CODEWITHSUNDEEP
androidanimationscrollviewobjectanimator
Antoine Berger
Antoine Berger

Reputation: 85

Animate horizontal scrollview in android studio

Im trying to animate my horiontal scrollView. At the moment its going from left to right perfectly with:

HorizontalScrollView headband = findViewById(R.id.scroll);
ObjectAnimator.ofInt(headband, "scrollX", 2000).setDuration(10000).start();

Now I want two more things:

Upvotes: 0

Views: 953

Answers (2)

Michael P
Michael P

Reputation: 245

You can use ObjectAnimator's repeatMode to get it to repeat in the opposite direction and repeatCount to get it to continue indefinitely. You can get the scrollable size of your ScrollView by calculating scrollView[0].width - scrollView.width. Here's how it would look in Kotlin with your variables:

ObjectAnimator.ofInt(headband, "scrollX", 0, headband[0].width - headband.width).apply {
    repeatMode = ObjectAnimator.REVERSE
    repeatCount = Animation.INFINITE
    duration = 10000
    start()
}

If you're executing this somewhere where the width of the views is not known yet, like in onCreate(), them wrap it all in headband.doOnLayout { <code> }.

Upvotes: 0

Antoine Berger
Antoine Berger

Reputation: 85

After weeks of struggle here is the solution ! Hope it'll be useful to someone.

        HorizontalScrollView headband = findViewById(R.id.scroll);


        animator1 = ObjectAnimator.ofInt(headband, "scrollX",  1700).setDuration(10000);
        animator2 = ObjectAnimator.ofInt(headband, "scrollX",  0).setDuration(10000);

        animator1.start();
        animator1.addListener(new AnimatorListenerAdapter() {
        @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);
                animator2.start();

            }
        });

        animator2.addListener(new AnimatorListenerAdapter() {
        @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);
                animator1.start();
            }
        });

Upvotes: 1

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