6m 1s
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Refactor: Show recipe7m 6s
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Refactor: Toggle favorite3m 31s
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Mockito: Intro1m 18s
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Mockito: Setup4m 29s
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Testing with MVP: Exception2m 26s
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Summary1m 14s
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Conclusion
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Next steps23s
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Video: SharedPreferencesFavorites