Android AND-401 Dumps PDF Free Download - Page: 8

QUESTION: 36

Which of the following is the base class of all UI components?

ListView
Layout
View
ViewGroup

Answer(s): C

Explanation:

View is the base class for android.widget subclasses, which instantiate fully-implemented UI objects. Reference:
http://eagle.phys.utk.edu/guidry/android/androidUserInterface.html

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Which of the following is true about object arrayAdapter declared in the code below?

String[] items = {“Item 1”,”Item 2”,”Item 3”};
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, items);
listView.setAdapter(arrayAdapter);

It creates a TextView for each String in array items.
It creates Buttons for each String in array items.
It creates four views for listView.
It replaces the layout of the activity with three consecutive TextView items.

Answer(s): A

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QUESTION: 38

Which of the following is NOT a correct constructer for ArrayAdapter?

ArrayAdapter(Context context)
ArrayAdapter (Context context, int recourse)
ArayAdpater (Context context , int resource, int textViewResourceId)
ArrayAdapter (Context context , int resource, List<T> items)

Answer(s): A

Explanation:

Public ArrayAdapter Constructors include:
public ArrayAdapter (Context context, int resource)
public ArrayAdapter (Context context, int resource, int textViewResourceId)
public ArrayAdapter (Context context, int resource, List<T> objects)

Reference:

http://developer.android.com/reference/android/widget/ArrayAdapter.html

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QUESTION: 39

Which of the following add a click listener to items in a listView?

onClickListener.
onItemClickListener.
onItemClicked.
onListItemClickListener.

Answer(s): B

Explanation:

AdapterView.OnItemClickListener is an interface definition for a callback to be invoked when an item in this AdapterView has been clicked.

Reference:

http://developer.android.com/reference/android/widget/AdapterView.OnItemClickListener.html

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QUESTION: 40

Which of the following makes a ListView Clickable?

setClickable(true)
setVisibility(View.Visible)
setEnabled(true)
setItemsEnabled(true)

Answer(s): C

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Android Application Development AND-401 Dumps in PDF

Free Android AND-401 Real Questions (page: 8)

QUESTION: 36

Explanation:

QUESTION: 37

QUESTION: 38

Explanation:

Reference:

QUESTION: 39

Explanation:

Reference:

QUESTION: 40