Animation Demo in Android(Tween Animation)

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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.xml The filename will be used as the resource ID.

compiled resource datatype:

Resource pointer to an Animation.

resource reference:

In Java: R.anim.filename In 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 <set> elements).

elements:

<set>

A container that holds other animation elements (<alpha>, <scale>, <translate>, <rotate>) or other <set> elements. Represents an AnimationSet.

attributes:

android:interpolator

Interpolator resource. An Interpolator to apply on the animation. The value must be a reference to a resource that specifies an interpolator (not an interpolator class name). There are default interpolator resources available from the platform or you can create your own interpolator resource. See the discussion below for more about Interpolators.

android:shareInterpolator

Boolean. "true" if you want to share the same interpolator among all child elements.

<alpha>

A fade-in or fade-out animation. Represents an AlphaAnimation.

attributes:

android:fromAlpha

Float. Starting opacity offset, where 0.0 is transparent and 1.0 is opaque.

android:toAlpha

Float. Ending opacity offset, where 0.0 is transparent and 1.0 is opaque.

For more attributes supported by <alpha>, see the Animation class reference (of which, all XML attributes are inherrited by this element).

<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.

attributes:

android:fromXScale

Float. Starting X size offset, where 1.0 is no change.

android:toXScale

Float. Ending X size offset, where 1.0 is no change.

android:fromYScale

Float. Starting Y size offset, where 1.0 is no change.

android:toYScale

Float. Ending Y size offset, where 1.0 is no change.

android:pivotX

Float. The X coordinate to remain fixed when the object is scaled.

android:pivotY

Float. The Y coordinate to remain fixed when the object is scaled.

For more attributes supported by <scale>, see the Animation class reference (of which, all XML attributes are inherrited by this element).

<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.

attributes:

android:fromXDelta

Float or percentage. Starting X offset. Expressed either: in pixels relative to the normal position (such as "5"), in percentage relative to the element width (such as "5%"), or in percentage relative to the parent width (such as "5%p").

android:toXDelta

Float or percentage. Ending X offset. Expressed either: in pixels relative to the normal position (such as "5"), in percentage relative to the element width (such as "5%"), or in percentage relative to the parent width (such as "5%p").

android:fromYDelta

Float or percentage. Starting Y offset. Expressed either: in pixels relative to the normal position (such as "5"), in percentage relative to the element height (such as "5%"), or in percentage relative to the parent height (such as "5%p").

android:toYDelta

Float or percentage. Ending Y offset. Expressed either: in pixels relative to the normal position (such as "5"), in percentage relative to the element height (such as "5%"), or in percentage relative to the parent height (such as "5%p").

For more attributes supported by <translate>, see the Animation class reference (of which, all XML attributes are inherrited by this element).

<rotate>

A rotation animation. Represents a RotateAnimation.

attributes:

android:fromDegrees

Float. Starting angular position, in degrees.

android:toDegrees

Float. Ending angular position, in degrees.

android:pivotX

Float or percentage. The X coordinate of the center of rotation. Expressed either: in pixels relative to the object's left edge (such as "5"), in percentage relative to the object's left edge (such as"5%"), or in percentage relative to the parent container's left edge (such as "5%p").

android:pivotY

Float or percentage. The Y coordinate of the center of rotation. Expressed either: in pixels relative to the object's top edge (such as "5"), in percentage relative to the object's top edge (such as"5%"), or in percentage relative to the parent container's top edge (such as "5%p").

For more attributes supported by <rotate>, see the Animation class reference (of which, all XML attributes are inherrited by this element).

example:

XML file saved at res/anim/property.xml:

 <?xml version="1.0" encoding="utf-8"?>
<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="5.6"
            android:toXScale="2"
            android:fromYScale="5.0"
            android:toYScale="0.0"
            android:pivotX="25%"
            android:pivotY="50%"
            android:duration="500" />
        <rotate
            android:fromDegrees="0"
            android:toDegrees="-90"
            android:toYScale="0.0"
            android:pivotX="50%"
            android:pivotY="50%"
            android:duration="700" />
    </set>
</set>

This application code will apply the animation to an ImageView and start the animation:

import android.os.Bundle;
import android.animation.AnimatorInflater;
import android.animation.AnimatorSet;
import android.app.Activity;
import android.view.Menu;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.TextView;
//O@K Tech..
public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.animator);
        ImageView img = (ImageView)findViewById(R.id.imageView1);
        Animation amnt = AnimationUtils.loadAnimation(this,R.anim.property);
        img.startAnimation(amnt);
       
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}