com.actionbarsherlock.view

Interface Menu

All Known Subinterfaces:

ContextMenu, SubMenu

All Known Implementing Classes:

ActionMenu, ContextMenuBuilder, ContextMenuWrapper, MenuBuilder, MenuWrapper, SubMenuBuilder, SubMenuWrapper

public interface Menu

Interface for managing the items in a menu.

By default, every Activity supports an options menu of actions or options. You can add items to this menu and handle clicks on your additions. The easiest way of adding menu items is inflating an XML file into the Menu via MenuInflater. The easiest way of attaching code to clicks is via Activity#onOptionsItemSelected(MenuItem) and Activity#onContextItemSelected(MenuItem).

Different menu types support different features:

1. Context menus: Do not support item shortcuts and item icons.
2. Options menus: The icon menus do not support item check marks and only show the item's condensed title. The expanded menus (only available if six or more menu items are visible, reached via the 'More' item in the icon menu) do not show item icons, and item check marks are discouraged.
3. Sub menus: Do not support item icons, or nested sub menus.

Developer Guides

For more information about creating menus, read the Menus developer guide.

Field Summary

Fields

Modifier and Type	Field and Description
static int	CATEGORY_ALTERNATIVE Category code for the order integer for items/groups that are alternative actions on the data that is currently displayed -- or/add this with your base value.
static int	CATEGORY_CONTAINER Category code for the order integer for items/groups that are part of a container -- or/add this with your base value.
static int	CATEGORY_MASK This is the part of an order integer that supplies the category of the item.
static int	CATEGORY_SECONDARY Category code for the order integer for items/groups that are user-supplied secondary (infrequently used) options -- or/add this with your base value.
static int	CATEGORY_SHIFT Bit shift of the category portion of the order integer.
static int	CATEGORY_SYSTEM Category code for the order integer for items/groups that are provided by the system -- or/add this with your base value.
static int	FIRST First value for group and item identifier integers.
static int	FLAG_ALWAYS_PERFORM_CLOSE Flag for performShortcut(int, KeyEvent, int): if set, always close the menu after executing the shortcut.
static int	FLAG_APPEND_TO_GROUP Flag for addIntentOptions(int, int, int, android.content.ComponentName, android.content.Intent[], android.content.Intent, int, com.actionbarsherlock.view.MenuItem[]): if set, do not automatically remove any existing menu items in the same group.
static int	FLAG_PERFORM_NO_CLOSE Flag for performShortcut(int, android.view.KeyEvent, int): if set, do not close the menu after executing the shortcut.
static int	NONE Value to use for group and item identifier integers when you don't care about them.
static int	USER_MASK This is the part of an order integer that the user can provide.
static int	USER_SHIFT Bit shift of the user portion of the order integer.

Method Summary

Methods

Modifier and Type	Method and Description
MenuItem	add(CharSequence title) Add a new item to the menu.
MenuItem	add(int titleRes) Add a new item to the menu.
MenuItem	add(int groupId, int itemId, int order, CharSequence title) Add a new item to the menu.
MenuItem	add(int groupId, int itemId, int order, int titleRes) Variation on add(int, int, int, CharSequence) that takes a string resource identifier instead of the string itself.
int	addIntentOptions(int groupId, int itemId, int order, android.content.ComponentName caller, android.content.Intent[] specifics, android.content.Intent intent, int flags, MenuItem[] outSpecificItems) Add a group of menu items corresponding to actions that can be performed for a particular Intent.
SubMenu	addSubMenu(CharSequence title) Add a new sub-menu to the menu.
SubMenu	addSubMenu(int titleRes) Add a new sub-menu to the menu.
SubMenu	addSubMenu(int groupId, int itemId, int order, CharSequence title) Add a new sub-menu to the menu.
SubMenu	addSubMenu(int groupId, int itemId, int order, int titleRes) Variation on addSubMenu(int, int, int, CharSequence) that takes a string resource identifier for the title instead of the string itself.
void	clear() Remove all existing items from the menu, leaving it empty as if it had just been created.
void	close() Closes the menu, if open.
MenuItem	findItem(int id) Return the menu item with a particular identifier.
MenuItem	getItem(int index) Gets the menu item at the given index.
boolean	hasVisibleItems() Return whether the menu currently has item items that are visible.
boolean	isShortcutKey(int keyCode, android.view.KeyEvent event) Is a keypress one of the defined shortcut keys for this window.
boolean	performIdentifierAction(int id, int flags) Execute the menu item action associated with the given menu identifier.
boolean	performShortcut(int keyCode, android.view.KeyEvent event, int flags) Execute the menu item action associated with the given shortcut character.
void	removeGroup(int groupId) Remove all items in the given group.
void	removeItem(int id) Remove the item with the given identifier.
void	setGroupCheckable(int group, boolean checkable, boolean exclusive) Control whether a particular group of items can show a check mark.
void	setGroupEnabled(int group, boolean enabled) Enable or disable all menu items that are in the given group.
void	setGroupVisible(int group, boolean visible) Show or hide all menu items that are in the given group.
void	setQwertyMode(boolean isQwerty) Control whether the menu should be running in qwerty mode (alphabetic shortcuts) or 12-key mode (numeric shortcuts).
int	size() Get the number of items in the menu.

Field Detail

USER_MASK

static final int USER_MASK

This is the part of an order integer that the user can provide.

See Also:

Constant Field Values

USER_SHIFT

static final int USER_SHIFT

Bit shift of the user portion of the order integer.

See Also:

Constant Field Values

CATEGORY_MASK

static final int CATEGORY_MASK

This is the part of an order integer that supplies the category of the item.

See Also:

Constant Field Values

CATEGORY_SHIFT

static final int CATEGORY_SHIFT

Bit shift of the category portion of the order integer.

See Also:

Constant Field Values

NONE

static final int NONE

Value to use for group and item identifier integers when you don't care about them.

See Also:

Constant Field Values

FIRST

static final int FIRST

First value for group and item identifier integers.

See Also:

Constant Field Values

CATEGORY_CONTAINER

static final int CATEGORY_CONTAINER

Category code for the order integer for items/groups that are part of a container -- or/add this with your base value.

See Also:

Constant Field Values

CATEGORY_SYSTEM

static final int CATEGORY_SYSTEM

Category code for the order integer for items/groups that are provided by the system -- or/add this with your base value.

See Also:

Constant Field Values

CATEGORY_SECONDARY

static final int CATEGORY_SECONDARY

Category code for the order integer for items/groups that are user-supplied secondary (infrequently used) options -- or/add this with your base value.

See Also:

Constant Field Values

CATEGORY_ALTERNATIVE

static final int CATEGORY_ALTERNATIVE

Category code for the order integer for items/groups that are alternative actions on the data that is currently displayed -- or/add this with your base value.

See Also:

Constant Field Values

FLAG_APPEND_TO_GROUP

static final int FLAG_APPEND_TO_GROUP

Flag for addIntentOptions(int, int, int, android.content.ComponentName, android.content.Intent[], android.content.Intent, int, com.actionbarsherlock.view.MenuItem[]): if set, do not automatically remove any existing menu items in the same group.

See Also:

Constant Field Values

FLAG_PERFORM_NO_CLOSE

static final int FLAG_PERFORM_NO_CLOSE

Flag for performShortcut(int, android.view.KeyEvent, int): if set, do not close the menu after executing the shortcut.

See Also:

Constant Field Values

FLAG_ALWAYS_PERFORM_CLOSE

static final int FLAG_ALWAYS_PERFORM_CLOSE

Flag for performShortcut(int, KeyEvent, int): if set, always close the menu after executing the shortcut. Closing the menu also resets the prepared state.

See Also:

Constant Field Values

Method Detail

add

MenuItem add(CharSequence title)

Add a new item to the menu. This item displays the given title for its label.

Parameters:

title - The text to display for the item.

Returns:

The newly added menu item.

add

MenuItem add(int titleRes)

Add a new item to the menu. This item displays the given title for its label.

Parameters:

titleRes - Resource identifier of title string.

Returns:

The newly added menu item.

add

MenuItem add(int groupId,
           int itemId,
           int order,
           CharSequence title)

Add a new item to the menu. This item displays the given title for its label.

Parameters:

groupId - The group identifier that this item should be part of. This can be used to define groups of items for batch state changes. Normally use NONE if an item should not be in a group.

itemId - Unique item ID. Use NONE if you do not need a unique ID.

order - The order for the item. Use NONE if you do not care about the order. See MenuItem.getOrder().

title - The text to display for the item.

Returns:

The newly added menu item.

add

MenuItem add(int groupId,
           int itemId,
           int order,
           int titleRes)

Variation on add(int, int, int, CharSequence) that takes a string resource identifier instead of the string itself.

Parameters:

groupId - The group identifier that this item should be part of. This can also be used to define groups of items for batch state changes. Normally use NONE if an item should not be in a group.

itemId - Unique item ID. Use NONE if you do not need a unique ID.

order - The order for the item. Use NONE if you do not care about the order. See MenuItem.getOrder().

titleRes - Resource identifier of title string.

Returns:

The newly added menu item.

addSubMenu

SubMenu addSubMenu(CharSequence title)

Add a new sub-menu to the menu. This item displays the given title for its label. To modify other attributes on the submenu's menu item, use SubMenu.getItem().

Parameters:

title - The text to display for the item.

Returns:

The newly added sub-menu

addSubMenu

SubMenu addSubMenu(int titleRes)

Add a new sub-menu to the menu. This item displays the given title for its label. To modify other attributes on the submenu's menu item, use SubMenu.getItem().

Parameters:

titleRes - Resource identifier of title string.

Returns:

The newly added sub-menu

addSubMenu

SubMenu addSubMenu(int groupId,
                 int itemId,
                 int order,
                 CharSequence title)

Add a new sub-menu to the menu. This item displays the given title for its label. To modify other attributes on the submenu's menu item, use SubMenu.getItem().

Note that you can only have one level of sub-menus, i.e. you cannnot add a subMenu to a subMenu: An UnsupportedOperationException will be thrown if you try.

Parameters:

groupId - The group identifier that this item should be part of. This can also be used to define groups of items for batch state changes. Normally use NONE if an item should not be in a group.

itemId - Unique item ID. Use NONE if you do not need a unique ID.

order - The order for the item. Use NONE if you do not care about the order. See MenuItem.getOrder().

title - The text to display for the item.

Returns:

The newly added sub-menu

addSubMenu

SubMenu addSubMenu(int groupId,
                 int itemId,
                 int order,
                 int titleRes)

Variation on addSubMenu(int, int, int, CharSequence) that takes a string resource identifier for the title instead of the string itself.

Parameters:

groupId - The group identifier that this item should be part of. This can also be used to define groups of items for batch state changes. Normally use NONE if an item should not be in a group.

itemId - Unique item ID. Use NONE if you do not need a unique ID.

order - The order for the item. Use NONE if you do not care about the order. See MenuItem.getOrder().

titleRes - Resource identifier of title string.

Returns:

The newly added sub-menu

addIntentOptions

int addIntentOptions(int groupId,
                   int itemId,
                   int order,
                   android.content.ComponentName caller,
                   android.content.Intent[] specifics,
                   android.content.Intent intent,
                   int flags,
                   MenuItem[] outSpecificItems)

Add a group of menu items corresponding to actions that can be performed for a particular Intent. The Intent is most often configured with a null action, the data that the current activity is working with, and includes either the Intent.CATEGORY_ALTERNATIVE or Intent.CATEGORY_SELECTED_ALTERNATIVE to find activities that have said they would like to be included as optional action. You can, however, use any Intent you want.

See PackageManager.queryIntentActivityOptions(android.content.ComponentName, android.content.Intent[], android.content.Intent, int) for more * details on the caller, specifics, and intent arguments. The list returned by that function is used to populate the resulting menu items.

All of the menu items of possible options for the intent will be added with the given group and id. You can use the group to control ordering of the items in relation to other items in the menu. Normally this function will automatically remove any existing items in the menu in the same group and place a divider above and below the added items; this behavior can be modified with the flags parameter. For each of the generated items MenuItem.setIntent(android.content.Intent) is called to associate the appropriate Intent with the item; this means the activity will automatically be started for you without having to do anything else.

Parameters:

groupId - The group identifier that the items should be part of. This can also be used to define groups of items for batch state changes. Normally use NONE if the items should not be in a group.

itemId - Unique item ID. Use NONE if you do not need a unique ID.

order - The order for the items. Use NONE if you do not care about the order. See MenuItem.getOrder().

caller - The current activity component name as defined by queryIntentActivityOptions().

specifics - Specific items to place first as defined by queryIntentActivityOptions().

intent - Intent describing the kinds of items to populate in the list as defined by queryIntentActivityOptions().

flags - Additional options controlling how the items are added.

outSpecificItems - Optional array in which to place the menu items that were generated for each of the specifics that were requested. Entries may be null if no activity was found for that specific action.

Returns:

The number of menu items that were added.

See Also:

FLAG_APPEND_TO_GROUP, MenuItem.setIntent(android.content.Intent), PackageManager.queryIntentActivityOptions(android.content.ComponentName, android.content.Intent[], android.content.Intent, int)

removeItem

void removeItem(int id)

Remove the item with the given identifier.

Parameters:

id - The item to be removed. If there is no item with this identifier, nothing happens.

removeGroup

void removeGroup(int groupId)

Remove all items in the given group.

Parameters:

groupId - The group to be removed. If there are no items in this group, nothing happens.

clear

void clear()

Remove all existing items from the menu, leaving it empty as if it had just been created.

setGroupCheckable

void setGroupCheckable(int group,
                     boolean checkable,
                     boolean exclusive)

Control whether a particular group of items can show a check mark. This is similar to calling MenuItem.setCheckable(boolean) on all of the menu items with the given group identifier, but in addition you can control whether this group contains a mutually-exclusive set items. This should be called after the items of the group have been added to the menu.

Parameters:

group - The group of items to operate on.

checkable - Set to true to allow a check mark, false to disallow. The default is false.

exclusive - If set to true, only one item in this group can be checked at a time; checking an item will automatically uncheck all others in the group. If set to false, each item can be checked independently of the others.

See Also:

MenuItem.setCheckable(boolean), MenuItem.setChecked(boolean)

setGroupVisible

void setGroupVisible(int group,
                   boolean visible)

Show or hide all menu items that are in the given group.

Parameters:

group - The group of items to operate on.

visible - If true the items are visible, else they are hidden.

See Also:

MenuItem.setVisible(boolean)

setGroupEnabled

void setGroupEnabled(int group,
                   boolean enabled)

Enable or disable all menu items that are in the given group.

Parameters:

group - The group of items to operate on.

enabled - If true the items will be enabled, else they will be disabled.

See Also:

MenuItem.setEnabled(boolean)

hasVisibleItems

boolean hasVisibleItems()

Return whether the menu currently has item items that are visible.

Returns:

True if there is one or more item visible, else false.

findItem

MenuItem findItem(int id)

Return the menu item with a particular identifier.

Parameters:

id - The identifier to find.

Returns:

The menu item object, or null if there is no item with this identifier.

size

int size()

Get the number of items in the menu. Note that this will change any times items are added or removed from the menu.

Returns:

The item count.

getItem

MenuItem getItem(int index)

Gets the menu item at the given index.

Parameters:

index - The index of the menu item to return.

Returns:

The menu item.

Throws:

IndexOutOfBoundsException - when index < 0 || >= size()

close

void close()

Closes the menu, if open.

performShortcut

boolean performShortcut(int keyCode,
                      android.view.KeyEvent event,
                      int flags)

Execute the menu item action associated with the given shortcut character.

Parameters:

keyCode - The keycode of the shortcut key.

event - Key event message.

flags - Additional option flags or 0.

Returns:

If the given shortcut exists and is shown, returns true; else returns false.

See Also:

FLAG_PERFORM_NO_CLOSE

isShortcutKey

boolean isShortcutKey(int keyCode,
                    android.view.KeyEvent event)

Is a keypress one of the defined shortcut keys for this window.

Parameters:

keyCode - the key code from KeyEvent to check.

event - the KeyEvent to use to help check.

performIdentifierAction

boolean performIdentifierAction(int id,
                              int flags)

Execute the menu item action associated with the given menu identifier.

Parameters:

id - Identifier associated with the menu item.

flags - Additional option flags or 0.

Returns:

If the given identifier exists and is shown, returns true; else returns false.

See Also:

FLAG_PERFORM_NO_CLOSE

setQwertyMode

void setQwertyMode(boolean isQwerty)

Control whether the menu should be running in qwerty mode (alphabetic shortcuts) or 12-key mode (numeric shortcuts).

Parameters:

isQwerty - If true the menu will use alphabetic shortcuts; else it will use numeric shortcuts.