Question

Create a simple Animation resource file (XML) which will animate a given image as follows:
Move the image to left by 5%
Move the image to right by 5%
Move the image to left by 5%
Set the duration of animation to 0.1 seconds each.

Answer 1

solution:

<?xml version="1.0" encoding="utf-8"?>
<set
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/linear_interpolator"
    android:fillAfter="true">

    <translate
        android:fromXDelta="0%p"
        android:toXDelta="5%p"
        android:duration="100" />
</set>

<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:fillAfter="true"
    android:interpolator="@android:anim/linear_interpolator" >

    <translate
        android:fromXDelta="0%p"
        android:toXDelta="-5%p"
        android:duration="100"
        android:startOffset="0" />

    <translate
        android:fromXDelta="-5%p"
        android:toXDelta="5%p"
        android:duration="100"
        android:startOffset="100" />

    <translate
        android:fromXDelta="0%p"
        android:toXDelta="-5%p"
        android:duration="100" 
        android:startOffset="200"/>

</set>

We control the animation sequence using startOffset. When the start() method is called to begin the animation, we have got the first animation starting at time 0, the second at time 100 and third at time 200. These times are in milliseconds.

fromXDelta specifies the the position from the original where the image is shifted. ToXDelta specifies the final location of the image.

duration specifies the time of the animation.

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