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Questions and Answers
What is the primary purpose of the App Bar in an Android application?
What is the primary purpose of the App Bar in an Android application?
- To manage background tasks.
- To display the content of the current Activity.
- To serve as a consistent top interface across screens. (correct)
- To provide navigation to other apps.
What method is used to override options item selection in Android?
What method is used to override options item selection in Android?
- onOptionsItemSelected() (correct)
- onCreateOptionsMenu()
- onMenuOpened()
- onPrepareOptionsMenu()
Which of the following is NOT a type of menu available in Android development?
Which of the following is NOT a type of menu available in Android development?
- Dialog menu (correct)
- Popup menu
- Options menu
- Contextual action bar
Which element typically provides users with choices for actions relating to the content displayed on the screen?
Which element typically provides users with choices for actions relating to the content displayed on the screen?
Which menu item calls the showSettings() method when selected?
Which menu item calls the showSettings() method when selected?
In which scenario are contextual menus most commonly used?
In which scenario are contextual menus most commonly used?
Which component is specifically mentioned as part of the App Bar's functionality?
Which component is specifically mentioned as part of the App Bar's functionality?
What does the default case in the onOptionsItemSelected() method do?
What does the default case in the onOptionsItemSelected() method do?
What is the purpose of the action overflow button in the app bar?
What is the purpose of the action overflow button in the app bar?
What type of dialog would you use to allow users to select a specific date?
What type of dialog would you use to allow users to select a specific date?
What is a defining feature of contextual menus in Android?
What is a defining feature of contextual menus in Android?
Which of the following is the first step in implementing an options menu?
Which of the following is the first step in implementing an options menu?
Which of the following menus allows for instant actions without occupying much screen space?
Which of the following menus allows for instant actions without occupying much screen space?
What purpose does the action overflow button serve in the App Bar?
What purpose does the action overflow button serve in the App Bar?
Which statement about adding menu item attributes is true?
Which statement about adding menu item attributes is true?
What method must be overridden to inflate the options menu in an Android Activity?
What method must be overridden to inflate the options menu in an Android Activity?
What type of View can contextual menus be deployed on?
What type of View can contextual menus be deployed on?
Which menu type is designed to appear when the user performs a long press on an item?
Which menu type is designed to appear when the user performs a long press on an item?
When adding entries for menu items, which of the following is NOT a typical step?
When adding entries for menu items, which of the following is NOT a typical step?
What happens when the action_favorites menu item is selected?
What happens when the action_favorites menu item is selected?
How can icons be added to menu items in an Android application?
How can icons be added to menu items in an Android application?
Which of the following activities can be accessed through the options menu?
Which of the following activities can be accessed through the options menu?
What does the onOptionsItemSelected() method handle?
What does the onOptionsItemSelected() method handle?
What is the position of the action overflow button in the app bar?
What is the position of the action overflow button in the app bar?
What is the main purpose of the onCreateContextMenu() method?
What is the main purpose of the onCreateContextMenu() method?
Which method allows you to handle selections made in a context menu?
Which method allows you to handle selections made in a context menu?
In the onCreateContextMenu() method, which object is used to inflate the menu layout?
In the onCreateContextMenu() method, which object is used to inflate the menu layout?
What action does the context item with the ID R.id.context_edit perform?
What action does the context item with the ID R.id.context_edit perform?
Which of the following statements about dialogs is NOT true?
Which of the following statements about dialogs is NOT true?
What elements can an AlertDialog include?
What elements can an AlertDialog include?
What is the purpose of calling super.onContextItemSelected(item)?
What is the purpose of calling super.onContextItemSelected(item)?
Which method allows a user to pick a time from a dialog?
Which method allows a user to pick a time from a dialog?
What method is used to create an alert dialog in the provided code?
What method is used to create an alert dialog in the provided code?
Which method allows you to set the action for the positive button in an AlertDialog?
Which method allows you to set the action for the positive button in an AlertDialog?
What does the method alertDialog.setMessage() do in the given example?
What does the method alertDialog.setMessage() do in the given example?
What does the DialogInterface.OnClickListener do in the context of an AlertDialog?
What does the DialogInterface.OnClickListener do in the context of an AlertDialog?
If a developer wants to add a neutral button to the dialog, which method should they use?
If a developer wants to add a neutral button to the dialog, which method should they use?
What is the purpose of setting the title in an AlertDialog?
What is the purpose of setting the title in an AlertDialog?
Which of the following correctly describes the method call 'alertDialog.setNegativeButton()'?
Which of the following correctly describes the method call 'alertDialog.setNegativeButton()'?
In the provided code, which parameter does 'setPositiveButton()' require to function correctly?
In the provided code, which parameter does 'setPositiveButton()' require to function correctly?
What is the primary function of a floating context menu?
What is the primary function of a floating context menu?
Which of the following best describes contextual action mode?
Which of the following best describes contextual action mode?
What is the first step in creating a floating context menu?
What is the first step in creating a floating context menu?
In which method should the context menu be inflated for a View?
In which method should the context menu be inflated for a View?
What is the purpose of the method onContextItemSelected()?
What is the purpose of the method onContextItemSelected()?
Which line of code is necessary to register a TextView for context menus?
Which line of code is necessary to register a TextView for context menus?
What is the main focus of contextual action mode in regards to Views?
What is the main focus of contextual action mode in regards to Views?
After creating an XML menu resource file, which step follows next in building a floating context menu?
After creating an XML menu resource file, which step follows next in building a floating context menu?
Flashcards
onOptionsItemSelected()
onOptionsItemSelected()
A method that is called when the user selects an item from the menu bar.
Contextual Menus
Contextual Menus
A feature in Android that allows users to perform actions on selected views, commonly used in RecyclerView, GridView, or other view collections.
Add menu item attributes
Add menu item attributes
A way to add options to your app's menu bar, allowing users to access various features.
Pickers
Pickers
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Menu bar
Menu bar
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Action overflow button
Action overflow button
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Options menu
Options menu
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Creating a menu resource
Creating a menu resource
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Inflating an options menu
Inflating an options menu
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Handling menu item clicks
Handling menu item clicks
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Setting up menu item clicks
Setting up menu item clicks
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onCreateOptionsMenu()
onCreateOptionsMenu()
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App Bar
App Bar
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Context Menu
Context Menu
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Contextual Action Bar
Contextual Action Bar
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onCreateContextMenu()
onCreateContextMenu()
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Popup Menu
Popup Menu
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Alert Dialog
Alert Dialog
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onContextItemSelected()
onContextItemSelected()
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Date Picker
Date Picker
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Dialog
Dialog
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TimePickerDialog
TimePickerDialog
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DatePickerDialog
DatePickerDialog
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AlertDialog
AlertDialog
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Content area of AlertDialog
Content area of AlertDialog
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AlertDialog.Builder
AlertDialog.Builder
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alertDialog.setTitle()
alertDialog.setTitle()
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alertDialog.setMessage()
alertDialog.setMessage()
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alertDialog.setPositiveButton()
alertDialog.setPositiveButton()
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alertDialog.setNeutralButton()
alertDialog.setNeutralButton()
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alertDialog.setNegativeButton()
alertDialog.setNegativeButton()
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DialogInterface.OnClickListener
DialogInterface.OnClickListener
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Floating Context Menu
Floating Context Menu
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Contextual Action Mode
Contextual Action Mode
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registerForContextMenu()
registerForContextMenu()
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Create XML Menu Resource
Create XML Menu Resource
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Perform Action for Context Menu Items
Perform Action for Context Menu Items
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Study Notes
Android Developer Fundamentals V2 - Menus
- Android menus are used to display options for users in an app
- Types of menus include app bars, context menus, contextual action bars, and popup menus
- Dialogs are another type of user interface element that frequently appears in conjunction with menus
App Bar with Options Menu
- The app bar is a standard element at the top of most Android screens
- It typically includes a navigation icon, activity title, options menu icons, and an overflow button
- This is a common user interface design pattern across Android devices
- The options menu appears when the overflow button is pressed
- Action icons in the app bar show important actions for the app
- The three-dot overflow button opens a full menu of options
Adding Options Menu
- Create an XML menu resource that defines menu items
- (Menu XML example
menu_main.xml
)
- (Menu XML example
- Use
onCreateOptionsMenu()
in the Activity to inflate the menu. - Respond to item clicks with
onOptionsItemSelected()
or appropriate attributes likeandroid:onClick
.
Contextual Menus
- Contextual menus are triggered by actions (e.g., long-press) on specific parts of the screen.
- They provide context-specific actions for a particular view in the app.
- These menus appear on the screen near the user's input (long-press).
Steps for a Contextual Menu
- Create
menu_context.xml
for menu items - Register a view to
onCreateContextMenu
to define which view should show a menu- (Example:
registerForContextMenu(article_text);
)
- (Example:
- In
onCreateContextMenu(...)
:- Get menu inflater from the context
- Inflate menu:
inflater.inflate(R.menu.menu_context, menu);
Dialogs
- Dialogs appear as overlaying windows on top of the main app window.
- Dialogs give users choices or more information
- Dialogs interrupt the app's flow until the user acts.
- Types of dialogs include alert dialogs, date pickers, and time pickers.
Building an AlertDialog
- Use
AlertDialog.Builder
to build dialogs with a title, content, and buttons - Buttons must use
setPositiveButton
,setNegativeButton
, orsetNeutralButton
methods of the builder to implement functionality - In
onClickShowAlert
, create and configure the builder - Create different methods to handle button clicks for appropriate responses
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