/**
* Creates an animator that can be used for x and/or y translations. When interrupted, it sets a
* tag to keep track of the position so that it may be continued from position.
*
* @param view The view being moved. This may be in the overlay for onDisappear.
* @param values The values containing the view in the view hierarchy.
* @param viewPosX The x screen coordinate of view
* @param startX The start translation x of view
* @param endX The end translation x of view
* @param interpolator The interpolator to use with this animator.
* @return An animator that moves from (startX, startY) to (endX, endY) unless there was a
* previous interruption, in which case it moves from the current position to (endX, endY).
*/
static Animator createAnimation(
View view,
TransitionValues values,
int viewPosX,
float startX,
float endX,
TimeInterpolator interpolator,
Transition transition) {
float terminalX = view.getTranslationX();
Integer startPosition = (Integer) values.view.getTag(R.id.transitionPosition);
if (startPosition != null) {
startX = startPosition - viewPosX + terminalX;
}
// Initial position is at translation startX, startY, so position is offset by that
// amount
int startPosX = viewPosX + Math.round(startX - terminalX);
view.setTranslationX(startX);
if (startX == endX) {
return null;
}
Path path = new Path();
path.moveTo(startX, 0);
path.lineTo(endX, 0);
ObjectAnimator anim =
ObjectAnimator.ofFloat(view, View.TRANSLATION_X, View.TRANSLATION_Y, path);
TransitionPositionListener listener =
new TransitionPositionListener(view, values.view, startPosX, terminalX);
transition.addListener(listener);
anim.addListener(listener);
anim.addPauseListener(listener);
anim.setInterpolator(interpolator);
return anim;
}
