Associate Android Developer Certification Questions and Answer (Dumps and Practice Questions)
Question : What is the parent class of all Activity widgets?
1. ViewGroup
2. Layout
3. View
4. Widget
Correct Answer : 3
Explanation: This class represents the basic building block for user interface components. A View occupies a rectangular area on the screen and is responsible for drawing and event handling. View is the base class for widgets, which are used to create interactive UI components (buttons, text fields, etc.). The ViewGroup subclass is the base class for layouts, which are invisible containers that hold other Views (or other ViewGroups) and define their layout properties.
All of the views in a window are arranged in a single tree. You can add views either from code or by specifying a tree of views in one or more XML layout files. There are many specialized subclasses of views that act as controls or are capable of displaying text, images, or other content.
Once you have created a tree of views, there are typically a few types of common operations you may wish to perform:
Set properties: for example setting the text of a TextView. The available properties and the methods that set them will vary among the different subclasses of views. Note that properties that are known at build time can be set in the XML layout files.
Set focus: The framework will handled moving focus in response to user input. To force focus to a specific view, call requestFocus().
Set up listeners: Views allow clients to set listeners that will be notified when something interesting happens to the view. For example, all views will let you set a listener to be notified when the view gains or loses focus. You can register such a listener using setOnFocusChangeListener(android.view.View.OnFocusChangeListener). Other view subclasses offer more specialized listeners. For example, a Button exposes a listener to notify clients when the button is clicked.
Set visibility: You can hide or show views using setVisibility(int).
Note: The Android framework is responsible for measuring, laying out and drawing views. You should not call methods that perform these actions on views yourself unless you are actually implementing a ViewGroup.
Question : What is the name of the class used by Intent to store additional information?
1. Extra
2. Parcelable
3. Bundle
4. DataStore
Correct Answer : 3
Explanation: in Android, the Intent describes the activity to be executed. An Intent contains certain header, action and type, but also can contain data.
The data of the Intent is described as a Bundle. The Bundle object is used to pass data between activities. This data can be retrieved from the Intent through the getExtras() method. A Bundle object is actually a hash control that stores key and value pairs.
Question : Which is not included in the Android application framework?
1. WindowManager
2. NotificationManager
3. DialerManager
4. PackageManager
Correct Answer : 3
Explanation: The interface that apps use to talk to the window manager.
Use Context.getSystemService(Context.WINDOW_SERVICE) to get one of these.
Each window manager instance is bound to a particular Display. To obtain a WindowManager for a different display, use createDisplayContext(Display) to obtain a Context for that display, then use Context.getSystemService(Context.WINDOW_SERVICE) to get the WindowManager.
The simplest way to show a window on another display is to create a Presentation. The presentation will automatically obtain a WindowManager and Context for that display.
Notifications can take different forms:
A persistent icon that goes in the status bar and is accessible through the launcher, (when the user selects it, a designated Intent can be launched),
Turning on or flashing LEDs on the device, or
Alerting the user by flashing the backlight, playing a sound, or vibrating.
Each of the notify methods takes an int id parameter and optionally a String tag parameter, which may be null. These parameters are used to form a pair (tag, id), or (null, id) if tag is unspecified. This pair identifies this notification from your app to the system, so that pair should be unique within your app. If you call one of the notify methods with a (tag, id) pair that is currently active and a new set of notification parameters, it will be updated. For example, if you pass a new status bar icon, the old icon in the status bar will be replaced with the new one. This is also the same tag and id you pass to the cancel(int) or cancel(String, int) method to clear this notification.
PackageManager: Class for retrieving various kinds of information related to the application packages that are currently installed on the device. You can find this class through getPackageManager().
Related Questions
Question : Which of the following WebView methods allows you to manually load custom HTML markup?
1. loadData
2. loadHTML
3. loadCustomData
4. loadCustomHTML
Question : Which of the following is the base class of all UI components?
1. ListView
2. Layout
3. View
4. ViewGroup
Question : Which of the following is true about object arrayAdapter declared in the code below?
String[] items = {"Item 1","Item 2","Item 3"};
ArrayAdapter
listView.setAdapter(arrayAdapter);
1. It creates a TextView for each String in array items.
2. It creates Buttons for each String in array items.
3. It creates four views for listView.
4. It replaces the layout of the activity with three consecutive TextView items
Question : Which of the following is NOT a correct constructer for ArrayAdapter?
1. ArrayAdapter(Context context)
2. ArrayAdapter (Context context, int recourse)
3. ArayAdpater (Context context , int resource, int textViewResourceId)
4. ArrayAdapter (Context context , int resource, List
Question : Which of the following add a click listener to items in a listView?
1. onClickListener.
2. onItemClickListener.
3. onItemClicked.
4. onListItemClickListener
Question : Which of the following makes a ListView Clickable?
1. setClickable(true)
2. setVisibility(View.Visible)
3. setEnabled(true)
4. setItemsEnabled(true)