how to set the spacing in the middle item?

[erylljoy24]

where do i need to set the spacing between the center item?

[onka13]

check the below code and change scale and translate parameters. Or you can change in layout with margin or padding.

        layoutManager.setPostLayoutListener(new CarouselZoomPostLayoutListener() {
            @Override
            public ItemTransformation transformChild(@NonNull View child, float itemPositionToCenterDiff, int orientation) {
                float scale = (float) (2 * (2 * -StrictMath.atan(Math.abs(itemPositionToCenterDiff) + 1.0) / Math.PI + 1));
                float translateY;
                float translateX;
                if (CarouselLayoutManager.VERTICAL == orientation) {
                    final float translateYGeneral = child.getMeasuredHeight() * (1 - scale) * 2 * 1.15f;
                    translateY = Math.signum(itemPositionToCenterDiff) * translateYGeneral;
                    translateX = 0;
                } else {
                    final float translateXGeneral = child.getMeasuredWidth() * (1 - scale) * 2 * 1.15f;
                    translateX = Math.signum(itemPositionToCenterDiff) * translateXGeneral;
                    translateY = 0;
                }
                //CommonHelper.log("itemPositionToCenterDiff: " + itemPositionToCenterDiff + ", scale: " + scale + ", x: " + translateX + ",y: " + translateY);
                scale = 1;
                if (-0.5 < itemPositionToCenterDiff && itemPositionToCenterDiff < 0.5) {
                    child.setAlpha(1f);
                } else {
                    child.setAlpha(0.5f);
                }
                return new ItemTransformation(scale, scale, translateX, translateY);
            }
        });

[erylljoy24]

thank you for this block of code @onka13 and now my problem is when ever i scroll the items the image at the center is a bit jumpy/jerky.

[onka13]

@erylljoy24 could you please share your code. (PostLayoutListener)

[erylljoy24]

@onka13 i used this block of code

`public ItemTransformation transformChild(@nonnull View child, float itemPositionToCenterDiff, int orientation) {
final float scale = (float) (2 * (2 * -StrictMath.atan(Math.abs(itemPositionToCenterDiff) + 1.20) / Math.PI + 1));

    final float translateY;
    final float translateX;
    if (CarouselLayoutManager.VERTICAL == orientation) {
        final float translateYGeneral = child.getMeasuredHeight() * (1 - scale) * 2 * .50f;
        translateY = Math.signum(itemPositionToCenterDiff) * translateYGeneral;
        translateX = 0;
    } else {// 0.60

        final float translateXGeneral = (float) ((0 - scale) * .20 * .50f);
        translateX = Math.signum(itemPositionToCenterDiff) * translateXGeneral;
        translateY = 0;
    }

    return new ItemTransformation(scale, scale, translateX, translateY);
    
}`

i don't know why it caused a jumpy scroll

[sagarhudge]

@erylljoy24 same issue i'm facing please help if you have solution