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?

<p>Top-level class naming (A)</p> 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?

<p>Runtime extension access (D)</p> Signup and view all the answers

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

<p>Implement all abstract methods in Drawable (B)</p> Signup and view all the answers

How is a ShapeDrawable created in Android?

<p>Instantiate a ShapeDrawable object and specify the shape in the constructor (C)</p> Signup and view all the answers

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

<p>getPaint() (B)</p> Signup and view all the answers

Why is animation used in Android applications?

<p>To add motion effects and enhance user interface (D)</p> Signup and view all the answers

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

<p>Property Animation (C)</p> Signup and view all the answers

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

<p>Positions the drawable by setting its boundaries (C)</p> Signup and view all the answers

Why is Property Animation considered a robust framework?

<p>It allows animating any properties of any objects (D)</p> Signup and view all the answers

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

<p>For simple graphics that do not need to change dynamically (C)</p> Signup and view all the answers

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

<p>Canvas allows for efficient regular re-drawing (B)</p> Signup and view all the answers

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

<p>A Drawable does not have user interaction facilities (A)</p> Signup and view all the answers

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

<p>To specify where the Drawable should be drawn and its size (A)</p> Signup and view all the answers

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

<p>Preferred size of the Drawable (B)</p> Signup and view all the answers

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

<p>Information about framing content inside the Drawable (D)</p> Signup and view all the answers

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