A RecyclerView that make the first ViewHolder has parallax effect.

attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="ParallaxRecyclerView">
        <attr name="parallaxMultiplier" format="float"/>
    </declare-styleable>
</resources>

ParallaxRecyclerView.java

/**
 * Make the first {@link RecyclerView.ViewHolder} has parallax effect.
 */
public class ParallaxRecyclerView extends ECRecyclerView {
    private static final String TAG = ParallaxRecyclerView.class.getSimpleName();

    private static final float DEFAULT_PARALLAX_MULTIPLIER = 0.5f;

    private float mParallaxMultiplier = DEFAULT_PARALLAX_MULTIPLIER;
    private OnParallaxScrollListener mParallaxScrollListener;
    private int mPreviousVerticalScrollOffset;

    public ParallaxRecyclerView(Context context) {
        this(context, null);
    }

    public ParallaxRecyclerView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public ParallaxRecyclerView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init(context, attrs, defStyle);
    }

    private void init(Context context, AttributeSet attrs, int defStyle) {
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.ParallaxRecyclerView, defStyle, 0);
        mParallaxMultiplier = typedArray.getFloat(R.styleable.ParallaxRecyclerView_parallaxMultiplier, DEFAULT_PARALLAX_MULTIPLIER);
        typedArray.recycle();

        addOnScrollListener(new OnScrollListener() {

            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                int verticalScrollOffset = recyclerView.computeVerticalScrollOffset();
                if (verticalScrollOffset != mPreviousVerticalScrollOffset) {
                    mPreviousVerticalScrollOffset = verticalScrollOffset;

                    RecyclerView.ViewHolder viewHolder = recyclerView.findViewHolderForAdapterPosition(0);
                    if (viewHolder != null && viewHolder.itemView != null && mParallaxMultiplier != 0.0f) {
                        View view = viewHolder.itemView;

                        view.setTranslationY(verticalScrollOffset * mParallaxMultiplier);

                        if (mParallaxScrollListener != null) {
                            int viewHeight = view.getMeasuredHeight();
                            mParallaxScrollListener.onParallaxChange(viewHeight, verticalScrollOffset);
                        }
                    }
                }
            }
        });
    }

    public void setPrallaxMultiplier(float parallaxMultiplier) {
        mParallaxMultiplier = parallaxMultiplier;
    }

    public float getParallaxMultiplier() {
        return mParallaxMultiplier;
    }

    public void setParallaxScrollListener(OnParallaxScrollListener listener) {
        mParallaxScrollListener = listener;
    }

    public interface OnParallaxScrollListener {

        void onParallaxChange(int viewHeight, int scrollOffset);
    }
}