Question

Possible Duplicate:
How to use fade in and fade out effect with an image using Transition, android

http://www.dynamicdrive.com/dynamicindex14/fadeinslideshow.htm

I have seen this link. It shows images by using Fade in and Fade out effects. How could I do this programmatically?

Answer 1

1. create two Animation

   Animation fadeOutAnimation = new AlphaAnimation(1.0f, 0.0f);  
   Animation fadeInAnimation = new AlphaAnimation(0.0f, 1.0f);
   

2. set duration

   fadeOutAnimation.setDuration(1000);
   fadeInAnimation.setDuration(1000);
   

3. set listener – when the fadeout animation finish replace the image

   fadeOutAnimation.setAnimationListener(new AnimationListener() {
   
           @Override
           public void onAnimationStart(Animation animation) {
               // TODO Auto-generated method stub                  
           }
   
           @Override
           public void onAnimationRepeat(Animation animation) {
               // TODO Auto-generated method stub
                               }
   
           @Override
           public void onAnimationEnd(Animation animation) {
               //here switch the images !
               //and the begin the second animation FadeIn 
           }
       });
   

4. ImageView.startAnimation(fadeOutAnimation);