Android Animation Properties Animation

Animation

In the Android program often use animation effect, and animation effect is mainly animation to achieve, the API gives the explanation:

　　

It contains 4 animation effects

Alphaanimation Gradient Transparency

Rotateanimation Screen Rotation

Scaleanimation Gradient Size scaling

Translateanimation Position Movement

But if you want to combine these animation effects, you need a class Animationset animation set .

Here's a simple explanation for these classes:

　examples of alphaanimation :

1     New Alphaanimation (0.1f, 1.0f); 2             Alpha.setduration (+); 3             Image.startanimation (Alpha);

The transparency changes from 0.1f to 1.0f, and the event required for the change is 2s;

　　examples of rotateanimation :

1 New rotateanimation (0f, 360f); 2             Rotate.setduration (+); 3             Image.startanimation (rotate);

Rotates from 0 degrees to 360 degrees, duration is 2S

　　Examples of scaleanimation:

New Scaleanimation (0.1f, 1.0f, 0.1f, 1.0f);            Scale.setduration (+);            Image.startanimation (scale);

The length on the x-axis changes from 0.1 to 1.0f (view original width)

The length on the y-axis changes from 0.1 to 1.0f (view original length)

　　Examples of translateanimation:

 1  Animation translate =  New   Translateanimation (  2  animation.relative_to_self, 1.0f 3  animation.relative_to_self, 0.0f 4  animation.relative_to_self, 1.0f 5  animation.relative_to_self, 0.0f 6  translate.setduration (2000) ; 

　　Examples of Animationset:

Animation rotate1 =Newrotateanimation (0f, 360f); Animation translate1=Newtranslateanimation (animation.relative_to_self,1.0f, Animation.relative_to_self,0.0f, Animation.relative_to_self,1.0f, Animation.relative_to_self,0.0f); Animationset Set=NewAnimationset (true);            Set.addanimation (ROTATE1);            Set.addanimation (TRANSLATE1); Set.setduration (2000); Image.startanimation (set);

In addition to adding animations to the code, you can also define the animation directly in the XML file, which is OK on the direct call, for example:

1     <?XML version= "1.0" encoding= "Utf-8"?>  2     <Setxmlns:android= "Http://schemas.android.com/apk/res/android">  3         <Alpha4             Android:fromalpha= "0.1"  5 Android:toalpha= "1.0"  6 android:duration= "$"  7         />  8     </Set>  

Program code Effects:

Each button corresponds to a different animation

　　

　　

Code download: Download