add animation listener

[KhalidElSayed]

When I create an animation using actor like the following:

new Actor.Builder(SpringSystem.create(), rootView.findViewById(R.id.circle)) .addTranslateMotion(Imitator.TRACK_DELTA, Imitator.FOLLOW_EXACT, MotionProperty.X).build();

I want to add a listener to control the behavior of the animation itself or to track the user actions, ex. when the user touch the view down, up or start moving it.

Note: I want to use this animation to create "Slide to Cancel" function. how can I achieve this function using the above animation.

[ericleong]

You can track the user actions by adding a View.OnTouchListener:

new Actor.Builder(SpringSystem.create(), rootView.findViewById(R.id.circle))
		.addTranslateMotion(Imitator.TRACK_DELTA, Imitator.FOLLOW_EXACT, MotionProperty.X)
		.onTouchListener(new View.OnTouchListener() {
			@Override
			public boolean onTouch(View v, MotionEvent event) {
				// custom behavior
				return true;
			}
		})

But if you want to actually add new behavior to the animation, you can do something like this:, which will fade the view as the user moves it:

final View circle = rootView.findViewById(R.id.circle);
SpringSystem springSystem = SpringSystem.create();

new Actor.Builder(springSystem, rootView.findViewById(R.id.circle))
		.addMotion(springSystem.createSpring(), Imitator.TRACK_DELTA, Imitator.FOLLOW_EXACT,
				0, MotionProperty.X, new SimpleSpringListener() {
					@Override
					public void onSpringUpdate(Spring spring) {
						circle.setAlpha(
								1 - 2 * Math.abs((float) spring.getCurrentValue())
										/ rootView.getMeasuredWidth());
					}
				})
		.build();

But if you're looking to control the animation, that may get a little complicated since the spring will animate on its own, so you will need to decide whether or not to use the spring's value or your own custom value.

[Bharathbol]

That's program Errors create your

[Bharathbol]

Actor walk = new Actor.Builder(SpringSystem.create(), walker)
.addMotion(
new MotionImitator(MotionProperty.X),
new Performer(View.TRANSLATION_X))
.build();

[metin39]

rootView.findViewById(R.id.circle))