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Mobile Programming: Multiple Screen Lifecycle and Intent

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Mobile Programming: Multiple Screen Lifecycle and Intent

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Questions and Answers

What is the purpose of using density-independent pixels (dp) when defining UI layout?

To ensure the layout adapts to the actual pixels on the screen.

To optimize the UI for high-density screens.

To express layout dimensions or position in a resolution-independent way. (correct)

To ensure the layout looks the same on all screen sizes and resolutions.

What is the relationship between pixels and density-independent pixels (dp)?

The conversion factor from dp to pixels is 5.

The number of pixels is always equal to the number of dp.

1 dp = 1 pixel on a 160 dpi screen. (correct)

Pixels and dp are interchangeable units in UI design.

What is the significance of using density-independent pixels (dp) in UI design?

Adapts the UI to the physical size of the screen.

Allows direct manipulation of actual pixels on the screen.

Optimizes UI for low-density screens.

Ensures consistent UI across different screen sizes and resolutions. (correct)

How does the usage of scale-independent pixels (sp) differ from that of density-independent pixels (dp)?

sp is recommended for specifying font sizes, while dp is used for layout dimensions and position. Signup and view all the answers

What does the term 'Dots per inch (dpi)' refer to in the context of screen resolution?

The number of pixels per inch of a printed or scanned document. Signup and view all the answers

What is the baseline for density-independent pixels (dp units)?

Medium-density screen Signup and view all the answers

What method can be used to ensure density independence in an application's layout dimensions?

Using wrap_content, fill_parent, or the dp unit Signup and view all the answers

What is the purpose of providing alternative bitmap resources for different densities in Android applications?

To ensure consistent display across different screen densities Signup and view all the answers

What is the major advantage of using a vector drawable in Android applications?

Image scalability Signup and view all the answers

What does 'smallestWidth' refer to in the context of screen size and orientation on Android devices?

The smallest possible width for the screen, indicated by the shortest dimension of the available screen area Signup and view all the answers