Fade In Fade Out Android Animation in Java

Question

I want to have a 2 second animation of an ImageView that spends 1000ms fading in and then 1000ms fading out.

Here's what I have so far in my ImageView constructor:

Animation fadeIn = new AlphaAnimation(0, 1);
fadeIn.setDuration(1000);

Animation fadeOut = new AlphaAnimation(1, 0);
fadeOut.setStartOffset(1000);
fadeOut.setDuration(1000);

AnimationSet animation = new AnimationSet(true);
animation.addAnimation(fadeIn);
animation.addAnimation(fadeOut);
this.setAnimation(animation);

When I run that animation, nothing shows up. However, when I remove one of the alpha animations, the behavior works as expected.

Things I have already tried:

• Every conceivable combination of setFillBefore, setFillAfter, and setFillEnabled.
• Adding a LinearInterpolator to the AnimationSet.

Answer 1

If you use Animator for make animation you can

anim (directory) -> fade_out.xml

<?xml version="1.0" encoding="UTF-8"?>
<objectAnimator
    android:propertyName="alpha"
    android:valueFrom="0"
    android:valueTo="1"
    xmlns:android="http://schemas.android.com/apk/res/android"/>

In java

Animator animator = AnimatorInflater.loadAnimator(context, R.animator.fade_out);
animator.setTarget(the_view_you_want_to_animation);
animator.setDuration(1000);
animator.start();

Other way to make animation fade out with only java code is

ObjectAnimator fadeOut = ObjectAnimator.ofFloat(the_view_you_want_to_animation, "alpha",  1f, 0);
fadeOut.setDuration(2000);
fadeOut.start();

Answer 2

viewToAnimate.animate().alpha(1).setDuration(1000).setInterpolator(new DecelerateInterpolator()).withEndAction(new Runnable() {
    @Override
    public void run() {
        viewToAnimate.animate().alpha(0).setDuration(1000).setInterpolator(new AccelerateInterpolator()).start();
    }
}).start();

Answer 3

Another alternative:

No need to define 2 animation for fadeIn and fadeOut. fadeOut is reverse of fadeIn.

So you can do this with Animation.REVERSE like this:

AlphaAnimation alphaAnimation = new AlphaAnimation(0.0f, 1.0f);
alphaAnimation.setDuration(1000);
alphaAnimation.setRepeatCount(1);
alphaAnimation.setRepeatMode(Animation.REVERSE);
view.findViewById(R.id.imageview_logo).startAnimation(alphaAnimation);

then onAnimationEnd:

alphaAnimation.setAnimationListener(new Animation.AnimationListener() {
    @Override
        public void onAnimationStart(Animation animation) {
            //TODO: Run when animation start
        }

        @Override
        public void onAnimationEnd(Animation animation) {
            //TODO: Run when animation end
        }

        @Override
        public void onAnimationRepeat(Animation animation) {
            //TODO: Run when animation repeat
        }
    });

Answer 4

Here is my solution using AnimatorSet which seems to be a bit more reliable than AnimationSet.

// Custom animation on image
ImageView myView = (ImageView)splashDialog.findViewById(R.id.splashscreenImage);

ObjectAnimator fadeOut = ObjectAnimator.ofFloat(myView, "alpha",  1f, .3f);
fadeOut.setDuration(2000);
ObjectAnimator fadeIn = ObjectAnimator.ofFloat(myView, "alpha", .3f, 1f);
fadeIn.setDuration(2000);

final AnimatorSet mAnimationSet = new AnimatorSet();

mAnimationSet.play(fadeIn).after(fadeOut);

mAnimationSet.addListener(new AnimatorListenerAdapter() {
    @Override
    public void onAnimationEnd(Animator animation) {
        super.onAnimationEnd(animation);
        mAnimationSet.start();
    }
});
mAnimationSet.start();

Answer 5

Figured out my own problem. The solution ended up being based in interpolators.

Animation fadeIn = new AlphaAnimation(0, 1);
fadeIn.setInterpolator(new DecelerateInterpolator()); //add this
fadeIn.setDuration(1000);

Animation fadeOut = new AlphaAnimation(1, 0);
fadeOut.setInterpolator(new AccelerateInterpolator()); //and this
fadeOut.setStartOffset(1000);
fadeOut.setDuration(1000);

AnimationSet animation = new AnimationSet(false); //change to false
animation.addAnimation(fadeIn);
animation.addAnimation(fadeOut);
this.setAnimation(animation);

Answer 6

I know that this already has been answered but.....

<?xml version="1.0" encoding="utf-8"?> 
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromAlpha="1.0" 
    android:toAlpha="0.0" 
    android:duration="1000"    
    android:repeatCount="infinite" 
    android:repeatMode="reverse"
    />

Quick and easy way to quickly do a fade in and out with a self repeat. Enjoy

EDIT : In your activity add this:

yourView.startAnimation(AnimationUtils.loadAnimation(co‌​ntext, R.anim.yourAnimation));