Deck 6: Managing the Device Orientation

Question 1

The orientation instance variable of the Configuration class represents the ____________ of the device.

Answer 1

orientation

Question 2

Which instance variable of the Configuration class stores the width of the device in dp units?

A) width
B) screenWidth
C) screenWidthDp
D) widthDp

Answer 2

screenWidthDp

Question 3

We set the android:configChanges attribute of the activity element in the AndroidManifest.xml file if we want to get notified of ____________.

Answer 3

orientation changes

Question 4

Assuming the AndroidManifest.xml is correct, the onConfigurationChanged method of the Activity class is automatically called when we rotate the device.

Question 5

It is possible to have one XML file for a horizontal layout and another XML file for a vertical layout.

Question 6

Assume that h is the height of the screen; we want to have x buttons on the screen all equidistant from each other; the height of each button is b. What is the distance between two buttons?

A) b
B) h/x
C) ( h - x * b )/x
D) ( h - x * b )/( x + 1 )

Question 7

The ViewGroup.LayoutParameters class contains a setMargins method that allows us to set all four margins.

Question 8

The XML attribute for the left margin of a GUI component is ____________.

Question 9

It is possible to define the GUI programmatically for both horizontal and vertical orientations.

Question 10

Assume that h is the height of the screen; we want to have 5 buttons on the screen all equidistant from each other; the height of each button is b. What is the distance between two buttons?

A) b
B) h/5
C) ( h - 5 * b )/5
D) ( h - 5 * b )/6

Question 11

The resolveAttribute method of the ____________ class checks whether an attribute is present in a theme.

Question 12

How do we retrieve the data stored in a TypeValue named tv?

A) data
B) tv.data
C) tv.tvData( )
D) tv.type

Question 13

The following instance variable of the Configuration class stores the height of the device in dp units, not including the status bar.

A) height
B) screenHeight
C) screenHeightDp
D) heightDp

Question 14

The parameter of onConfigurationChanged allows us to retrieve the orientation of the device.

Question 15

When we retrieve and modify the ViewGroup.MarginLayoutParams of a View, for example by calling the setMargins method, we actually modify the layout parameters of that View.

Question 16

It is possible to retrieve the height of the action bar programmatically.

Question 17

The constant of the Configuration class whose value is an integer that represents a horizontal orientation is __________________.

Question 18

The getConfiguration method from the Resources class returns a __________________ reference.

Question 19

The getResources method from the Context class returns a __________________ reference.

Question 20

The XML attribute for the right margin of a GUI component is __________________.

Question 21

The XML attribute for the bottom margin of a GUI component is __________________.

Question 22

The getDimensionPixelSize method of the Resources class returns the number of __________________ of a resource given its id.