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Questions and Answers
Where can you store sounds in an Android app?
The Design Activity has no similarities with the Play Activity.
False
What is the name of the function that draws the board and the cars in the Design Activity?
onDrawingRequested
You can find free sounds in many pages like ______________________.
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What is the purpose of the drawMessage function?
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The view model has a list of levels in the Design Activity.
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What is the name of the function that is called when the car is grabbed?
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In the Design Activity, the list of buttons is stored in the ______________________.
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Match the following sounds with their corresponding functions:
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Study Notes
Android App Development
- The app will have a main activity that shows buttons to choose between the Play Activity and the Design Activity.
- The app will follow a unidirectional data flow and use a view model, and possibly a repository to store levels.
- A repository will be used to store levels, initially as a list, which can be replaced with a database later.
- It's recommended to use packages to group related files, with one package for each activity, one for the repository, and one for common classes.
Initial Preparations
- Create a new project using the "Empty Views Activity" template.
- Change the package name to es.uji.alXXXXXX.freemycar.
- Add the line "maven("https://jitpack.io")" to the settings.gradle.kts file.
- Add the line "id("com.google.devtools.ksp") version "1.9.22-1.0.17" apply false" to the build.gradle.kts file.
- Add the necessary dependencies to the build.gradle.kts file, including VJ1229 Framework, viewModels, Room, and ViewModelScope.
Touch Events
- The TouchProcessor class can be used to ignore clicks on other objects.
- The disableGlobalClick function can be used to disable the effect.
- The removeObject function can be used to eliminate objects from the touch processor.
- The Transformation and TouchProcessor classes can be combined to handle touch events.
Car, Level, and Button Classes
- The Car class will implement the TouchProcessor.Object interface.
- The Car class can have attributes such as boolean values for horizontal/vertical orientation and red car status.
- The Level class is a wrapper for a list of cars, board dimensions, and level number.
- The Level class can have a function to draw a message based on the view model state.
Sound
- The app will have two sounds: one for car movement and one for the red car exiting.
- The sounds can be stored in the res/raw folder.
- The Play Activity will have functions to start, stop, and play victory sounds.
Design Activity
- The Design Activity can be started once the Play Activity is finished.
- The Car, Level, and Button classes can be shared between the two activities.
- The onDrawingRequested function can be used to draw the board, cars, and buttons in the Design Activity.
- The view model will have a list of levels and buttons that can be updated dynamically.
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Description
Learn the fundamentals of Android app development, including the use of interfaces, view models, and unidirectional data flow. This quiz covers the basics of building an Android app with a main activity, repository, and more.
