Develop Reference

Why view animation is not gone

I am new in Android. I created ripple animation to hide view, but view do not gone.
Animator anim = ViewAnimationUtils.createCircularReveal(view, 150, 150, 200f, 0f);
anim.start();
I expect that view gone after animation is end.

First of all, the right name for this animation is circular reveal.
You should add the listener to your animation and override method named as onAnimationEnd, then start an animation.
In the onAnimationEnd you should set visibility to the view.
Animator anim = ViewAnimationUtils.createCircularReveal(view, 150, 150, 200f, 0f);
anim.addListener(new AnimatorListenerAdapter() {
#Override
public void onAnimationEnd(Animator animation) {
view.setVisibility(View.INVISIBLE);
}
});
anim.start();

You need to set the duration of the animation
Animator.setDuration(1000)
for example for 1000ms

You need to use setAnimationListener .
Follow this method:
Animator anim = ViewAnimationUtils.createCircularReveal(view, 150, 150, 200f, 0f);
anim.setDuration(1000);
anim.start();
anima.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) {
animation.cancel();
//hide
}
});

Fade out process of textview animation not working properly

So I have a textview at the top of my screen and eight buttons in the middle. What I would like to happen is for the textview to slide in from the right (animation) and then whenever the user clicks a button it makes the textview fade out, changes the text, and then fade back in with the new text. The fading back in and changing the text works fine, but instead of fading out the textview just disappears. The textview also has a problem with the slide in from the left animation in onCreate so i figured it may be something I am missing to do with the textview. Here is my code, someone please help mehh!!
private void AnimationMethodForButtons(TextView TitleArea, int explanation){
ObjectAnimator fadeOut = ObjectAnimator.ofFloat(TitleArea, "alpha", 1.0f, 0.0f);
fadeOut.setDuration(3000);
fadeOut.start();
ObjectAnimator fadeIn = ObjectAnimator.ofFloat(TitleArea, "alpha", 0.0f, 1.0f);
fadeIn.setDuration(3000);
TitleArea.setText(explanation);
fadeIn.start();
}

The start() call is asynchronous. You should be using an AnimatorListener if you want to do something at the end of an animation.
private void AnimationMethodForButtons(final TextView title, final int explaination){
ObjectAnimator fadeOut = ObjectAnimator.ofFloat(title, "alpha", 1.0f, 0.0f);
fadeOut.setDuration(3000);
final ObjectAnimator fadeIn = ObjectAnimator.ofFloat(title, "alpha", 0.0f, 1.0f);
fadeIn.setDuration(3000);
fadeOut.addListener(new Animator.AnimatorListener() {
#Override
public void onAnimationStart(Animator animation) {
}
#Override
public void onAnimationEnd(Animator animation) {
title.setText(explaination);
fadeIn.start();
}
#Override
public void onAnimationCancel(Animator animation) {
}
#Override
public void onAnimationRepeat(Animator animation) {
}
});
fadeOut.start();
}

How to reset ObjectAnimator to it's initial status?

I want to vibrate a view with scaleX and scaleY, and I am doing it with this code, but the problem is that sometimes the view is not correctly reset, and it shows with the scale applied...
I want that when the animation ends, the view must be seen with its original status always
this is the code:
ObjectAnimator scaleX = ObjectAnimator.ofFloat(view, "scaleX", 1f, 0.9f);
scaleX.setDuration(50);
scaleX.setRepeatCount(5);
scaleX.setRepeatMode(Animation.REVERSE);
ObjectAnimator scaleY = ObjectAnimator.ofFloat(view, "scaleY", 1f, 0.9f);
scaleY.setDuration(50);
scaleY.setRepeatCount(5);
scaleY.setRepeatMode(Animation.REVERSE);
set.play(scaleX).with(scaleY);
set.start();
Thanks

For ValueAnimator and ObjectAnimator can be like this a try:
animator.addListener(new AnimatorListenerAdapter() {
#Override
public void onAnimationEnd(Animator animation) {
animation.removeListener(this);
animation.setDuration(0);
((ValueAnimator) animation).reverse();
}
});
UPDATE
On Android 7 it doesn't work.
Best way use the interpolator.
public class ReverseInterpolator implements Interpolator {
private final Interpolator delegate;
public ReverseInterpolator(Interpolator delegate){
this.delegate = delegate;
}
public ReverseInterpolator(){
this(new LinearInterpolator());
}
#Override
public float getInterpolation(float input) {
return 1 - delegate.getInterpolation(input);
}
}
In your code
animator.addListener(new AnimatorListenerAdapter() {
#Override
public void onAnimationEnd(Animator animation) {
animation.removeListener(this);
animation.setDuration(0);
animation.setInterpolator(new ReverseInterpolator());
animation.start();
}
});

According to the docs(Property Animation):
The property animation system can animate Views on the screen by changing the actual properties in the View objects. In addition, Views also automatically call the invalidate() method to refresh the screen whenever its properties are changed.
so you can use AnimatorListener to listen the animation event, then just reset the view property you animate. let's say cancel event and scaleX property:
scaleAnimator.setListener(new AnimatorListenerAdapter() {
#Override
public void onAnimationCancel(Animator animation) {
scaleView.setScaleX(0)
}
});
Hope this can help a bit.

You can add an AnimatorListener, to be notified when the animation ends:
scaleY.addListener(new AnimatorListener() {
#Override
public void onAnimationEnd(Animator animation) {
// TODO Restore view
}
#Override
public void onAnimationStart(Animator animation) {
}
#Override
public void onAnimationRepeat(Animator animation) {
}
#Override
public void onAnimationCancel(Animator animation) {
}
});

Android Multiple AnimatorSet reset

Hi I am applying multiple animations to a view using AnimatorSet and ValueAnimator.
When the user touches the view, successive animations are applied to the view. I do this to have a "zooming effect" when the user is moving his fingers on the view.
The view is a custom gallery.
Here is the code for animation:
private void createAnim(final View v) {
animating = true;
if (D)
Log.i(TAG, "sarting animation");
try {
v.clearAnimation();
v.getAnimation().reset();
} catch (Exception e) {
}
set = new AnimatorSet();
set.addListener(new AnimatorListener() {
#Override
public void onAnimationStart(Animator animation) {
}
#Override
public void onAnimationRepeat(Animator animation) {
}
#Override
public void onAnimationEnd(Animator animation) {
if (D)
Log.i(TAG, "Animation ended");
animating = false;
}
#Override
public void onAnimationCancel(Animator animation) {
animating = false;
if (D)
Log.i(TAG, "Animation cancelled");
}
});
set.setDuration(100);
ValueAnimator v1 = ObjectAnimator.ofFloat(v, "scaleX", mScaleFactor);
ValueAnimator v2 = ObjectAnimator.ofFloat(v, "scaleY", mScaleFactor);
animationList.add(v1);
animationList.add(v2);
set.playTogether(v1, v2);
set.start()
}
I have an onTouchListener and on action move I successively call this method increasing or decreasing the mScaleFactor.
When the user releases the finger I would like the view to go back to previous state, I mean to erase all animations applied as if they were never applied to view. The problem is you can easily do that for one animation but for many like that I just can't find the right way. Here is what I have tried:
-Adding the animations to an ArrayList and doing animation.reverse() on each one of them with a delay of +100 added to each of them so the execute one after another but the end result just doesn't seem exactly the same as before animations.
v.clearAnimation(); only cancels the last animation
v.getAnimation().reset(); same only works for last/active animation.
Is there a method to just get the view back as it was before any animation has been started?
Thanks a lot

Reversing the effects of an AnimatorSet can be tricky simply because there is no "reverse" method. The easiest method in this case, would probably simply be another AnimatorSet that does the opposite of the original. The issue here would be is your AnimatorListener could be out of sync. If you do this way and you want to keep the boolean, then you'd have to implement it as somewhat of a semaphore.
public static class AnimatorTracker implements AnimatorListener{
int counter;
public AnimatorTracker() {
counter = 0;
}
public boolean isAnimating() {
return counter == 0;
}
#Override
public void onAnimationStart(Animator animation) {
counter++;
}
#Override
public void onAnimationRepeat(Animator animation) {
}
#Override
public void onAnimationEnd(Animator animation) {
counter--;
}
#Override
public void onAnimationCancel(Animator animation) {
// Canceling an animation invokes onAnimationEnd, so nothing needs to be done.
}
}
Then just make the sets the same way you just did:
AnimatorTracker tracker = new AnimatorTracker(); // or make it a global reference
AnimatorSet set = new AnimatorSet();
AnimatorSet reverseSet = new AnimatorSet();
ValueAnimator v1 = ObjectAnimator.ofFloat(v, "scaleX", mScaleFactor);
ValueAnimator v2 = ObjectAnimator.ofFloat(v, "scaleY", mScaleFactor);
ValueAnimator reverseV1 = ObjectAnimator.ofFloat(v, "scaleX", 1.0f);
ValueAnimator reverseV2 = ObjectAnimator.ofFloat(v, "scaleY", 1.0f);
set.addListener(tracker);
set.setDuration(100);
set.playTogether(v1, v2);
reverseSet.addListener(tracker);
reverseSet.setDuration(100);
reverseSet.playTogether(reverseV1, reverseV2);
Call set.start() when you want to animate forward. Call reverseSet.start() when you want to animate back.

How to animate process of hiding view?

I want to create view that will hide behide other view with nice visual effect. Firstly, I look on Android developer docs and find animatiion framework and write code like this:
Animation animation = new TranslateAnimation(Animation.ABSOLUTE, 0.0f,
Animation.ABSOLUTE, 0.0f, Animation.ABSOLUTE, 0.0f, Animation.ABSOLUTE, -80.0f);
animation.setDuration(200);
animation.setInterpolator(new AccelerateInterpolator());
searchButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
searchContainer.startAnimation(animation);
findViewById(R.id.explore_place_search).setVisibility(View.GONE);
}
});
So I get movement when I click on the button but I want to freeze view on the last position when animation has completed. Better approach move view when user touch this element (MotionEvent.ACTION_DOWN). Can I ask you about how to do that or where I can read about same cases? All help will be appreciated.

Lots of thoughts there... Animations are fairly simple in android, take a look at the api demoes: http://developer.android.com/resources/samples/ApiDemos/index.html
Here is an example of two imageviews fading in and out on top of eachother:
Animation fadeIn = new AlphaAnimation(0.00f, 1.00f);
fadeIn.setDuration(1000);
fadeIn.setAnimationListener(new AnimationListener() {
public void onAnimationStart(Animation animation) {}
public void onAnimationRepeat(Animation animation) {}
public void onAnimationEnd(Animation animation) {}
});
Animation fadeOut = new AlphaAnimation(1.00f, 0.00f);
fadeOut.setDuration(1000);
fadeOut.setAnimationListener(new AnimationListener() {
public void onAnimationStart(Animation animation) {}
public void onAnimationRepeat(Animation animation) {}
public void onAnimationEnd(Animation animation) {
placeholderImageView.setVisibility(View.GONE);
}
});
imageView.setImageBitmap(bitmap);
placeholderImageView.startAnimation(fadeOut);
imageView.startAnimation(fadeIn);
This is done in code but animation can just as well be done with xml.