Android Animations Animation using detailed

One, animation type

The Android animation consists of four types: alpha, scale, translate, rotate

In an XML configuration file

Second, Android animation mode

There are two main animation modes of animation: tweened and Frame

One is tweened animation (gradient animation)

Definition of animation in XML file

① open Eclipse, new Android Project

② New Anim folder in res directory

③ a new myanim.xml in the Anim directory (note file name lowercase)

④ Animation code to add XML

<?xml 

version= "1.0" encoding= "Utf-8"?> <set xmlns:android=    
"http://schemas.android.com/apk/res/" Android >    
  <alpha/>    
  <scale/>    
  <translate/>    
  <rotate/>    
</set>

Iv. Analysis of Android XML animation

1. Alpha

<?xml version= "1.0" encoding= "Utf-8"?> <set xmlns:android= 

   
"http://schemas.android.com/apk/res/" Android ">    
<alpha
android:fromalpha=" 0.1 "
android:toalpha=" 1.0 "
android:duration=" "3000"
/>     
<!--transparency Control animation effect Alpha    
        floating-point value:    
            Fromalpha property is the transparency at the beginning of the animation    
            Toalpha   property for the animation at the end of the opacity    
            description:     
                0.0 means full transparency    
                1.0 indicates total opacity    
            the numeric long value of the float data type between 0.0-1.0 and above value    
         
        :    
            duration  property for animation duration    
            Description:         
                time in milliseconds    
-->
</set>