Deck 9: Fragments

Question 1

Fragments were introduced in API level ____________.

Answer 1

eleven

Question 2

The Fragment class is final and has no subclass.

Answer 2

False

Question 3

The ____________ method is called when a fragment is no longer in use.

Answer 3

onDestroy

Question 4

The ____________ method is called when a fragment is detached from its activity.

Question 5

In an app that includes fragments, we cannot have a Model.

Question 6

What method of the Fragment class returns the Activity that this fragment belongs to?

A) activity
B) fragmentActivity
C) getActivity
D) getFragmentActivity

Question 7

Fragments cannot exchange data.

Question 8

We are coding a class encapsulating an invisible fragment. Thus, we do not code the ____________ method.

Question 9

OnEditorActionListener, a public static inner interface of the TextView class, provides the functionality to handle a(n) ____________ event inside an EditText.

Question 10

We can obtain a(n) ____________ reference by calling the getSystemService of the Context class.

Question 11

In order to get a reference to a fragment using its tag name, we call the ____________ method from the FragmentManager class.

Question 12

It is possible to hide a fragment; that is, the fragment is no longer visible but can be shown later.

Question 13

It is possible to replace a fragment with another.

Question 14

One of the add methods of the FragmentTransaction class has this API:
FragmentTransaction add( int containerViewId, Fragment fragment, String s )
What does s represent?

A) A String to be displayed inside the fragment
B) The tag name of the fragment (so we can retrieve it later using that tag name)
C) The title of the fragment
D) The title of the activity

Question 15

What XML attribute can we use to give Views a size relative to the size of the screen (25%, 50%, etc.)?

A) android:layout
B) android:layout_weight
C) android:weight
D) layout_weight

Question 16

If we want to close a keyboard associated with an EditText when the user hits the key Done, what value should we assign to the attribute android:imeOptions?

A) done
B) actionDone
C) end
D) close

Question 17

What method of the Activity class returns the fragment manager for the activity?

A) Manager
B) getManager
C) getFragmentManager
D) fragmentManager

Question 18

What method of the Fragment class returns the root View for this fragment?

A) view
B) fragmentView
C) getView
D) getFragmentView

Question 19

It is possible to define a fragment programmatically without using a layout XML file.

Question 20

If we call the getActivity method inside a user-defined Fragment class and assign the return value to a user-defined Activity class, the Fragment class is not usable with a different user-defined Activity class. To make it reusable with a different user-defined Activity class, we use an interface inside the user-defined Fragment class and have our user-defined Activity class implement that interface.

Question 21

To get a reference to a fragment using its id, we call the __________________ method from the FragmentManager class.

Question 22

A fragment can be defined in an XML layout file using a __________________ XML element.

Question 23

If we intend to call a method of our Activity class with the Activity of a fragment, it is important to __________________ the return object of the getActivity method to that type of Activity.

Question 24

The __________________ method of the InputMethodManager class can be used to close or hide a keyboard.

Question 25

The IBinder interface encapsulates a(n) __________________ object.

Question 26

We can obtain an ____________ reference by calling the getSystemService of the Context class.