# Titanium.UI.Android.CardView
CardView provides a layout container with rounded corners and a shadow indicating the view is elevated.
# Overview
Android |
---|
Use a CardView to layout content that:
- Comprises multiple data types
- Does not require direct comparison
- Supports variable length content or displays more than three lines of text
- Contains rich content or interactive elements, such as comments or a favorite button
If you are displaying a collection of the same type in a uniform layout without many actions, use a Titanium.UI.ListView or Titanium.UI.TableView instead.
For design guidelines, see Google Design Guidelines: Cards (opens new window)
CardView does not support Titanium.UI.View.backgroundImage, Titanium.UI.View.borderColor, or Titanium.UI.View.backgroundGradient.
# Examples
# Simple Alloy example
<Alloy>
<Window >
<CardView height="100" width="200">
<Label text="CardView example"/>
</CardView>
</Window>
</Alloy>
# CardView used in a ScrollView
The following example creates a CardView used in a ScrollView.
var win = Ti.UI.createWindow({
title: 'Card Demo'
});
var scrollView = Ti.UI.createScrollView({
layout: 'vertical'
});
for (var index = 1; index <= 10; index++) {
var cardView = Ti.UI.Android.createCardView({
layout: 'vertical',
padding: '16dp',
top: '10dp',
left: '10dp',
right: '10dp',
});
cardView.add(Ti.UI.createLabel({
text: 'Card ' + index,
maxLines: 1,
font: {
fontSize: '20dp',
fontWeight: 'bold'
},
width: Ti.UI.FILL
}));
cardView.add(Ti.UI.createLabel({
text: 'This is the card view description text.\nThis is the 2nd line of text.',
textAlign: Ti.UI.TEXT_ALIGNMENT_LEFT,
width: Ti.UI.FILL
}));
scrollView.add(cardView);
}
win.add(scrollView);
win.open();
# Properties
# accessibilityDisableLongPress CREATION ONLY
Boolean value to remove the long press notification for the device's accessibility service.
Will disable the "double tap and hold for long press" message when selecting an item.
Default: true
Whether the view should be "hidden" from (i.e., ignored by) the accessibility service.
On iOS this is a direct analog of the accessibilityElementsHidden
property defined in the
UIAccessibility
Protocol.
On Android, setting accessibilityHidden
calls the native
View.setImportantForAccessibility
method. The native method is only available in Android 4.1 (API level 16/Jelly Bean) and
later; if this property is specified on earlier versions of Android, it is ignored.
Default: false
# accessibilityHint
Briefly describes what performing an action (such as a click) on the view will do.
On iOS this is a direct analog of the accessibilityHint
property defined in the
UIAccessibility Protocol.
On Android, it is concatenated together with
accessibilityLabel and accessibilityValue in the order: accessibilityLabel
,
accessibilityValue
, accessibilityHint
. The concatenated value is then passed as the
argument to the native View.setContentDescription method.
Default: null
# accessibilityLabel
A succint label identifying the view for the device's accessibility service.
On iOS this is a direct analog of the accessibilityLabel
property defined in the
UIAccessibility Protocol.
On Android, it is concatenated together with
accessibilityValue and accessibilityHint in the order: accessibilityLabel
,
accessibilityValue
, accessibilityHint
. The concatenated value is then passed as the
argument to the native View.setContentDescription method.
Defaults to Title or label of the control.
# accessibilityValue
A string describing the value (if any) of the view for the device's accessibility service.
On iOS this is a direct analog of the accessibilityValue
property defined in the
UIAccessibility Protocol.
On Android, it is concatenated together with
accessibilityLabel and accessibilityHint in the order: accessibilityLabel
,
accessibilityValue
, accessibilityHint
. The concatenated value is then passed as the
argument to the native View.setContentDescription method.
Defaults to State or value of the control.
# anchorPoint
Coordinate of the view about which to pivot an animation.
Used on iOS only. For Android, use anchorPoint.
Anchor point is specified as a fraction of the view's size. For example, {0, 0}
is at
the view's top-left corner, {0.5, 0.5}
at its center and {1, 1}
at its bottom-right
corner.
See the "Using an anchorPoint" example in Titanium.UI.Animation for a demonstration. The default is center of this view.
# apiName READONLY
The name of the API that this proxy corresponds to.
The value of this property is the fully qualified name of the API. For example, Titanium.UI.Button
returns Ti.UI.Button
.
# backgroundColor
Background color for CardView as a color name or hex triplet.
For information about color values, see the "Colors" section of Titanium.UI.
# backgroundDisabledColor
Disabled background color of the view, as a color name or hex triplet.
For information about color values, see the "Colors" section of Titanium.UI. Defaults to the normal background color of this view.
# backgroundDisabledImage
Disabled background image for the view, specified as a local file path or URL.
If backgroundDisabledImage
is undefined, and the normal background imagebackgroundImage
is set, the normal image is used when this view is disabled.
# backgroundFocusedColor
Focused background color of the view, as a color name or hex triplet.
For information about color values, see the "Colors" section of Titanium.UI.
For normal views, the focused color is only used if focusable
is true
.
Defaults to the normal background color of this view.
# backgroundFocusedImage
Focused background image for the view, specified as a local file path or URL.
For normal views, the focused background is only used if focusable
is true
.
If backgroundFocusedImage
is undefined, and the normal background image backgroundImage
is set, the normal image is used when this view is focused.
# backgroundSelectedColor
Selected background color of the view, as a color name or hex triplet.
For information about color values, see the "Colors" section of Titanium.UI.
focusable
must be true for normal views.
Defaults to background color of this view.
# backgroundSelectedImage
Selected background image url for the view, specified as a local file path or URL.
For normal views, the selected background is only used if focusable
is true
.
If backgroundSelectedImage
is undefined, and the normal background image backgroundImage
is set
the normal image is used when this view is selected.
# borderRadius
Corner radius for CardView.
Each corner is rounded using an arc of a circle.
Values for each corner can be specified. For example, '20px 20px' will set both left and right corners to 20px
.
Specifying '20px 20px 20px 20px' will set top-left, top-right, bottom-right and bottom-left corners in that order.
If you have issues with dark artifacts on Android you can try to disable Hardware acceleration by setting a
backgroundColor
with a small amount of transparency: backgroundColor:"rgba(255,255,255,254)"
.
Default: 0
# borderWidth
Border width of the view.
If borderColor is set without borderWidth, this value will be changed to 1 of the unit declared as 'ti.ui.defaultunit' in tiapp.xml descriptor.
Default: 0
# bottom
View's bottom position, in platform-specific units.
This position is relative to the view's parent. Exact interpretation depends on the parent view's layout property. Can be either a float value or a dimension string (for example, '50%' or '10px').
This is an input property for specifying where the view should be positioned, and does not represent the view's calculated position.
Defaults to undefined
.
# bubbleParent
Indicates if the proxy will bubble an event to its parent.
Some proxies (most commonly views) have a relationship to other proxies, often established by the add() method. For example, for a button added to a window, a click event on the button would bubble up to the window. Other common parents are table sections to their rows, table views to their sections, and scrollable views to their views. Set this property to false to disable the bubbling to the proxy's parent.
Default: true
# center
View's center position, in the parent view's coordinates.
This is an input property for specifying where the view should be positioned, and does not represent the view's calculated position.
Defaults to undefined
.
# elevation
Elevation for CardView.
The elevation of a view determines the appearance of its shadow. Higher elevations produce larger and softer shadows.
Note: The elevation
property only works on Titanium.UI.View
objects.
Many Android components have a default elevation that cannot be modified.
For more information, see
Google design guidelines: Elevation and shadows.
# filterTouchesWhenObscured
Discards touch related events if another app's system overlay covers the view.
This is a security feature to protect an app from "tapjacking", where a malicious app can use a system overlay to intercept touch events in your app or to trick the end-user to tap on UI in your app intended for the overlay.
Setting this property to true
causes touch related events (including "click") to not be fired
if a system overlay overlaps the view.
Default: false
# focusable
Whether view should be focusable while navigating with the trackball.
Default: false
# height
View height, in platform-specific units.
Defaults to: If undefined, defaults to either FILL or SIZE depending on the view. See "View Types and Default Layout Behavior" in Transitioning to the New UI Layout System.
Can be either a float value or a dimension string (for example, '50%' or '40dp'). Can also be one of the following special values:
- SIZE. The view should size itself to fit its contents.
- FILL. The view should size itself to fill its parent.
- 'auto'. Represents the default sizing behavior for a given type of
view. The use of 'auto' is deprecated, and should be replaced with the
SIZE
orFILL
constants if it is necessary to set the view's behavior explicitly.
This is an input property for specifying the view's height dimension. To determine the view's size once rendered, use the rect or size properties.
Sets the behavior when hiding an object to release or keep the free space
If setting hiddenBehavior
to HIDDEN_BEHAVIOR_GONE it will automatically release the space the view occupied.
For example: in a vertical layout the views below the object will move up when you hide
an object with hiddenBehavior:Titanium.UI.HIDDEN_BEHAVIOR_GONE
.
- HIDDEN_BEHAVIOR_INVISIBLE. Keeps the space and just hides the object (default).
- HIDDEN_BEHAVIOR_GONE. Releases the space and hides the object.
Defaults to Titanium.UI.HIDDEN_BEHAVIOR_INVISIBLE.
# horizontalWrap
Determines whether the layout has wrapping behavior.
For more information, see the discussion of horizontal layout mode in the description of the layout property.
Default: true
# id
View's identifier.
The id
property of the Ti.UI.View represents the view's identifier. The identifier string does
not have to be unique. You can use this property with getViewById method.
# keepScreenOn
Determines whether to keep the device screen on.
When true
the screen will not power down. Note: enabling this feature will use more
power, thereby adversely affecting run time when on battery.
For iOS look at idleTimerDisabled.
Default: false
# layout
Specifies how the view positions its children. One of: 'composite', 'vertical', or 'horizontal'.
There are three layout options:
-
composite
(orabsolute
). Default layout. A child view is positioned based on its positioning properties or "pins" (top
,bottom
,left
,right
andcenter
). If no positioning properties are specified, the child is centered.The child is always sized based on its
width
andheight
properties, if these are specified. If the child's height or width is not specified explicitly, it may be calculated implicitly from the positioning properties. For example, if bothleft
andcenter.x
are specified, they can be used to calculate the width of the child control.Because the size and position properties can conflict, there is a specific precedence order for the layout properties. For vertical positioning, the precedence order is:
height
,top
,center.y
,bottom
.The following table summarizes the various combinations of properties that can be used for vertical positioning, in order from highest precedence to lowest. (For example, if
height
,center.y
andbottom
are all specified, theheight
andcenter.y
values take precedence.)Scenario Behavior height
&top
specifiedChild positioned top
unit from parent's top, using specifiedheight
; anycenter.y
andbottom
values are ignored.height
¢er.y
specifiedChild positioned with center at center.y
, using specifiedheight
; anybottom
value is ignored.height
&bottom
specifiedChild positioned bottom
units from parent's bottom, using specifiedheight
.top
¢er.y
specifiedChild positioned with top edge top
units from parent's top and center atcenter.y
. Height is determined implicitly; anybottom
value is ignored.top
&bottom
specifiedChild positioned with top edge top
units from parent's top and bottom edgebottom
units from parent's bottom. Height is determined implicitly.Only top
specifiedChild positioned top
units from parent's top, and uses the default height calculation for the view type.center.y
andbottom
specifiedChild positioned with center at center.y
and bottom edgebottom
units from parent's bottom. Height is determined implicitly.Only center.y
specifiedChild positioned with center at center.y
, and uses the default height calculation for the view type.Only bottom
specifiedChild positioned with bottom edge bottom
units from parent's bottom, and uses the default height calculation for the view type.height
,top
,center.y
, andbottom
unspecifiedChild entered vertically in the parent and uses the default height calculation for the child view type. Horizontal positioning works like vertical positioning, except that the precedence is
width
,left
,center.x
,right
.For complete details on composite layout rules, see Transitioning to the New UI Layout System in the Titanium Mobile Guides.
-
vertical
. Children are laid out vertically from top to bottom. The first child is laid outtop
units from its parent's bounding box. Each subsequent child is laid out below the previous child. The space between children is equal to the upper child'sbottom
value plus the lower child'stop
value.Each child is positioned horizontally as in the composite layout mode.
-
horizontal
. Horizontal layouts have different behavior depending on whether wrapping is enabled. Wrapping is enabled by default (thehorizontalWrap
property istrue
).With wrapping behavior, the children are laid out horizontally from left to right, in rows. If a child requires more horizontal space than exists in the current row, it is wrapped to a new row. The height of each row is equal to the maximum height of the children in that row.
Wrapping behavior is available on iOS and Android. When the
horizontalWrap
property is set to true, the first row is placed at the top of the parent view, and successive rows are placed below the first row. Each child is positioned vertically within its row somewhat like composite layout mode. In particular:- If neither
top
orbottom
is specified, the child is centered in the row. - If either
top
orbottom
is specified, the child is aligned to either the top or bottom of the row, with the specified amount of padding. - If both
top
andbottom
is specified for a given child, the properties are both treated as padding.
If the
horizontalWrap
property is false, the behavior is more equivalent to a vertical layout. Children are laid or horizontally from left to right in a single row. Theleft
andright
properties are used as padding between the children, and thetop
andbottom
properties are used to position the children vertically.Defaults to Composite layout.
- If neither
# left
View's left position, in platform-specific units.
This position is relative to the view's parent. Exact interpretation depends on the parent view's layout property. Can be either a float value or a dimension string (for example, '50%' or '10px').
This is an input property for specifying where the view should be positioned, and does not represent the view's calculated position.
Defaults to undefined
.
# lifecycleContainer
The Window or TabGroup whose Activity lifecycle should be triggered on the proxy.
If this property is set to a Window or TabGroup, then the corresponding Activity lifecycle event callbacks will also be called on the proxy. Proxies that require the activity lifecycle will need this property set to the appropriate containing Window or TabGroup.
# opacity
Opacity of this view, from 0.0 (transparent) to 1.0 (opaque). Defaults to 1.0 (opaque).
# overrideCurrentAnimation CREATION ONLY
When on, animate call overrides current animation if applicable.
If this property is set to false, the animate call is ignored if the view is currently being animated.
Defaults to undefined
but behaves as false
# paddingBottom
Inner padding between the bottom edge of the Card and children of the CardView.
# paddingLeft
Inner padding between the left edge of the Card and children of the CardView.
# paddingRight
Inner padding between the right edge of the Card and children of the CardView.
# paddingTop
Inner padding between the top edge of the Card and children of the CardView.
# preventCornerOverlap
Add padding to CardView on API level 20 and before to prevent intersections between the Card content and rounded corners.
Default: false
# rect READONLY
The bounding box of the view relative to its parent, in system units.
The view's bounding box is defined by its size and position.
The view's size is rect.width
x rect.height
. The view's top-left position relative to
its parent is (rect.x
, rect.y
).
On Android it will also return rect.absoluteX
and 'rect.absoluteY' which are relative to
the main window.
The correct values will only be available when layout is complete. To determine when layout is complete, add a listener for the postlayout event.
# right
View's right position, in platform-specific units.
This position is relative to the view's parent. Exact interpretation depends on the parent view's layout property. Can be either a float value or a dimension string (for example, '50%' or '10px').
This is an input property for specifying where the view should be positioned, and does not represent the view's calculated position.
Defaults to undefined
.
# rotation
Clockwise 2D rotation of the view in degrees.
Translation values are applied to the static post layout value.
# rotationX
Clockwise rotation of the view in degrees (x-axis).
Translation values are applied to the static post layout value.
# rotationY
Clockwise rotation of the view in degrees (y-axis).
Translation values are applied to the static post layout value.
# scaleX
Scaling of the view in x-axis in pixels.
Translation values are applied to the static post layout value.
# scaleY
Scaling of the view in y-axis in pixels.
Translation values are applied to the static post layout value.
# size READONLY
The size of the view in system units.
Although property returns a Dimension dictionary, only the width
and height
properties are valid. The position properties--x
and y
--are always 0.
To find the position and size of the view, use the rect property instead.
The correct values will only be available when layout is complete. To determine when layout is complete, add a listener for the postlayout event.
# softKeyboardOnFocus
Determines keyboard behavior when this view is focused. Defaults to SOFT_KEYBOARD_DEFAULT_ON_FOCUS.
# tooltip
The default text to display in the control's tooltip.
Assigning a value to this property causes the tool tip to be displayed for the view.
Setting the property to null
cancels the display of the tool tip for the view.
Note: This property is only used for apps targeting macOS Catalyst.
# top
The view's top position.
This position is relative to the view's parent. Exact interpretation depends on the parent view's layout property. Can be either a float value or a dimension string (for example, '50%' or '10px').
This is an input property for specifying where the view should be positioned, and does not represent the view's calculated position.
# touchEnabled
Determines whether view should receive touch events.
If false, will forward the events to peers.
Default: true
# touchFeedback
A material design visual construct that provides an instantaneous visual confirmation of touch point.
Touch feedback is only applied to a view's background. It is never applied to the view's foreground content such as a Titanium.UI.ImageView's image.
For Titanium versions older than 9.1.0, touch feedback only works if you set the backgroundColor property to a non-transparent color.
Default: false
# touchFeedbackColor
Optional touch feedback ripple color. This has no effect unless touchFeedback
is true.
Defaults to provided theme color.
# transform
Transformation matrix to apply to the view.
Android only supports Matrix2D transforms.
Default: Identity matrix
# transitionName
A name to identify this view in activity transition.
Name should be unique in the View hierarchy.
# translationX
Horizontal location of the view relative to its left position in pixels.
Translation values are applied to the static post layout value.
# translationY
Vertical location of the view relative to its top position in pixels.
Translation values are applied to the static post layout value.
# translationZ
Depth of the view relative to its elevation in pixels.
Translation values are applied to the static post layout value.
# useCompatPadding
Add padding on API level 21 and above to have the same measurements with previous versions.
Default: false
# viewShadowColor
Determines the color of the shadow.
iOS Defaults to undefined
. Behaves as if transparent. Android default is black.
On Android you can set <item name="android:ambientShadowAlpha">0.5</item>
and
<item name="android:spotShadowAlpha">0.5</item>
in your theme to change the
opacity.
# width
View's width, in platform-specific units.
Defaults to: If undefined, defaults to either FILL or SIZE depending on the view. See "View Types and Default Layout Behavior" in Transitioning to the New UI Layout System.
Can be either a float value or a dimension string (for example, '50%' or '40dp'). Can also be one of the following special values:
- SIZE. The view should size itself to fit its contents.
- FILL. The view should size itself to fill its parent.
- 'auto'. Represents the default sizing behavior for a given type of
view. The use of 'auto' is deprecated, and should be replaced with the
SIZE
orFILL
constants if it is necessary to set the view's behavior explicitly.
This is an input property for specifying the view's width dimension. To determine the view's size once rendered, use the rect or size properties.
# zIndex
Z-index stack order position, relative to other sibling views.
A view does not have a default z-index value, meaning that it is undefined by default. When this property is explicitly set, regardless of its value, it causes the view to be positioned in front of any sibling that has an undefined z-index.
Defaults to undefined
.
# Methods
# add
Adds a child to this view's hierarchy.
The child view is added as the last child in this view's hierarchy.
Although all views inherit from Titanium.UI.View, not all views are capable of containing other views. In particular:
- Some views are not designed to be containers at all.
- Some views are special-purpose containers that can only contain certain other views.
- Some views are top-level containers that cannot (or should not) be added to other views.
# Non-Container Views
The following views are not intended to act as containers that can hold other views:
- Titanium.UI.ActivityIndicator
- Titanium.UI.Button
- Titanium.UI.ImageView
- Titanium.UI.Label
- Titanium.UI.ProgressBar
- Titanium.UI.SearchBar
- Titanium.UI.Slider
- Titanium.UI.Switch
- Titanium.UI.TableView
- Titanium.UI.TextArea
- Titanium.UI.TextField
- Titanium.UI.WebView
Adding children to the these views may be supported on some platforms, but is not guaranteed to work across platforms. Where it is supported, it may not work as expected.
For maximum portability, these views should be treated as if they do not support children.
Instead of adding children to these views, applications can positon other views as
siblings. For example, instead of adding a button as a child of a WebView
, you can add
the button to the web view's parent such that it appears on top of the web view.
# Special-Purpose Containers
A few view objects act as special-purpose containers--that is, they only manage
certain types of children, and many of them support a special means of adding
these children, instead of the general add
method. These containers include:
-
Titanium.UI.ButtonBar and Titanium.UI.iOS.TabbedBar are designed to hold their own internally-created buttons, assigned by adding strings to the "labels" array. Views added using the
add
method are displayed on top of these buttons. -
Titanium.UI.Picker. Can only hold
PickerRows
andPickerColumns
, which are added using theadd
method. Adding other types of views to aPicker
is not supported. -
Titanium.UI.TableView is a specialized container for
TableViewSection
andTableViewRow
objects. These objects must be added using the properties and methods thatTableView
provides for adding and removing sectons and rows.On some platforms, it is possible to add arbitrary child views to a table view using the
add
method. However, this is not guaranteed to work on all platforms, and in general, should be avoided. -
Titanium.UI.TableViewSection is a specialized container for
TableViewRow
objects, which are added using theadd
method. Theadd
method onTableViewSection
can only be used to addTableViewRow
objects. -
Titanium.UI.iOS.Toolbar is designed to hold buttons and certain other controls, added to its
items
array. Views added using theadd
method are displayed on top of the controls in theitems
array. -
The
Tab
,TabGroup
,NavigationWindow
andSplitWindow
objects are special containers that manage windows. These are discussed in the "Top-Level Containers" section.
# Top-Level Containers
There are certain top-level containers that are not intended to be added as the children of other views. These top-level containers include Titanium.UI.Window, Titanium.UI.iOS.SplitWindow, Titanium.UI.NavigationWindow, and Titanium.UI.TabGroup. Other types of views must be added to a top-level container in order to be displayed on screen.
The special containers Titanium.UI.NavigationWindow,
Titanium.UI.iOS.SplitWindow, Titanium.UI.Tab, and
Titanium.UI.TabGroup manage windows.
These managed windows may be referred to as children of the
container, but they are not added using the add
method.
Tab
is another kind of special container: it is not itself a top-level container,
but can only be used within a TabGroup
. You cannot add
a Tab
to an arbitrary
container.
Parameters
Name | Type | Description |
---|---|---|
view | Titanium.UI.View | Array<Titanium.UI.View> | View to add to this view's hierarchy. You may pass an array of views, e.g. |
Returns
- Type
- void
# addEventListener
Adds the specified callback as an event listener for the named event.
Parameters
Name | Type | Description |
---|---|---|
name | String | Name of the event. |
callback | Callback<Titanium.Event> | Callback function to invoke when the event is fired. |
Returns
- Type
- void
# animate
Animates this view.
The Titanium.UI.Animation object or dictionary passed to this method defines the end state for the animation, the duration of the animation, and other properties.
Note that on SDKs older than 9.1.0 - if you use animate
to move a view, the view's actual position is changed, but
its layout properties, such as top
, left
, center
and so on are not changed--these
reflect the original values set by the user, not the actual position of the view.
As of SDK 9.1.0, the final values of the animation will be set on the view just before the complete
event and/or the callback is fired.
The rect property can be used to determine the actual size and position of the view.
Parameters
Name | Type | Description |
---|---|---|
animation | Titanium.UI.Animation | Dictionary<Titanium.UI.Animation> | Either a dictionary of animation properties or an Titanium.UI.Animation object. |
callback | Callback<Object> | Function to be invoked upon completion of the animation. |
Returns
- Type
- void
# applyProperties
Applies the properties to the proxy.
Properties are supplied as a dictionary. Each key-value pair in the object is applied to the proxy such that myproxy[key] = value.
Parameters
Name | Type | Description |
---|---|---|
props | Dictionary | A dictionary of properties to apply. |
Returns
- Type
- void
# convertPointToView
Translates a point from this view's coordinate system to another view's coordinate system.
Returns null
if either view is not in the view hierarchy.
Keep in mind that views may be removed from the view hierarchy if their window is blurred or if the view is offscreen (such as in some situations with Titanium.UI.ScrollableView).
If this view is a Titanium.UI.ScrollView, the view's x and y offsets are subtracted from the return value.
Parameters
Name | Type | Description |
---|---|---|
point | Point | A point in this view's coordinate system. If this argument is missing an |
destinationView | Titanium.UI.View | View that specifies the destination coordinate system to convert to. If this argument is not a view, an exception will be raised. |
Returns
- Type
- Point
# fireEvent
Fires a synthesized event to any registered listeners.
Parameters
Name | Type | Description |
---|---|---|
name | String | Name of the event. |
event | Dictionary | A dictionary of keys and values to add to the Titanium.Event object sent to the listeners. |
Returns
- Type
- void