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Android Custom Drawables Concepts

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Questions and Answers

What is a compound drawable that selects one of a set of drawables based on its state?

Layers

Levels

Scale

States (correct)

How can custom drawable classes be used in XML by specifying the fully-qualified class name?

Using 'image' tag

Using 'custom-drawable' tag

Using 'custom' tag

Using 'drawable' tag (correct)

In custom drawable classes, which method should be overridden to draw content?

onDraw() (correct)

drawContent()

updateDrawable()

onCreate()

Which element naming convention is required when using the fully-qualified class name as the XML element name?

Top-level class naming Signup and view all the answers

What allows the Drawable class to be extended and used at runtime in place of framework-provided drawable classes?

Runtime extension access Signup and view all the answers

What is the minimum requirement for custom drawable classes to be accessible within an application package?

Implement all abstract methods in Drawable Signup and view all the answers

How is a ShapeDrawable created in Android?

Instantiate a ShapeDrawable object and specify the shape in the constructor Signup and view all the answers

What method is used to access the Paint object associated with a ShapeDrawable?

getPaint() Signup and view all the answers

Why is animation used in Android applications?

To add motion effects and enhance user interface Signup and view all the answers

Which animation system is considered the preferred method of animation in Android?

Property Animation Signup and view all the answers

What does the setBounds() method do in relation to ShapeDrawables?

Positions the drawable by setting its boundaries Signup and view all the answers

Why is Property Animation considered a robust framework?

It allows animating any properties of any objects Signup and view all the answers

When is using a View to draw an animation the best option?

For simple graphics that do not need to change dynamically Signup and view all the answers

Why is Canvas a better option than View for redrawing applications regularly?

Canvas allows for efficient regular re-drawing Signup and view all the answers

What is the main difference between a View and a Drawable object?

A Drawable does not have user interaction facilities Signup and view all the answers

Why should the setBounds(Rect) method be called when working with a Drawable?

To specify where the Drawable should be drawn and its size Signup and view all the answers

What information can be obtained using the getIntrinsicHeight() and getIntrinsicWidth() methods of a Drawable?

Preferred size of the Drawable Signup and view all the answers

What does the getPadding(Rect) method of a Drawable provide?

Information about framing content inside the Drawable Signup and view all the answers