Deck 7: Reveal Displaying Pictures in a Gridview

Question 1

Which of the following is NOT an attribute of a GridView control?

A) leftMargin
B) numColumns
C) columnWidth
D) verticalSpacing

Answer 1

A

Question 2

What type of control is usually used to select a wallpaper image for the Android device background?

A) GridView
B) ImageViewer
C) MediaPlayer
D) TextView

Answer 2

A

Question 3

To meet the goal of providing a clean, professional effect with images in an application, Android provides a layout tool called ScrollView.

Answer 3

False

Question 4

A grid of images is not very useful for selecting wallpaper because of the large number of options.

Question 5

Using controls such as the GridView and Spinner, what binds specific types of data and displays that data in a particular layout?

A) adapter
B) context
C) editor
D) view

Question 6

What is typically used to assign values to a GridView control that has multiple items?

A) array
B) boolean
C) integer
D) String

Question 7

What should you use to declare a variable that cannot be changed?

A) local
B) final
C) temp
D) static

Question 8

Any method that is not declared void must contain a return statement with a corresponding return value.

Question 9

When you add a new class that extends a base class, the method stubs that need implementation are auto-generated.

Question 10

The GridView control, while very useful for displaying images, cannot be customized.

Question 11

What is the first GridView control in a project named by default?

A) control1
B) defaultGallery
C) gridView1
D) theGallery

Question 12

Which of the following variable types can be accessed from multiple methods throughout an application?

A) Static
B) Class-level
C) Local-level
D) Temporary

Question 13

If you wish, you can scale grid images to the full size of the screen.

Question 14

What is used to identify each element in an array?

A) counter
B) index
C) position
D) reference

Question 15

The position argument in the OnItemClick method is a numeric value that holds which quadrant of the screen an item can be found.

Question 16

Which of the following terms defines a rectangular area of the screen that displays an image or text object.

A) Expanse container
B) Layout container
C) Space container
D) View container

Question 17

The GridView control is the only control that monitors for tap or click events.

Question 18

A View represents a piece of the screen area that displays an object.

Question 19

The length of an array is one more than the maximum subscript number.

Question 20

What category of the Palette does the control GridView sit in?

A) Images category
B) Composite category
C) Media category
D) Viewing category

Question 21

Which method provides a number of arguments to its registered listeners?

A) tapped method
B) clicked method
C) onTap method
D) onItemClick method

Question 22

The code to reference an image called panda . P n g is ____________________.

Question 23

Which is a common aspect ratio?

A) 4:3
B) 3:4
C) 16:8
D) 10:6

Question 24

Where do you specify a method's return type?

A) in its body
B) in its declaration
C) in its last line
D) in its name

Question 25

When the ImageAdapter class is called, which method determines how many pictures should be displayed in the GridView control?

A) count() method
B) getCount() method
C) getNumber() method
D) getSize() method

Question 26

Which of the following terms best describes the fractional relation of the width of an image compared with its height?

A) aspect ratio
B) framing ratio
C) scaling ratio
D) x-to-y ratio

Question 27

Which attribute in XML code can be used to place an image on the surface of a Button control?

A) a ndroid:image
B) image:src
C) image:path
D) android:src

Question 28

Which of the following is the scaling option that scales an image to fit the View type?

A) ImageView.ScaleType. CENTER
B) ImageView.ScaleType. CENTER_CROP
C) ImageView.ScaleType. FIT_SIZE
D) ImageView.ScaleType. FIT_XY

Question 29

Which of the following variables is used to load and access resources for the application?

A) App variable
B) Context variable
C) Program variable
D) System variable

Question 30

The method to set an image to an ImageView control is ____________________.

Question 31

What is used to initialize the instance variables of an object?

A) reference
B) class
C) constructor
D) method

Question 32

In Android programs, you can place the ____________________ method in another method that is triggered only when the user touches the GridView control.

Question 33

What is the return type of a method that returns nothing?

A) double
B) int
C) null
D) void

Question 34

Which argument of the onItemClick method determines the row of the selected item?

A) id
B) view
C) position
D) parent

Question 35

Which statement do you place at the end of a method if the method sends a value to the statement that called it?

A) public
B) default
C) return
D) case

Question 36

Which argument of the onItemClick method holds the value of the array element in the View adapter?

A) parent
B) view
C) position
D) id

Question 37

Which of the following is true about toast notifications?

A) They never receive focus
B) They are of fixed duration
C) They are limited to twenty characters
D) They message cannot contain a variable

Question 38

The ____________________ method provides the data model for the GridView layout.

Question 39

Which scaling option does not scale or change the aspect ratio of an image?

A) ImageView.ScaleType. CENTER
B) ImageView.ScaleType. CENTER_CROP
C) ImageView.ScaleType. FIT_SIZE
D) ImageView.ScaleType. FIT_XY

Question 40

Using a(n) __________________ control, users can quickly scroll through a listing of thumbnail-sized pictures.

Question 41

A(n) ____________ container can include layouts such as GridView, RadioGroup, and ListView.

Question 42

The ______________________ ScaleType option centers the image within the View type and scales it uniformly.

Question 43

The code to resize an image variable pic to 275x200 is ____________________.

Question 44

A(n) ____________________ is a series of statements that perform some repeated task.

Question 45

The most powerful method in the ImageAdapter class is the ____________________ method.

Question 46

The code to find the size of an array called fruit is ____________________.

Question 47

________________ can change the displayed size of an image and keeps or changes the aspect ratio of the image within the ImageView control.

Question 48

To use a toast message within an onItemClick method, you must replace MainActivity.this with a Context class called _________________.

Question 49

The method to scale an ImageView a certain way is ____________________.

Question 50

A(n) ____________________ is used to initialize the instance variables of an object.