Android Devices & Layouts Quiz

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Questions and Answers

What is the recommended default layout for Android?

  • RelativeLayout
  • FrameLayout
  • LinearLayout
  • ConstraintLayout (correct)

Deeply nested layouts improve UI responsiveness.

False (B)

What does dp stand for in the context of Android layouts?

density-independent pixels

Views in Android are measured in ______.

<p>density-independent pixels</p> Signup and view all the answers

Which screen-density bucket is used for high density?

<p>hdpi (D)</p> Signup and view all the answers

What are constraints in ConstraintLayout?

<p>Restrictions or limitations on the properties of a View.</p> Signup and view all the answers

Match the screen-density buckets with their descriptions:

<p>ldpi = Low density (~120dpi) mdpi = Medium density (~160dpi) hdpi = High density (~240dpi) xhdpi = Extra-high density (~320dpi) xxhdpi = Extra-extra-high density (~480dpi) xxxhdpi = Extra-extra-extra-high density (~640dpi)</p> Signup and view all the answers

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Study Notes

  • The recommended default layout for Android is ConstraintLayout.

Deeply Nested Layouts and UI Responsiveness

  • Deeply nested layouts can negatively impact UI responsiveness.

dp in Android Layouts

  • dp stands for "density-independent pixels".
  • "Density-independent pixel" means that the size of the pixel is independent of the screen density.

Android View Measurement Unit

  • Views in Android are measured in pixels (px).

High Density Screen-Density Bucket

  • The screen-density bucket used for high density is "hdpi".

Constraints in ConstraintLayout

  • Constraints in ConstraintLayout are guidelines that define how a view should be positioned and sized.

Screen-Density Bucket Descriptions

  • ldpi (low density): typically used for low-resolution screens.
  • mdpi (medium density): the baseline screen density and the default for most Android devices.
  • hdpi (high density): typically used for high-resolution screens.
  • xhdpi (extra high density): used for very high-resolution screens.
  • xxhdpi (extra extra high density): used for extremely high-resolution screens.
  • xxxhdpi (extra extra extra high density): used for the highest-resolution screens.

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