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.
Related
I am trying to implement something like:
motion trail animation
motion blur animation
ghost animation
(i do not know correct name of "effect") for repeatedly change view position.
Function, which is called repeatedly according accelerometer changes:
public void setXY(float x, float y) {
if(view != null) {
overloadPoint.setX(pointX);
overloadPoint.setY(pointY);
}
}
My goal:
For change X,Y animation show path (line, curve) between old and new view position.
OR alternative goal:
Between old and new view position, i would like to freeze old position and apply for example alpha effect to view in old position from 1.0f to 0.0f, duration:100ms. So when method is called for example every 50ms, i will see two views. Both views will have fade out effect (alpha 1.0f -> 0.0f), but older will have less alpha.
For: API >= 21
I tried:
public void setXY(float x, float y){
final View view = new View(this);
view.setLayoutParams(new LinearLayout.LayoutParams(
25, //TODO
25)); //TODO
view.setBackgroundResource(R.drawable.background_point);
relativeLayout.addView(view);
view.setX(x);
view.setY(y);
//Variant 1:
view.animate()
.alpha(0f)
.setDuration(750)
.setInterpolator(new DecelerateInterpolator())
.withLayer()
.setListener(new AnimatorListenerAdapter() {
#Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
relativeLayout.removeView(view);
}
})
.start();
//Variant 2:
/*AlphaAnimation anim1 = new AlphaAnimation(1f, 0f);
anim1.setDuration(750);
//anim1.setFillAfter(true);
anim1.setAnimationListener(new Animation.AnimationListener() {
public void onAnimationStart(Animation anim) {};
public void onAnimationRepeat(Animation anim){};
public void onAnimationEnd(Animation anim) {
relativeLayout.removeView(view);
};
});
view.startAnimation(anim1);*/
//Variant 3:
/*view.setLayerType(View.LAYER_TYPE_HARDWARE, null);
ObjectAnimator animator = ObjectAnimator.ofFloat(view, View.ALPHA, 0f);
// Add a listener that does cleanup
animator.addListener(new AnimatorListenerAdapter() {
#Override
public void onAnimationEnd(Animator animation) {
relativeLayout.removeView(view);
view.setLayerType(View.LAYER_TYPE_NONE, null);
}
});
animator.start();*/
}
But i think, that these are not good solutions.. repeatedly create and remove Views. Better will be effect with one View.
Thank you.
i use this code for animate x and y position for view
the code
v.animate().x(margin).y(0).setDuration(200).start();
how can i call method when this animation finished
i have this code also i can by it call method when finished the animate
but i cant set x and y for View
ValueAnimator varl = ValueAnimator.ofInt(from,to);
varl.setDuration(200);
varl.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator animation) {
}
});
varl.addListener(new AnimatorListenerAdapter()
{
#Override
public void onAnimationEnd(Animator animation)
{
// animate finish call method
}
});
varl.start();
i just thinking about make this code
v.animate().x(margin).y(0).setDuration(200).start();
inside the method onAnimationUpdate
i think its bad idea any another solution
Looks like the base class has a listener.
ObjectAnimator anim = ObjectAnimator.ofFloat(view, "alpha", 0.0f);
anim.addListener(new AnimatorListener() {
...
#Override
public void onAnimationEnd(Animator animation) {
// Do something.
}
...
});
anim.setDuration(300).start();
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) {
}
});
I want to implement zoom feature on an ImageButton by Property Animation. For example, when I click the button, it will zoom out. And when I click it again, it will zoom in.
Here is part of my code:
OnClickListener clickPlayButtonHandler = new OnClickListener() {
#Override
public void onClick(View v) {
final ImageButton clickedButton = (ImageButton) v;
if((Boolean) v.getTag()) {
// zoom out
clickedButton.animate().setInterpolator(new AnticipateInterpolator()).setDuration(500).scaleXBy(-0.4f).scaleYBy(-0.4f).setListener(new Animator.AnimatorListener() {
#Override
public void onAnimationStart(Animator animation) {
clickedButton.setImageResource(R.drawable.bg_pause);
System.out.println(clickedButton.getWidth()); // output the width of the button for checking
}
#Override
public void onAnimationEnd(Animator animation) {
clickedButton.setTag(false);
int d = clickedButton.getWidth();
System.out.println(clickedButton.getWidth());// output the width of the button for checking
}
#Override
public void onAnimationCancel(Animator animation) {}
#Override
public void onAnimationRepeat(Animator animation) { }
});
} else {
// process zoom in
}
}
};
I printed the width of the button before the animation start and the animation finished. However, I found they were the same. I thought when the zoom out animation finished the button width should be small than before. But it didn't.
Could not change view size by ViewPropertyAnimator?
There won't be changes in clickedButton.getWidth(), because the width of a view is not affected by scaling. You can think of getWidth() as a way to get unscaled width of a view. To change the width of a View requires a new measure/layout pass.
ViewPropertyAnimator doesn't change View's width/height or anything that could potentially trigger another layout pass. This is simply because layout passes are expensive and therefore could cause frame skipping, which is the last thing we want see during an Animation.
If you need to get scaled width of the button, you can do getScaleX() * clickedButton.getWidth()
Try the ObjectAnimator:
ObjectAnimator xAnimator =
ObjectAnimator.ofFloat(clickedButton, "scaleX", 1.0f, -0.4f);
ObjectAnimator yAnimator =
ObjectAnimator.ofFloat(clickedButton, "scaleY", 1.0f, -0.4f);
AnimatorSet animatorSet = new AnimatorSet();
animatorSet.setDuration(500);
animatorSet.playTogether(xAnimator, yAnimator);
animatorSet.setInterpolator(new AnticipateInterpolator());
animatorSet.addListener(new Animator.AnimatorListener() {
#Override
public void onAnimationStart(Animator animation) {
clickedButton.setImageResource(R.drawable.bg_pause);
System.out.println(clickedButton.getWidth());
}
#Override
public void onAnimationEnd(Animator animation) {
clickedButton.setTag(false);
int d = clickedButton.getWidth();
System.out.println(clickedButton.getWidth());
}
#Override
public void onAnimationCancel(Animator animation) {
}
#Override
public void onAnimationRepeat(Animator animation) {
}
});
animatorSet.start();
I have several ImageViews in a RelativeLayout.
When the user taps any of the ImageViews, I want the ImageView to be moved to a specified location using a subtle animation.
Eg; I have initially set margins for LayoutParams associated with an ImageView as layoutparams1.setMargins(90,70,0,0); and I have then added it to the layout.
When the ImageView is tapped, I'd like its new location to be 200,200, done with animation.
So, is it possible? if yes, then how?
Note that I have both RelativeLayout and all of its child ImageViews created programmatically.
And I'm new to Android development so an elaborative answer is expected.
TranslateAnimation animation = new TranslateAnimation(0, 50, 0, 100);
animation.setDuration(1000);
animation.setFillAfter(false);
animation.setAnimationListener(new MyAnimationListener());
imageView.startAnimation(animation);
UPDATE :
The problem is that the View is actually still in it's old position. So we have to move it when the animation is finished. To detect when the animation is finished we have to create our own animationListener (inside our activity class):
private class MyAnimationListener implements AnimationListener{
#Override
public void onAnimationEnd(Animation animation) {
imageView.clearAnimation();
LayoutParams lp = new LayoutParams(imageView.getWidth(), imageView.getHeight());
lp.setMargins(50, 100, 0, 0);
imageView.setLayoutParams(lp);
}
#Override
public void onAnimationRepeat(Animation animation) {
}
#Override
public void onAnimationStart(Animation animation) {
}
}
So the onClickEvent will get fired again at it's new place.
The animation will now move it even more down, so you might want to save the x and y in a variable, so that in the onAnimationEnd() you move it not to a fix location.
It is better to use ObjectAnimator which actually moves the ImageView to the new position.
E.g.:
ImageView splash;
#Override
public boolean onTouchEvent(MotionEvent event) {
float tx = event.getX();
float ty = event.getY();
int action = event.getAction();
switch(action) {
case MotionEvent.ACTION_DOWN:
tx = event.getX();
ty = event.getY();
// findViewById(R.id.character).setX(tx-45);
// findViewById(R.id.character).setY(ty-134);
ObjectAnimator animX = ObjectAnimator.ofFloat(splash, "x", tx-45);
ObjectAnimator animY = ObjectAnimator.ofFloat(splash, "y", ty-134);
AnimatorSet animSetXY = new AnimatorSet();
animSetXY.playTogether(animX, animY);
animSetXY.start();
break;
default:
}
return true;
}
you can use this code
imageView.animate().x(80).y(212).setDuration(300);
or
for soft animation you can use this library
https://github.com/wirecube/android_additive_animations
In below code I am adding a image view in center on frame layout dynamically. After add I am increase scaling and set alpha to give zoom effect and after complete animation I am just translate my image view one position to another position.
Add image view on framelayout
imgHeart = new ImageView(getBaseContext());
imgHeart.setId(R.id.heartImage);
imgHeart.setImageResource(R.drawable.material_heart_fill_icon);
imgHeart.setLayoutParams(new FrameLayout.LayoutParams(50, 50, Gravity.CENTER));
mainFrameLaout.addView(imgHeart);
Add animation on image view
imgHeart.animate()
.scaleXBy(6)
.scaleYBy(6)
.setDuration(700)
.alpha(2)
.setListener(new Animator.AnimatorListener() {
#Override
public void onAnimationStart(Animator animation) {
}
#Override
public void onAnimationEnd(Animator animation) {
imgHeart.animate()
.scaleXBy(-6f).scaleYBy(-6f)
.alpha(.1f)
.translationX((heigthAndWidth[0] / 2) - minusWidth)
.translationY(-((heigthAndWidth[1] / 2) - minusHeight))
.setDuration(1000)
.setListener(new Animator.AnimatorListener() {
#Override
public void onAnimationStart(Animator animation) {
}
#Override
public void onAnimationEnd(Animator animation) {
// remove image view from framlayout
}
#Override
public void onAnimationCancel(Animator animation) {
}
#Override
public void onAnimationRepeat(Animator animation) {
}
}).start();
}
#Override
public void onAnimationCancel(Animator animation) {
}
#Override
public void onAnimationRepeat(Animator animation) {
}
}).start();
you can use this code :)
private void animeView(View imageView){
Handler handler = new Handler();
final int[] deltaX = {50};
final int[] deltaRotation = {45};
handler.postDelayed(new Runnable() {
#Override
public void run() {
imageView.animate().translationX(deltaX[0])
.rotation(deltaRotation[0]).setDuration(1000) ;
deltaX[0] *=-1 ;
deltaRotation[0] *=-1 ;
handler.postDelayed(this , 1000);
}
},1000);
}