RecyclerView that passes touch interactions to child ScrollViews based on the ScrollView's content

TouchDelegatingRecyclerView.java

public class TouchDelegatingRecyclerView extends RecyclerView {

    private static final String TAG = TouchDelegatingRecyclerView.class.getSimpleName();

    private static final int UP_SWIPE = 803;
    private static final int DOWN_SWIPE = UP_SWIPE + 1;

    private float originalY = 0;

    private int swipeDirection = 0;

    private boolean isIntercepting = false;

    public DozingRecyclerView(Context context) {
        super(context);
    }

    public DozingRecyclerView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

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

    @Override
    public boolean onInterceptTouchEvent(MotionEvent e) {

        final int childCount = getChildCount();
        final float x = e.getX();
        final float y = e.getY();

        switch (e.getAction()) {
            case MotionEvent.ACTION_DOWN:
                originalY = y;
                break;
            case MotionEvent.ACTION_MOVE:
                if (y < originalY) {
                    swipeDirection = UP_SWIPE;
                } else if (y > originalY) {
                    swipeDirection = DOWN_SWIPE;
                }
                break;
        }

        for (int i = 0; i<childCount; i++) {
            View child = getChildAt(i);
            
            if (x > child.getLeft() && x < child.getRight() && y > child.getTop() && y < child.getBottom()) {
            
                final TouchDelegatingViewHolder holder = ((TouchDelegatingViewHolder)getChildViewHolder(child));
                final TouchDelegatingScrollView scrollView = holder.scrollView;

                int status = scrollView.getStatus();

                if ((status != TouchDelegatingScrollView.TOP_AND_BOTTOM)
                        && ((status != TouchDelegatingScrollView.BOTTOM && swipeDirection == UP_SWIPE)
                        || ((status != TouchDelegatingScrollView.TOP && swipeDirection == DOWN_SWIPE)))) {
                    isIntercepting = true;
                    return false;
              }
            }
        }
        isIntercepting = false;
        return super.onInterceptTouchEvent(e);
    }

    @Override
    public boolean onTouchEvent(MotionEvent e) {
        return !isIntercepting && super.onTouchEvent(e);
    }
}

TouchDelegatingScrollView.java

public class TouchDelegatingScrollView extends ScrollView {

    private static final String TAG = TouchDelefatingScrollView.class.getSimpleName();

    public static final int TOP = 235;
    public static final int BOTTOM = TOP + 1;
    public static final int NOWHERE = TOP + 2;
    public static final int TOP_AND_BOTTOM = TOP + 3;

    private int status = TOP;

    public LimitNotifyingScrollView(Context context) {
        super(context);
    }

    public LimitNotifyingScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public LimitNotifyingScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public LimitNotifyingScrollView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        View child = getChildAt(0);
        measureChildWithMargins(child, widthMeasureSpec, 0, heightMeasureSpec, 0);

        int childHeight = child.getMeasuredHeight();

        int parentHeight = MeasureSpec.getSize(heightMeasureSpec);

        status = (childHeight < parentHeight) ? TOP_AND_BOTTOM : TOP;
        
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }



    @Override
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {

        View bottomView = getChildAt(getChildCount()-1);

        final int bottom = (bottomView.getBottom()-(getHeight() + getScrollY() + bottomView.getTop()));

        if (bottom <= 0 && t == 0) {
            status = TOP_AND_BOTTOM;
        } else if (bottom <= 0) {
            status = BOTTOM;
        } else if (t == 0) {
            status = TOP;
        } else {
            status = NOWHERE;
        }

        super.onScrollChanged(l, t, oldl, oldt);
    }

    public int getStatus() {
        return status;
    }
}