A012-anim resources, androidanim

A012-anim resources, androidanim

Anim resources refer to View Animation in Android. However, View Animation is divided:
-Tween Animation)
-Frame Animation (Frame-by-Frame Animation)

Tween Animation

File Path: res/anim/filename. xml
Such a resource points to an Animation object
Resource reference:
-Reference in Java: R. anim. filename
-Reference in XML: @ 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

<set> <alpha> <scale> <translate> <rotate>
These labels can all be used as root labels to represent an animation.<set>You can include all the preceding labels.<set>And other tag combinations to design a variety of animation effects.
The functions of tag parsing are as follows:

<set>

Represents an AnimationSet
Attribute:
-Android: interpolator)
-Android: generator interpolator (whether to share the interpolation tool among all elements)

<alpha>

Represents an AlphaAnimation, fade in and out animation
Attribute:
-Android: fromAlpha (start transparency, 0.0-completely transparent 1.0-not completely transparent)
-Android: toAlpha (end transparency, 0.0-completely transparent 1.0-not completely transparent)

<scale>

Represents a ScaleAnimation, scaling Animation
Attribute:
-Android: fromXScale (scale relative to itself in the X direction at the beginning, 1.0 indicates no change)
-Android: toXScale (the zooming ratio of X to itself at the end)
-Android: fromYScale (scale relative to itself in the Y direction at the beginning)
-Android: toYScale (the zooming ratio of Y to itself at the end)
-Android: zoomed TX (scaled X axis position, 50 indicates absolute position, 50% indicates relative self, 50% p indicates relative parent Control)
-Android: Ty (zooming the Y axis, with the same value as above)

<translate>

Represents a TranslateAnimation, an offset Animation
-Android: fromXDelta (position on the X coordinate when the animation starts)
-Android: toXDelta (position on the X coordinate when the animation ends)
-Android: fromYDelta (position on Y coordinate when the animation starts)
-Android: toYDelta (position on Y coordinate when the animation ends)

Example:
Android: toXDelta = "100%", indicating its own 100%, that is, starting from the View's own position
Android: toXDelta = "80% p", indicating the 80% of the parent View, which is based on its parent View

<rotate>

Represents a RotateAnimation, rotating Animation
Attribute:
-Android: fromDegrees (animation start angle)
-Android: toDegrees (angle at animation end)
-Android: Rotate TX (X coordinate of the rotation center)
-Android: Rotate ty (Y coordinate of the rotation center)

Animation 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>

Use in code:

ImageView image = (ImageView) findViewById(R.id.image);Animation hyperspaceJump = AnimationUtils.loadAnimation(this, R.anim.hyperspace_jump);image.startAnimation(hyperspaceJump);

Frame Animation

File Path: res/drawable/filename. xml
Such a resource points to an AnimationDrawable object.
Resource reference:
-Reference in Java: R. drawable. filename
-Reference in XML: @ 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>

Attribute:
-Android: oneshot (whether to play only once)

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>

An item indicates a frame, a frame corresponds to an image, and duration indicates the duration.

Use in code:

ImageView rocketImage = (ImageView) findViewById(R.id.rocket_image);rocketImage.setBackgroundResource(R.drawable.rocket_thrust);rocketAnimation = (AnimationDrawable) rocketImage.getBackground();rocketAnimation.start();

This section describes the knowledge points and usage of anim resources in Android. For more information, visit the following address:
Http://www.android-doc.com/guide/topics/resources/animation-resource.html

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