Android animation XML (2)

Animation can also be stored in an XML file, which improves the maintainability of the program. To write an animation in XML, follow these steps:

1. Create a folder named anim under the res folder

2. Create an xml file and add the set tag first. Modify the tag as follows:

<Set xmlns: android = "http://schemas.android.com/apk/res/android"
Android: interpolator = "@ android: anim/accelerate_interpolator">
 
</Set>

3. Add the rotate, alpha, scale, or translate tag to the tag.

4. Use AnimationUtils in the code to load the xml file and generate the Animation object.

Alpha Animation

[Java]
<SPAN style = "FONT-SIZE: 18px"> <? Xml version = "1.0" encoding = "UTF-8"?>
<Set xmlns: android = "http://schemas.android.com/apk/res/android"
Android: interpolator = "@ android: anim/accelerate_interpolator">
<Alpha
Android: fromalphi = "1.0"
Android: toAlpha = "0.0"
Android: startOffset = "500"
Android: duration= "2000"
/>
 
</Set> </SPAN>

<? Xml version = "1.0" encoding = "UTF-8"?>
<Set xmlns: android = "http://schemas.android.com/apk/res/android"
Android: interpolator = "@ android: anim/accelerate_interpolator">
<Alpha
Android: fromalphi = "1.0"
Android: toAlpha = "0.0"
Android: startOffset = "500"
Android: duration= "2000"
/>

</Set> Animation a = AnimationUtils. loadAnimation (this, R. anim. alpha );
Iv. startAnimation ();

Scale Animation

[Html]
<SPAN style = "FONT-SIZE: 18px"> <? Xml version = "1.0" encoding = "UTF-8"?>
<Set xmlns: android = "http://schemas.android.com/apk/res/android"
Android: interpolator = "@ android: anim/accelerate_interpolator">
<Scale
Android: fromXScale = "1.0"
Android: toXScale = "0.0"
Android: fromYScale = "1.0"
Android: toYScale = "0.0"
Android: Required Tx = "50%"
Android: Ty = "50%"
Android: duration= "2000"
/>
 
</Set> </SPAN>

<? Xml version = "1.0" encoding = "UTF-8"?>
<Set xmlns: android = "http://schemas.android.com/apk/res/android"
Android: interpolator = "@ android: anim/accelerate_interpolator">
<Scale
Android: fromXScale = "1.0"
Android: toXScale = "0.0"
Android: fromYScale = "1.0"
Android: toYScale = "0.0"
Android: Required Tx = "50%"
Android: Ty = "50%"
Android: duration= "2000"
/>

</Set>
Rotate Animation

[Html]
<SPAN style = "FONT-SIZE: 18px"> <? Xml version = "1.0" encoding = "UTF-8"?>
<Set xmlns: android = "http://schemas.android.com/apk/res/android"
Android: interpolator = "@ android: anim/accelerate_interpolator">
<Rotate
Android: fromDegrees = "0"
Android: toDegrees = "400"
Android: Required Tx = "50%"
Android: Ty = "50%"
Android: duration= "3000"
/>
 
</Set> </SPAN>

<? Xml version = "1.0" encoding = "UTF-8"?>
<Set xmlns: android = "http://schemas.android.com/apk/res/android"
Android: interpolator = "@ android: anim/accelerate_interpolator">
<Rotate
Android: fromDegrees = "0"
Android: toDegrees = "400"
Android: Required Tx = "50%"
Android: Ty = "50%"
Android: duration= "3000"
/>

</Set>
Translate Animation

[Html]
<SPAN style = "FONT-SIZE: 18px"> <? Xml version = "1.0" encoding = "UTF-8"?>
<Set xmlns: android = "http://schemas.android.com/apk/res/android"
Android: interpolator = "@ android: anim/accelerate_interpolator">
<Translate
Android: fromxdel= "50%"
Android: toXDelta = "100%"
Android: fromYDelta = "50%"
Android: toYDelta = "100%"
Android: duration= "3000"
/>
 
</Set> </SPAN>

<? Xml version = "1.0" encoding = "UTF-8"?>
<Set xmlns: android = "http://schemas.android.com/apk/res/android"
Android: interpolator = "@ android: anim/accelerate_interpolator">
<Translate
Android: fromxdel= "50%"
Android: toXDelta = "100%"
Android: fromYDelta = "50%"
Android: toYDelta = "100%"
Android: duration= "3000"
/>

</Set>
Here we will focus on android: javastx and android: policty and android: fromXDelta, android: toXDelta

Android: Required Tx = "50" use absolute coordinates

Android: relative Tx = "50%" relative to yourself

Android: relative Tx = "50% p" relative to parent Control