ViewPager animation fade in/out instead of slide

This should work better for the fade in/out transform:

public void transformPage(View view, float position) {
    view.setTranslationX(view.getWidth() * -position);
       
    if(position <= -1.0F || position >= 1.0F) {
        view.setAlpha(0.0F);
    } else if( position == 0.0F ) {
        view.setAlpha(1.0F);
    } else { 
        // position is between -1.0F & 0.0F OR 0.0F & 1.0F
        view.setAlpha(1.0F - Math.abs(position));
    }
}

Based on a @murena's answer, this should work better for the fade in/out transform. At the end of animation the position is restored to default value.

public void transformPage(View view, float position) {
    if(position <= -1.0F || position >= 1.0F) {
        view.setTranslationX(view.getWidth() * position);
        view.setAlpha(0.0F);
    } else if( position == 0.0F ) {
        view.setTranslationX(view.getWidth() * position);
        view.setAlpha(1.0F);
    } else { 
        // position is between -1.0F & 0.0F OR 0.0F & 1.0F
        view.setTranslationX(view.getWidth() * -position);
        view.setAlpha(1.0F - Math.abs(position));
    }
}
  

Fade according to Google: https://developer.android.com/training/animation/reveal-or-hide-view

viewPager.setPageTransformer(false, new ViewPager.PageTransformer() {
    @Override
    public void transformPage(@NonNull View page, float position) {
        page.setAlpha(0f);
        page.setVisibility(View.VISIBLE);

        // Start Animation for a short period of time
        page.animate()
            .alpha(1f)
            .setDuration(page.getResources().getInteger(android.R.integer.config_shortAnimTime));
    }
});