Сборник простых примеров Android.
- GoogleMapsSample - пример работы с картами гугл
- BroadcastreceiverSample - пример работы с сервисом и бродкаст-ресивером
- AndroidAnimationSample - пример анимации View объектов
- SensorSample - пример использовнаия сенсоров устройств
- SimpleXmlSample - пример сериализации в XML при помощи внешней библиотеки
- DialogSample - пример всплывающего сложного диалога
- ProgressSample - пример разных видов прогресс-индикаторов
- IntentSample - пример работы с интентами
- SharedPreferencesSample - пример сохранения данных в SP
- SoundSample - простой пример проигрывания звука
- AnimationCanvasSample - простой пример анимации рисованием на канвасе
Associate Android Developer -требования/примеры:
Testing and debugging
Writing tests to verify that the application's logic and user interface are performing as expected, and executing those tests using the developer tools. Candidates should be able to analyze application crashes, and find common bugs such as layout errors and memory leaks. This includes working with the debuggers to step through application code and verify expected behavior.
Write and execute a local JVM unit test
Write and execute a device UI test
Given a problem description, replicate the failure
Use the system log to output debug information
Debug and fix an application crash (uncaught exception)
Debug and fix an activity lifecycle issue
Debug and fix an issue binding data to views
Application user interface (UI) and user experience (UX)
Implementation of the visual and navigational components of an application's design. This includes constructing layouts—using both XML and Java code—that consist of the standard framework UI elements as well as custom views. Candidates should have a working knowledge of using view styles and theme attributes to apply a consistent look and feel across an entire application. Understanding of how to include features that expand the application's audience through accessibility and localization may also be required.
Mock up the main screens and navigation flow of the application
Describe interactions between UI, background task, and data persistence
Construct a layout using XML or Java code
Create a custom view class and add it to a layout
Implement a custom application theme
Apply a custom style to a group of common widgets
Define a RecyclerView item list
Bind local data to a RecyclerView list
Implement menu-based or drawer navigation
Localize the application's UI text into one other language
Apply content descriptions to views for accessibility
Add accessibility hooks to a custom view
Fundamental application components
Understanding of Android's top-level application components (Activity, Service, Broadcast Receiver, Content Provider) and the lifecycle associated with each one. Candidates should be able to describe the types of application logic that would be best suited for each component, and whether that component is executing in the foreground or in the background. This includes strategies for determining how and when to execute background work.
Describe an application's key functional and nonfunctional requirements
Create an Activity that displays a layout resource
Fetch local data from disk using a Loader on a background thread
Propagate data changes through a Loader to the UI
Schedule a time-sensitive task using alarms
Schedule a background task using JobScheduler
Execute a background task inside of a Service
Implement non-standard task stack navigation (deep links)
Integrate code from an external support library
Persistent data storage
Determining appropriate use cases for local persisted data, and designing solutions to implement data storage using files, preferences, and databases. This includes implementing strategies for bundling static data with applications, caching data from remote sources, and managing user-generated private data. Candidates should also be able to describe platform features that allow applications to store data securely and share that data with other applications in.
Define a database schema; include tables, fields, and indices
Create an application-private database file
Construct database queries returning single results
Construct database queries returning multiple results
Insert new items into a database
Update or delete existing items in a database
Expose a database to other applications via Content Provider
Read and parse raw resources or asset files
Create persistent preference data from user input
Toggle application logic based on preference values
Enhanced system integration
Extending applications to integrate with interfaces outside the core application experience through notifications and app widgets. This includes displaying information to the user through these elements and keeping that information up to date. Candidates should also understand how to provide proper navigation from these external interfaces into the application's main task, including appropriate handling of deep links.
Create an app widget that displays on the device home screen
Implement a task to update the app widget periodically
Create and display a notification to the user