Animation Resource
An animation resource can define one of two types of animations:1.Property Animation: Creates an animation by modifying an object's property values over a set period of time with an Animator.
2.View Animation: There are two types of animations that you can do with the view animation framework:
Tween animation: Creates an animation by performing a series of transformations on a single image with an Animation
Frame animation: or creates an animation by showing a sequence of images in order with an AnimationDrawable.
Property Animation:
An animation defined in XML that modifies properties of the target object, such as background color or alpha value, over a set amount of time.FILE LOCATION:
res/animator/filename.xmlThe filename will be used as the resource ID.
COMPILED RESOURCE DATATYPE:
Resource pointer to a ValueAnimator, ObjectAnimator, or AnimatorSet.RESOURCE REFERENCE:
In Java: R.animator.filenameIn XML: @[package:]animator/filename
SYNTAX:
<set
android:ordering=["together" | "sequentially"]>
<objectAnimator
android:propertyName="string"
android:duration="int"
android:valueFrom="float | int | color"
android:valueTo="float | int | color"
android:startOffset="int"
android:repeatCount="int"
android:repeatMode=["repeat" | "reverse"]
android:valueType=["intType" | "floatType"]/>
<animator
android:duration="int"
android:valueFrom="float | int | color"
android:valueTo="float | int | color"
android:startOffset="int"
android:repeatCount="int"
android:repeatMode=["repeat" | "reverse"]
android:valueType=["intType" | "floatType"]/>
<set>
...
</set>
</set>
ELEMENTS:
<set>: A container that holds other animation elements (<objectAnimator>, <valueAnimator>, or other <set> elements). Represents an AnimatorSet.You can specify nested <set> tags to further group animations together. Each <set> can define its own ordering attribute.
<objectAnimator>: Animates a specific property of an object over a specific amount of time. Represents an ObjectAnimator.
<animator>: Performs an animation over a specified amount of time. Represents a ValueAnimator.
EXAMPLE:
<set android:ordering="sequentially">In order to run this animation, you must inflate the XML resources in your code to an AnimatorSet object, and then set the target objects for all of the animations before starting the animation set. Calling setTarget() sets a single target object for all children of the AnimatorSet as a convenience. The following code shows how to do this:
<set>
<objectAnimator
android:propertyName="x"
android:duration="500"
android:valueTo="400"
android:valueType="intType"/>
<objectAnimator
android:propertyName="y"
android:duration="500"
android:valueTo="300"
android:valueType="intType"/>
</set>
<objectAnimator
android:propertyName="alpha"
android:duration="500"
android:valueTo="1f"/>
</set>
AnimatorSet set = (AnimatorSet) AnimatorInflater.loadAnimator(myContext,R.anim.property_animator);
set.setTarget(myObject);
set.start();
View Animation:
The view animation framework supports both tween and frame by frame animations, which can both be declared in XML. The following sections describe how to use both methods.Tween animation:
An animation defined in XML that performs transitions such as rotating, fading, moving, and stretching on a graphic.FILE LOCATION:
res/anim/filename.xmlThe filename will be used as the resource ID.
COMPILED RESOURCE DATATYPE:
Resource pointer to an Animation.RESOURCE REFERENCE:
In Java: R.anim.filenameIn XML: @[package:]anim/filename
SYNTAX:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@[package:]anim/interpolator_resource"
android:shareInterpolator=["true" | "false"] >
<alpha
android:fromAlpha="float"
android:toAlpha="float" />
<scale
android:fromXScale="float"
android:toXScale="float"
android:fromYScale="float"
android:toYScale="float"
android:pivotX="float"
android:pivotY="float" />
<translate
android:fromXDelta="float"
android:toXDelta="float"
android:fromYDelta="float"
android:toYDelta="float" />
<rotate
android:fromDegrees="float"
android:toDegrees="float"
android:pivotX="float"
android:pivotY="float" />
<set>
...
</set>
</set>
The file must have a single root element: either an <alpha>, <scale>, <translate>, <rotate>, or <set> element that holds a group (or groups) of other animation elements (even nested elements).
ELEMENTS:
<set>: A container that holds other animation elements (<objectAnimator>,<valueAnimator>, or other <set>) or other elements. Represents an AnimationSet.
<alpha>: A fade-in or fade-out animation. Represents an AlphaAnimation.
<scale>: A resizing animation. You can specify the center point of the image from which it grows outward (or inward) by specifying pivotX and pivotY. For example, if these values are 0, 0 (top-left corner), all growth will be down and to the right. Represents a ScaleAnimation.
<translate>: A vertical and/or horizontal motion. Supports the following attributes in any of the following three formats: values from -100 to 100 ending with "%", indicating a percentage relative to itself; values from -100 to 100 ending in "%p", indicating a percentage relative to its parent; a float value with no suffix, indicating an absolute value. Represents a TranslateAnimation.
<rotate>: A rotation animation. Represents a RotateAnimation.
EXAMPLE:
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false">
<scale
android:interpolator="@android:anim/accelerate_decelerate_interpolator"
android:fromXScale="1.0"
android:toXScale="1.4"
android:fromYScale="1.0"
android:toYScale="0.6"
android:pivotX="50%"
android:pivotY="50%"
android:fillAfter="false"
android:duration="700" />
<set
android:interpolator="@android:anim/accelerate_interpolator"
android:startOffset="700">
<scale
android:fromXScale="1.4"
android:toXScale="0.0"
android:fromYScale="0.6"
android:toYScale="0.0"
android:pivotX="50%"
android:pivotY="50%"
android:duration="400" />
<rotate
android:fromDegrees="0"
android:toDegrees="-45"
android:toYScale="0.0"
android:pivotX="50%"
android:pivotY="50%"
android:duration="400" />
</set>
</set>
This application code will apply the animation to an ImageView and start the animation:
ImageView image = (ImageView) findViewById(R.id.image);
Animation hyperspaceJump = AnimationUtils.loadAnimation(this, R.anim.hyperspace_jump);
image.startAnimation(hyperspaceJump);
Frame animation
An animation defined in XML that shows a sequence of images in order (like a film).FILE LOCATION:
res/drawable/filename.xmlThe filename will be used as the resource ID.
COMPILED RESOURCE DATATYPE:
Resource pointer to an AnimationDrawable.RESOURCE REFERENCE:
In Java: R.drawable.filenameIn XML: @[package:]drawable.filename
SYNTAX:
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot=["true" | "false"]
<item
android:drawable="@[package:]drawable/drawable_resource_name"
android:duration="integer" />
</animation-list>
ELEMENTS:
<animation-list>: Required. This must be the root element. Contains one or more <item> elements.<item>: A single frame of animation. Must be a child of a <animation-list> element.
EXAMPLE:
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="false">
<item android:drawable="@drawable/rocket_thrust1" android:duration="200" />
<item android:drawable="@drawable/rocket_thrust2" android:duration="200" />
<item android:drawable="@drawable/rocket_thrust3" android:duration="200" />
</animation-list>
This application code will set the animation as the background for a View, then play the animation:
ImageView rocketImage = (ImageView) findViewById(R.id.rocket_image);I hope this programming note helps you! Thanks for being here! See you in the next programming post.
rocketImage.setBackgroundResource(R.drawable.rocket_thrust);
rocketAnimation = (AnimationDrawable) rocketImage.getBackground();
rocketAnimation.start();
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