List Scaled Center Item

CenterZoomLayoutManager.java

java```
public class CenterZoomLayoutManager extends LinearLayoutManager { private final float mShrinkAmount = 0.15f; private final float mShrinkDistance = 0.9f; public CenterZoomLayoutManager(Context context) { super(context); } public CenterZoomLayoutManager(Context context, int orientation, boolean reverseLayout) { super(context, orientation, reverseLayout); } @Override public int scrollVerticallyBy(int dy, RecyclerView.Recycler recycler, RecyclerView.State state) { int orientation = getOrientation(); if (orientation == VERTICAL) { int scrolled = super.scrollVerticallyBy(dy, recycler, state); float midpoint = getHeight() / 2.f; float d0 = 0.f; float d1 = mShrinkDistance * midpoint; float s0 = 1.f; float s1 = 1.f - mShrinkAmount; for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); float childMidpoint = (getDecoratedBottom(child) + getDecoratedTop(child)) / 2.f; float d = Math.min(d1, Math.abs(midpoint - childMidpoint)); float scale = s0 + (s1 - s0) * (d - d0) / (d1 - d0); child.setScaleX(scale); child.setScaleY(scale); } return scrolled; } else { return 0; } } @Override public int scrollHorizontallyBy(int dx, RecyclerView.Recycler recycler, RecyclerView.State state) { int orientation = getOrientation(); if (orientation == HORIZONTAL) { int scrolled = super.scrollHorizontallyBy(dx, recycler, state); float midpoint = getWidth() / 2.f; float d0 = 0.f; float d1 = mShrinkDistance * midpoint; float s0 = 1.f; float s1 = 1.f - mShrinkAmount; for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); float childMidpoint = (getDecoratedRight(child) + getDecoratedLeft(child)) / 2.f; float d = Math.min(d1, Math.abs(midpoint - childMidpoint)); float scale = s0 + (s1 - s0) * (d - d0) / (d1 - d0); child.setScaleX(scale); child.setScaleY(scale); } return scrolled; } else { return 0; } } }
```