Develop Reference

Performing a view animation after adding the view

So my problem is that i want after double click on item in RecyclerView adapter to trigger the animation on ImageView. I detect the double tap in adapter, take the coordinates of the tapped area in format of int[] location, call the method in Fragment passing the location.
public void performAnimation(int[] location) {
ImageView imageView = new ImageView(getContext());
imageView.setImageDrawable(getActivity().getDrawable(R.drawable.ic_imageview));
ConstraintLayout.LayoutParams params =
new ConstraintLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
params.setMargins(0, location[0], 0, location[1]);
imageView.setLayoutParams(params);
parentViewGroup2.addView(imageView);
ObjectAnimator translateAnim = ObjectAnimator.ofFloat(imageView, View.TRANSLATION_Y, 0.5f);
translateAnim.setDuration(2000);
translateAnim.start();
So the problem is that i only get to draw the image in layout, but animation wont start. I have also tryed that with TransitionManager with beginDelayedTransition, but again, nothing. Does anyone have any idea what am i doing wrong? Thanks in advance.

ObjectAnimator.ofFloat receives an array of float values of which value the animation will run through, you only pass 1 0.5f param which is not enough. Also, the float here should be an absolute pixel on the screen will be translated, not an offset value.
Try this ViewPropertyAnimator instead:
imageView.animate().translationY(400).setDuration(200).start();

Move a view from one view to another

I have to move from x to y point. There are 10 views horizontal.I want to move a imageView to move from x view to the y view.
TranslateAnimation animation = new TranslateAnimation(0, viewTwo.getX()-viewOne.getX(),0 , viewTwo.getY()-viewOne.getY());
animation.setRepeatMode(0);
animation.setDuration(3000);
animation.setFillAfter(true);
viewOne.startAnimation(animation);
but viewTwo.getX() and viewOne.getX() returns 0.0.

Try to look up measure() method to get X position value !
Like, measure the view until Y position, the view-width on the left of Y position would be the result what you wanted.

How to move a view to another view using animation in Android?

I have a circle at the center of the screen inside which there's an ImageView + TextView. I have another two ImageView+TextView, one at the top and another at bottom of the screen.
My requirement is :
I want a copy of the top ImageView+TextView and a copy of the bottom ImageView+TextView to move in animation into the center of the circle, thereby changing the value of the textView inside the circle.
For example:
Say top textView has value 200 and bottom textview has value 300. I want a portion of those values (say 100 or 150) to animate and move into the circle, but the original values 200 and 300 should remain on the same position.
I've tried using TranslateAnimation. However I face issues finding the x and y coordinates of the center circle. It is not exactly going to the center of the circle. Also original view's position is not retained.
TranslateAnimation animation = new
TranslateAnimation(startLayout.getX(),endLayout.getX(),
startLayout.getY(),endLayout.getY);
animation.setDuration(1000);
animation.setFillAfter(false);
startView.startAnimation(animation);
startLayout is the linearlayout in which ImageView and TextView reside.
Please help! Thanks!

I had the same issue and I fixed by using the next code (sorry is in Kotlin, but works the same in Java).Let's say viewFirst wants to reach viewTwo position:
(DON'T USE):
viewFirst.animate()
.translationX(viewSecond.x)
.translationY(viewSecond.y)
.setDuration(1000)
.withEndAction {
//to make sure that it arrives,
//but not needed actually these two lines
viewFirst.x = viewSecond.x
viewFirst.y = viewSecond.y
}
.start()
(USE THIS SOLUTION):
viewFirst.animate()
.x(viewSecond.x)
.y(viewSecond.y)
.setDuration(1000)
.withEndAction {
//to make sure that it arrives,
//but not needed actually these two lines
viewFirst.x = viewSecond.x
viewFirst.y = viewSecond.y
}
.start()

Using the getX() and getY() methods define the position of the view in pixels, but the constructor you use defines Float type values that must be values from 0.0f to 1.0f
TranslateAnimation(float fromXDelta, float toXDelta, float fromYDelta, float toYDelta)
This is another option using the view`s position in pixels:
viewFirst.animate()
.x(viewSecond.getX())
.y(viewSecond.getY())
.setDuration(1000).withEndAction(new Runnable() {
#Override
public void run() {
viewFirst.setX(tv2.getX());
viewFirst.setY(tv2.getY());
}
}).start();

Try this for accurate coordinates
private fun moveView(viewToBeMoved: View, targetView: View) {
val targetX: Float =
targetView.x + targetView.width / 2 - viewToBeMoved.width / 2
val targetY: Float =
targetView.y + targetView.height / 2 - viewToBeMoved.height / 2
viewToBeMoved.animate()
.x(targetX)
.y(targetY)
.setDuration(2000)
.withEndAction {
targetView.visibility = View.GONE
}
.start()
}

How to move a rotated view in the right direction on Android?

I have a View I rotate programmatically by a random degree with
view.setRotation(rnd.nextInt(181));
How can I now move the view in the direction of the rotation? If I use
view.animate().translationXBy...
the view will move to the left or right. Is there a way to combine translationX and translationY to have the view move exactly in the direction of the rotation? Or any other way to achieve this?

Ok, I found the solution myself with Pythagoras:
float rotation = view.getRotation();
float translationX = (float)(Math.cos(Math.toRadians(rotation)) * distance);
float translationY = (float)(Math.sin(Math.toRadians(rotation)) * distance);
view.animate().translationXBy(translationX).translationYBy(translationY)

Use tween animation set of rotate and translate animation by method of view setAnimation()
for example:
RotateAnimation animation=new RotateAnimation(0, 360);
animation.setRepeatCount(-1);
animation.setRepeatMode(Animation.RESTART);
textView.setAnimation(animation);
animation.start();

Simultaneously scale and translate ImageView based on Target

What I want to do is simultaneously scale and translate an ImageView based when the user touches is. The final position and size of the ImageView should be equal to the target.
Below is a snipper of the OnClickListener attached to every ImageView that should perform this action. The new position and size is obtained from ivYou, which also is an ImageView.
#Override
public void onClick(View v) {
// Create animations
int[] from = new int[2];
int[] to = new int[2];
//v.getLocationInWindow(from);
v.getLocationOnScreen(from);
//ivYou.getLocationInWindow(to);
ivYou.getLocationOnScreen(to);
TranslateAnimation transAnim = new TranslateAnimation(0, to[0] - from[0], 0, to[1] - from[0]);
float factorX = ivYou.getWidth() / v.getWidth();
float factorY = ivYou.getHeight() / v.getHeight();
ScaleAnimation scaleAnim = new ScaleAnimation(1.0f, factorX, 1.0f, factorY);
// Create animation set
AnimationSet set = new AnimationSet(true);
set.setFillAfter(true);
set.setDuration(ANIM_DURATION);
set.addAnimation(transAnim);
set.addAnimation(scaleAnim);
// Start animations and disable click listener
v.startAnimation(set);
v.setOnClickListener(null);
}
ANIM_DURATION is 2000 miliseconds.
When I run this code the strangest things happen. The ImageView turns half a circle and gets smaller then its supposed to be. When I do not add the ScaleAnimator to the animation set, then the ImageView is moved to the new position. However, this new position isn't the same for every ImageView. Note that the ImageView's with this OnClickListener all have a different initial position.
Any help and feedback is greatly appreciated!

I was able to achieve this animation by wrapping the target View in a layout group and animating them separately.
In other words, I translate the wrapper layout, and scale the child view. Translating and scaling the same view at the same time always seems to result in unexpected animation trajectories as the scaling messes with the coordinate system the translate animation is using.
translateTarget.animate().x(deltaX).y(deltaY).setDuration(1000);
scaleTarget.animate().scaleX(0.01f).scaleY(0.01f).setDuration(1000)

Did you try this constructor?
ScaleAnimation (float fromX, float toX, float fromY, float toY, float pivotX, float pivotY) and have pivotX be widthofimageview/2 and pivotY be the heightofimageview/2 for it to be the center. This is what I used in my translate scale animation.