public
class
AnimatedVectorDrawable
extends Drawable
implements
Animatable2
java.lang.Object | ||
↳ | android.graphics.drawable.Drawable | |
↳ | android.graphics.drawable.AnimatedVectorDrawable |
This class uses ObjectAnimator
and
AnimatorSet
to animate the properties of a
VectorDrawable
to create an animated drawable.
AnimatedVectorDrawable are normally defined as 3 separate XML files.
First is the XML file for VectorDrawable
.
Note that we allow the animation to happen on the group's attributes and path's
attributes, which requires they are uniquely named in this XML file. Groups
and paths without animations do not need names.
<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="64dp" android:width="64dp" android:viewportHeight="600" android:viewportWidth="600" > <group android:name="rotationGroup" android:pivotX="300.0" android:pivotY="300.0" android:rotation="45.0" > <path android:name="v" android:fillColor="#000000" android:pathData="M300,70 l 0,-70 70,70 0,0 -70,70z" /> </group> </vector>
Second is the AnimatedVectorDrawable's XML file, which defines the target VectorDrawable, the target paths and groups to animate, the properties of the path and group to animate and the animations defined as the ObjectAnimators or AnimatorSets.
<animated-vector xmlns:android="http://schemas.android.com/apk/res/android" android:drawable="@drawable/vectordrawable" > <target android:name="rotationGroup" android:animation="@anim/rotation" /> <target android:name="v" android:animation="@anim/path_morph" /> </animated-vector>
Last is the Animator XML file, which is the same as a normal ObjectAnimator or AnimatorSet. To complete this example, here are the 2 animator files used in avd.xml: rotation.xml and path_morph.xml.
<objectAnimator android:duration="6000" android:propertyName="rotation" android:valueFrom="0" android:valueTo="360" />
<set xmlns:android="http://schemas.android.com/apk/res/android"> <objectAnimator android:duration="3000" android:propertyName="pathData" android:valueFrom="M300,70 l 0,-70 70,70 0,0 -70,70z" android:valueTo="M300,70 l 0,-70 70,0 0,140 -70,0 z" android:valueType="pathType"/> </set>
XML attributes | |
---|---|
android:animation |
The animation for the target path, group or vector drawable
Must be a reference to another resource, in the form " |
android:drawable |
The static vector drawable. |
android:name |
The name of the target path, group or vector drawable
Must be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character. |
Public constructors | |
---|---|
AnimatedVectorDrawable()
|
Public methods | |
---|---|
void
|
applyTheme(Resources.Theme t)
Applies the specified theme to this Drawable and its children. |
boolean
|
canApplyTheme()
|
void
|
clearAnimationCallbacks()
Removes all existing animation callbacks. |
void
|
draw(Canvas canvas)
Draw in its bounds (set via setBounds) respecting optional effects such as alpha (set via setAlpha) and color filter (set via setColorFilter). |
int
|
getAlpha()
AnimatedVectorDrawable is running on render thread now. |
int
|
getChangingConfigurations()
Return a mask of the configuration parameters for which this drawable may change, requiring that it be re-created. |
ColorFilter
|
getColorFilter()
Returns the current color filter, or |
Drawable.ConstantState
|
getConstantState()
Return a |
int
|
getIntrinsicHeight()
Returns the drawable's intrinsic height. |
int
|
getIntrinsicWidth()
Returns the drawable's intrinsic width. |
int
|
getOpacity()
Return the opacity/transparency of this Drawable. |
void
|
getOutline(Outline outline)
Called to get the drawable to populate the Outline that defines its drawing area. |
void
|
inflate(Resources res, XmlPullParser parser, AttributeSet attrs, Resources.Theme theme)
Inflate this Drawable from an XML resource optionally styled by a theme. |
boolean
|
isRunning()
Indicates whether the animation is running. |
boolean
|
isStateful()
Indicates whether this drawable will change its appearance based on state. |
Drawable
|
mutate()
Make this drawable mutable. |
boolean
|
onLayoutDirectionChanged(int layoutDirection)
Called when the drawable's resolved layout direction changes. |
void
|
registerAnimationCallback(Animatable2.AnimationCallback callback)
Adds a callback to listen to the animation events. |
void
|
reset()
Resets the AnimatedVectorDrawable to the start state as specified in the animators. |
void
|
setAlpha(int alpha)
Specify an alpha value for the drawable. |
void
|
setColorFilter(ColorFilter colorFilter)
Specify an optional color filter for the drawable. |
void
|
setHotspot(float x, float y)
Specifies the hotspot's location within the drawable. |
void
|
setHotspotBounds(int left, int top, int right, int bottom)
Sets the bounds to which the hotspot is constrained, if they should be different from the drawable bounds. |
void
|
setTintList(ColorStateList tint)
Specifies tint color for this drawable as a color state list. |
void
|
setTintMode(PorterDuff.Mode tintMode)
Specifies a tint blending mode for this drawable. |
boolean
|
setVisible(boolean visible, boolean restart)
Set whether this Drawable is visible. |
void
|
start()
Starts the drawable's animation. |
void
|
stop()
Stops the drawable's animation. |
boolean
|
unregisterAnimationCallback(Animatable2.AnimationCallback callback)
Removes the specified animation callback. |
Protected methods | |
---|---|
void
|
onBoundsChange(Rect bounds)
Override this in your subclass to change appearance if you vary based on the bounds. |
boolean
|
onLevelChange(int level)
Override this in your subclass to change appearance if you vary based on level. |
boolean
|
onStateChange(int[] state)
Override this in your subclass to change appearance if you recognize the specified state. |
Inherited methods | |
---|---|
From
class
android.graphics.drawable.Drawable
| |
From
class
java.lang.Object
| |
From
interface
android.graphics.drawable.Animatable2
| |
From
interface
android.graphics.drawable.Animatable
|
The animation for the target path, group or vector drawable
Must be a reference to another resource, in the form "@[+][package:]type:name
"
or to a theme attribute in the form "?[package:][type:]name
".
This corresponds to the global attribute
resource symbol animation
.
The static vector drawable.
Must be a reference to another resource, in the form "@[+][package:]type:name
"
or to a theme attribute in the form "?[package:][type:]name
".
This corresponds to the global attribute
resource symbol drawable
.
The name of the target path, group or vector drawable
Must be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character.
This may also be a reference to a resource (in the form
"@[package:]type:name
") or
theme attribute (in the form
"?[package:][type:]name
")
containing a value of this type.
This corresponds to the global attribute
resource symbol name
.
void applyTheme (Resources.Theme t)
Applies the specified theme to this Drawable and its children.
Parameters | |
---|---|
t |
Resources.Theme :
the theme to apply
|
void clearAnimationCallbacks ()
Removes all existing animation callbacks.
void draw (Canvas canvas)
Draw in its bounds (set via setBounds) respecting optional effects such as alpha (set via setAlpha) and color filter (set via setColorFilter).
Parameters | |
---|---|
canvas |
Canvas :
The canvas to draw into
|
int getAlpha ()
AnimatedVectorDrawable is running on render thread now. Therefore, if the root alpha is being animated, then the root alpha value we get from this call could be out of sync with alpha value used in the render thread. Otherwise, the root alpha should be always the same value.
Returns | |
---|---|
int |
the containing vector drawable's root alpha value. |
int getChangingConfigurations ()
Return a mask of the configuration parameters for which this drawable
may change, requiring that it be re-created. The default implementation
returns whatever was provided through
setChangingConfigurations(int)
or 0 by default. Subclasses
may extend this to or in the changing configurations of any other
drawables they hold.
Returns | |
---|---|
int |
Returns a mask of the changing configuration parameters, as
defined by ActivityInfo . |
ColorFilter getColorFilter ()
Returns the current color filter, or null
if none set.
Returns | |
---|---|
ColorFilter |
the current color filter, or null if none set
|
Drawable.ConstantState getConstantState ()
Return a Drawable.ConstantState
instance that holds the shared state of this Drawable.
Returns | |
---|---|
Drawable.ConstantState |
The ConstantState associated to that Drawable. |
int getIntrinsicHeight ()
Returns the drawable's intrinsic height.
Intrinsic height is the height at which the drawable would like to be laid out, including any inherent padding. If the drawable has no intrinsic height, such as a solid color, this method returns -1.
Returns | |
---|---|
int |
the intrinsic height, or -1 if no intrinsic height |
int getIntrinsicWidth ()
Returns the drawable's intrinsic width.
Intrinsic width is the width at which the drawable would like to be laid out, including any inherent padding. If the drawable has no intrinsic width, such as a solid color, this method returns -1.
Returns | |
---|---|
int |
the intrinsic width, or -1 if no intrinsic width |
int getOpacity ()
Return the opacity/transparency of this Drawable. The returned value is
one of the abstract format constants in
PixelFormat
:
UNKNOWN
,
TRANSLUCENT
,
TRANSPARENT
, or
OPAQUE
.
An OPAQUE drawable is one that draws all all content within its bounds, completely covering anything behind the drawable. A TRANSPARENT drawable is one that draws nothing within its bounds, allowing everything behind it to show through. A TRANSLUCENT drawable is a drawable in any other state, where the drawable will draw some, but not all, of the content within its bounds and at least some content behind the drawable will be visible. If the visibility of the drawable's contents cannot be determined, the safest/best return value is TRANSLUCENT.
Generally a Drawable should be as conservative as possible with the
value it returns. For example, if it contains multiple child drawables
and only shows one of them at a time, if only one of the children is
TRANSLUCENT and the others are OPAQUE then TRANSLUCENT should be
returned. You can use the method resolveOpacity(int, int)
to perform a
standard reduction of two opacities to the appropriate single output.
Note that the returned value does not necessarily take into account a
custom alpha or color filter that has been applied by the client through
the setAlpha(int)
or setColorFilter(ColorFilter)
methods. Some subclasses,
such as BitmapDrawable
, ColorDrawable
, and GradientDrawable
,
do account for the value of setAlpha(int)
, but the general behavior is dependent
upon the implementation of the subclass.
Returns | |
---|---|
int |
int The opacity class of the Drawable. |
void getOutline (Outline outline)
Called to get the drawable to populate the Outline that defines its drawing area.
This method is called by the default ViewOutlineProvider
to define
the outline of the View.
The default behavior defines the outline to be the bounding rectangle of 0 alpha. Subclasses that wish to convey a different shape or alpha value must override this method.
Parameters | |
---|---|
outline |
Outline
|
void inflate (Resources res, XmlPullParser parser, AttributeSet attrs, Resources.Theme theme)
Inflate this Drawable from an XML resource optionally styled by a theme. This can't be called more than once for each Drawable. Note that framework may have called this once to create the Drawable instance from XML resource.
Parameters | |
---|---|
res |
Resources :
Resources used to resolve attribute values |
parser |
XmlPullParser :
XML parser from which to inflate this Drawable |
attrs |
AttributeSet :
Base set of attribute values |
theme |
Resources.Theme :
Theme to apply, may be null |
Throws | |
---|---|
XmlPullParserException |
|
IOException |
boolean isRunning ()
Indicates whether the animation is running.
Returns | |
---|---|
boolean |
True if the animation is running, false otherwise. |
boolean isStateful ()
Indicates whether this drawable will change its appearance based on state. Clients can use this to determine whether it is necessary to calculate their state and call setState.
Returns | |
---|---|
boolean |
True if this drawable changes its appearance based on state, false otherwise. |
Drawable mutate ()
Make this drawable mutable. This operation cannot be reversed. A mutable drawable is guaranteed to not share its state with any other drawable. This is especially useful when you need to modify properties of drawables loaded from resources. By default, all drawables instances loaded from the same resource share a common state; if you modify the state of one instance, all the other instances will receive the same modification. Calling this method on a mutable Drawable will have no effect.
Returns | |
---|---|
Drawable |
This drawable. |
boolean onLayoutDirectionChanged (int layoutDirection)
Called when the drawable's resolved layout direction changes.
Parameters | |
---|---|
layoutDirection |
int :
the new resolved layout direction |
Returns | |
---|---|
boolean |
true if the layout direction change has caused the
appearance of the drawable to change such that it needs to be
re-drawn, false otherwise |
void registerAnimationCallback (Animatable2.AnimationCallback callback)
Adds a callback to listen to the animation events.
Parameters | |
---|---|
callback |
Animatable2.AnimationCallback :
Callback to add.
|
void reset ()
Resets the AnimatedVectorDrawable to the start state as specified in the animators.
void setAlpha (int alpha)
Specify an alpha value for the drawable. 0 means fully transparent, and 255 means fully opaque.
Parameters | |
---|---|
alpha |
int
|
void setColorFilter (ColorFilter colorFilter)
Specify an optional color filter for the drawable.
If a Drawable has a ColorFilter, each output pixel of the Drawable's drawing contents will be modified by the color filter before it is blended onto the render target of a Canvas.
Pass null
to remove any existing color filter.
Note: Setting a non-null
color
filter disables tint
.
Parameters | |
---|---|
colorFilter |
ColorFilter :
The color filter to apply, or null to remove the
existing color filter
|
void setHotspot (float x, float y)
Specifies the hotspot's location within the drawable.
Parameters | |
---|---|
x |
float :
The X coordinate of the center of the hotspot |
y |
float :
The Y coordinate of the center of the hotspot
|
void setHotspotBounds (int left, int top, int right, int bottom)
Sets the bounds to which the hotspot is constrained, if they should be different from the drawable bounds.
Parameters | |
---|---|
left |
int :
position in pixels of the left bound |
top |
int :
position in pixels of the top bound |
right |
int :
position in pixels of the right bound |
bottom |
int :
position in pixels of the bottom bound |
void setTintList (ColorStateList tint)
Specifies tint color for this drawable as a color state list.
A Drawable's drawing content will be blended together with its tint
before it is drawn to the screen. This functions similarly to
setColorFilter(int, PorterDuff.Mode)
.
Note: Setting a color filter via
setColorFilter(ColorFilter)
or
setColorFilter(int, PorterDuff.Mode)
overrides tint.
Parameters | |
---|---|
tint |
ColorStateList :
Color state list to use for tinting this drawable, or
null to clear the tint |
void setTintMode (PorterDuff.Mode tintMode)
Specifies a tint blending mode for this drawable.
Defines how this drawable's tint color should be blended into the drawable
before it is drawn to screen. Default tint mode is SRC_IN
.
Note: Setting a color filter via
setColorFilter(ColorFilter)
or
setColorFilter(int, PorterDuff.Mode)
overrides tint.
Parameters | |
---|---|
tintMode |
PorterDuff.Mode :
A Porter-Duff blending mode |
boolean setVisible (boolean visible, boolean restart)
Set whether this Drawable is visible. This generally does not impact the Drawable's behavior, but is a hint that can be used by some Drawables, for example, to decide whether run animations.
Parameters | |
---|---|
visible |
boolean :
Set to true if visible, false if not. |
restart |
boolean :
You can supply true here to force the drawable to behave
as if it has just become visible, even if it had last
been set visible. Used for example to force animations
to restart. |
Returns | |
---|---|
boolean |
boolean Returns true if the new visibility is different than its previous state. |
boolean unregisterAnimationCallback (Animatable2.AnimationCallback callback)
Removes the specified animation callback.
Parameters | |
---|---|
callback |
Animatable2.AnimationCallback :
Callback to remove. |
Returns | |
---|---|
boolean |
false if callback didn't exist in the call back list, or true if
callback has been removed successfully.
|
void onBoundsChange (Rect bounds)
Override this in your subclass to change appearance if you vary based on the bounds.
Parameters | |
---|---|
bounds |
Rect
|
boolean onLevelChange (int level)
Override this in your subclass to change appearance if you vary based on level.
Parameters | |
---|---|
level |
int
|
Returns | |
---|---|
boolean |
Returns true if the level change has caused the appearance of the Drawable to change (that is, it needs to be drawn), else false if it looks the same and there is no need to redraw it since its last level. |
boolean onStateChange (int[] state)
Override this in your subclass to change appearance if you recognize the specified state.
Parameters | |
---|---|
state |
int
|
Returns | |
---|---|
boolean |
Returns true if the state change has caused the appearance of the Drawable to change (that is, it needs to be drawn), else false if it looks the same and there is no need to redraw it since its last state. |