diff --git a/app/src/main/java/com/mxdl/customview/MainActivity.java b/app/src/main/java/com/mxdl/customview/MainActivity.java
index e4c9ed0a59a8050cc6c0337fcb0a2fdfb9cc732e..065f0d41952c31ac6607782aa2c0dbad41772dab 100644
--- a/app/src/main/java/com/mxdl/customview/MainActivity.java
+++ b/app/src/main/java/com/mxdl/customview/MainActivity.java
@@ -47,12 +47,12 @@ public class MainActivity extends AppCompatActivity implements View.OnClickListe
             case R.id.btn_horizontal_scroll_view_ex:
                 startActivity(new Intent(this, HorizontalScrollViewExActivity.class));
                 break;
-            case R.id.btn_sticky_layout:
-                startActivity(new Intent(this, StickyLayoutActivity.class));
-                break;
             case R.id.btn_pinned_header:
                 startActivity(new Intent(this, PinnedHeaderActivity.class));
                 break;
+            case R.id.btn_sticky_layout:
+                startActivity(new Intent(this, StickyLayoutActivity.class));
+                break;
             case R.id.btn_capture_rect:
                 startActivity(new Intent(this, CaptureRectViewActivity.class));
                 break;
diff --git a/app/src/main/java/com/mxdl/customview/refer/HorizontalScrollViewEx.java b/app/src/main/java/com/mxdl/customview/refer/HorizontalScrollViewEx.java
new file mode 100644
index 0000000000000000000000000000000000000000..94ef31e2ae99905cc24aa7b7690eaceafbb3bea0
--- /dev/null
+++ b/app/src/main/java/com/mxdl/customview/refer/HorizontalScrollViewEx.java
@@ -0,0 +1,208 @@
+package com.mxdl.customview.refer;
+
+/**
+ * Description: <HorizontalScrollViewEx><br>
+ * Author:      mxdl<br>
+ * Date:        2019/10/22<br>
+ * Version:     V1.0.0<br>
+ * Update:     <br>
+ */
+import android.content.Context;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.MotionEvent;
+import android.view.VelocityTracker;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Scroller;
+
+public class HorizontalScrollViewEx extends ViewGroup {
+    private static final String TAG = "HorizontalScrollViewEx";
+
+    private int mChildrenSize;
+    private int mChildWidth;
+    private int mChildIndex;
+
+    // 分别记录上次滑动的坐标
+    private int mLastX = 0;
+    private int mLastY = 0;
+    // 分别记录上次滑动的坐标(onInterceptTouchEvent)
+    private int mLastXIntercept = 0;
+    private int mLastYIntercept = 0;
+
+    private Scroller mScroller;
+    private VelocityTracker mVelocityTracker;
+
+    public HorizontalScrollViewEx(Context context) {
+        super(context);
+        init();
+    }
+
+    public HorizontalScrollViewEx(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init();
+    }
+
+    public HorizontalScrollViewEx(Context context, AttributeSet attrs,
+                                  int defStyle) {
+        super(context, attrs, defStyle);
+        init();
+    }
+
+    private void init() {
+        mScroller = new Scroller(getContext());
+        mVelocityTracker = VelocityTracker.obtain();
+    }
+
+    @Override
+    public boolean onInterceptTouchEvent(MotionEvent event) {
+        boolean intercepted = false;
+        int x = (int) event.getX();
+        int y = (int) event.getY();
+
+        switch (event.getAction()) {
+            case MotionEvent.ACTION_DOWN: {
+                intercepted = false;
+                if (!mScroller.isFinished()) {
+                    mScroller.abortAnimation();
+                    intercepted = true;
+                }
+                break;
+            }
+            case MotionEvent.ACTION_MOVE: {
+                int deltaX = x - mLastXIntercept;
+                int deltaY = y - mLastYIntercept;
+                if (Math.abs(deltaX) > Math.abs(deltaY)) {
+                    intercepted = true;
+                } else {
+                    intercepted = false;
+                }
+                break;
+            }
+            case MotionEvent.ACTION_UP: {
+                intercepted = false;
+                break;
+            }
+            default:
+                break;
+        }
+
+        Log.d(TAG, "intercepted=" + intercepted);
+        mLastX = x;
+        mLastY = y;
+        mLastXIntercept = x;
+        mLastYIntercept = y;
+
+        return intercepted;
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        mVelocityTracker.addMovement(event);
+        int x = (int) event.getX();
+        int y = (int) event.getY();
+        switch (event.getAction()) {
+            case MotionEvent.ACTION_DOWN: {
+                if (!mScroller.isFinished()) {
+                    mScroller.abortAnimation();
+                }
+                break;
+            }
+            case MotionEvent.ACTION_MOVE: {
+                int deltaX = x - mLastX;
+                int deltaY = y - mLastY;
+                scrollBy(-deltaX, 0);
+                break;
+            }
+            case MotionEvent.ACTION_UP: {
+                int scrollX = getScrollX();
+                int scrollToChildIndex = scrollX / mChildWidth;
+                mVelocityTracker.computeCurrentVelocity(1000);
+                float xVelocity = mVelocityTracker.getXVelocity();
+                if (Math.abs(xVelocity) >= 50) {
+                    mChildIndex = xVelocity > 0 ? mChildIndex - 1 : mChildIndex + 1;
+                } else {
+                    mChildIndex = (scrollX + mChildWidth / 2) / mChildWidth;
+                }
+                mChildIndex = Math.max(0, Math.min(mChildIndex, mChildrenSize - 1));
+                int dx = mChildIndex * mChildWidth - scrollX;
+                smoothScrollBy(dx, 0);
+                mVelocityTracker.clear();
+                break;
+            }
+            default:
+                break;
+        }
+
+        mLastX = x;
+        mLastY = y;
+        return true;
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        int measuredWidth = 0;
+        int measuredHeight = 0;
+        final int childCount = getChildCount();
+        measureChildren(widthMeasureSpec, heightMeasureSpec);
+
+        int widthSpaceSize = MeasureSpec.getSize(widthMeasureSpec);
+        int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
+        int heightSpaceSize = MeasureSpec.getSize(heightMeasureSpec);
+        int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
+        if (childCount == 0) {
+            setMeasuredDimension(0, 0);
+        } else if (heightSpecMode == MeasureSpec.AT_MOST) {
+            final View childView = getChildAt(0);
+            measuredHeight = childView.getMeasuredHeight();
+            setMeasuredDimension(widthSpaceSize, childView.getMeasuredHeight());
+        } else if (widthSpecMode == MeasureSpec.AT_MOST) {
+            final View childView = getChildAt(0);
+            measuredWidth = childView.getMeasuredWidth() * childCount;
+            setMeasuredDimension(measuredWidth, heightSpaceSize);
+        } else {
+            final View childView = getChildAt(0);
+            measuredWidth = childView.getMeasuredWidth() * childCount;
+            measuredHeight = childView.getMeasuredHeight();
+            setMeasuredDimension(measuredWidth, measuredHeight);
+        }
+    }
+
+    @Override
+    protected void onLayout(boolean changed, int l, int t, int r, int b) {
+        int childLeft = 0;
+        final int childCount = getChildCount();
+        mChildrenSize = childCount;
+
+        for (int i = 0; i < childCount; i++) {
+            final View childView = getChildAt(i);
+            if (childView.getVisibility() != View.GONE) {
+                final int childWidth = childView.getMeasuredWidth();
+                mChildWidth = childWidth;
+                childView.layout(childLeft, 0, childLeft + childWidth,
+                        childView.getMeasuredHeight());
+                childLeft += childWidth;
+            }
+        }
+    }
+
+    private void smoothScrollBy(int dx, int dy) {
+        mScroller.startScroll(getScrollX(), 0, dx, 0, 500);
+        invalidate();
+    }
+
+    @Override
+    public void computeScroll() {
+        if (mScroller.computeScrollOffset()) {
+            scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
+            postInvalidate();
+        }
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        mVelocityTracker.recycle();
+        super.onDetachedFromWindow();
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/mxdl/customview/refer/PinnedHeaderExpandableListView.java b/app/src/main/java/com/mxdl/customview/refer/PinnedHeaderExpandableListView.java
new file mode 100644
index 0000000000000000000000000000000000000000..d38425e24e370a4d09d857938b292da2a9217800
--- /dev/null
+++ b/app/src/main/java/com/mxdl/customview/refer/PinnedHeaderExpandableListView.java
@@ -0,0 +1,256 @@
+package com.mxdl.customview.refer;
+
+/**
+ * Description: <PinnedHeaderExpandableListView><br>
+ * Author:      mxdl<br>
+ * Date:        2019/10/22<br>
+ * Version:     V1.0.0<br>
+ * Update:     <br>
+ */
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Rect;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AbsListView;
+import android.widget.ExpandableListView;
+import android.widget.AbsListView.OnScrollListener;
+
+public class PinnedHeaderExpandableListView extends ExpandableListView implements OnScrollListener {
+    private static final String TAG = "PinnedListView";
+    private static final boolean DEBUG = true;
+
+    public interface OnHeaderUpdateListener {
+        /**
+         * 返回一个view对象即可
+         * 注意：view必须要有LayoutParams
+         */
+        public View getPinnedHeader();
+
+        public void updatePinnedHeader(View headerView, int firstVisibleGroupPos);
+    }
+
+    private View mHeaderView;
+    private int mHeaderWidth;
+    private int mHeaderHeight;
+
+    private View mTouchTarget;
+
+    private OnScrollListener mScrollListener;
+    private OnHeaderUpdateListener mHeaderUpdateListener;
+
+    private boolean mActionDownHappened = false;
+    protected boolean mIsHeaderGroupClickable = true;
+
+
+    public PinnedHeaderExpandableListView(Context context) {
+        super(context);
+        initView();
+    }
+
+    public PinnedHeaderExpandableListView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        initView();
+    }
+
+    public PinnedHeaderExpandableListView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        initView();
+    }
+
+    private void initView() {
+        setFadingEdgeLength(0);
+        setOnScrollListener(this);
+    }
+
+    @Override
+    public void setOnScrollListener(OnScrollListener l) {
+        if (l != this) {
+            mScrollListener = l;
+        } else {
+            mScrollListener = null;
+        }
+        super.setOnScrollListener(this);
+    }
+
+    /**
+     * 给group添加点击事件监听
+     * @param onGroupClickListener 监听
+     * @param isHeaderGroupClickable 表示header是否可点击<br/>
+     * note : 当不想group可点击的时候，需要在OnGroupClickListener#onGroupClick中返回true，
+     * 并将isHeaderGroupClickable设为false即可
+     */
+    public void setOnGroupClickListener(OnGroupClickListener onGroupClickListener, boolean isHeaderGroupClickable) {
+        mIsHeaderGroupClickable = isHeaderGroupClickable;
+        super.setOnGroupClickListener(onGroupClickListener);
+    }
+
+    public void setOnHeaderUpdateListener(OnHeaderUpdateListener listener) {
+        mHeaderUpdateListener = listener;
+        if (listener == null) {
+            mHeaderView = null;
+            mHeaderWidth = mHeaderHeight = 0;
+            return;
+        }
+        mHeaderView = listener.getPinnedHeader();
+        int firstVisiblePos = getFirstVisiblePosition();
+        int firstVisibleGroupPos = getPackedPositionGroup(getExpandableListPosition(firstVisiblePos));
+        listener.updatePinnedHeader(mHeaderView, firstVisibleGroupPos);
+        requestLayout();
+        postInvalidate();
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        if (mHeaderView == null) {
+            return;
+        }
+        measureChild(mHeaderView, widthMeasureSpec, heightMeasureSpec);
+        mHeaderWidth = mHeaderView.getMeasuredWidth();
+        mHeaderHeight = mHeaderView.getMeasuredHeight();
+    }
+
+    @Override
+    protected void onLayout(boolean changed, int l, int t, int r, int b) {
+        super.onLayout(changed, l, t, r, b);
+        if (mHeaderView == null) {
+            return;
+        }
+        int delta = mHeaderView.getTop();
+        mHeaderView.layout(0, delta, mHeaderWidth, mHeaderHeight + delta);
+    }
+
+    @Override
+    protected void dispatchDraw(Canvas canvas) {
+        super.dispatchDraw(canvas);
+        if (mHeaderView != null) {
+            drawChild(canvas, mHeaderView, getDrawingTime());
+        }
+    }
+
+    @Override
+    public boolean dispatchTouchEvent(MotionEvent ev) {
+        int x = (int) ev.getX();
+        int y = (int) ev.getY();
+        int pos = pointToPosition(x, y);
+        if (mHeaderView != null && y >= mHeaderView.getTop() && y <= mHeaderView.getBottom()) {
+            if (ev.getAction() == MotionEvent.ACTION_DOWN) {
+                mTouchTarget = getTouchTarget(mHeaderView, x, y);
+                mActionDownHappened = true;
+            } else if (ev.getAction() == MotionEvent.ACTION_UP) {
+                View touchTarget = getTouchTarget(mHeaderView, x, y);
+                if (touchTarget == mTouchTarget && mTouchTarget.isClickable()) {
+                    mTouchTarget.performClick();
+                    invalidate(new Rect(0, 0, mHeaderWidth, mHeaderHeight));
+                } else if (mIsHeaderGroupClickable){
+                    int groupPosition = getPackedPositionGroup(getExpandableListPosition(pos));
+                    if (groupPosition != INVALID_POSITION && mActionDownHappened) {
+                        if (isGroupExpanded(groupPosition)) {
+                            collapseGroup(groupPosition);
+                        } else {
+                            expandGroup(groupPosition);
+                        }
+                    }
+                }
+                mActionDownHappened = false;
+            }
+            return true;
+        }
+
+        return super.dispatchTouchEvent(ev);
+    }
+
+    private View getTouchTarget(View view, int x, int y) {
+        if (!(view instanceof ViewGroup)) {
+            return view;
+        }
+
+        ViewGroup parent = (ViewGroup)view;
+        int childrenCount = parent.getChildCount();
+        final boolean customOrder = isChildrenDrawingOrderEnabled();
+        View target = null;
+        for (int i = childrenCount - 1; i >= 0; i--) {
+            final int childIndex = customOrder ? getChildDrawingOrder(childrenCount, i) : i;
+            final View child = parent.getChildAt(childIndex);
+            if (isTouchPointInView(child, x, y)) {
+                target = child;
+                break;
+            }
+        }
+        if (target == null) {
+            target = parent;
+        }
+
+        return target;
+    }
+
+    private boolean isTouchPointInView(View view, int x, int y) {
+        if (view.isClickable() && y >= view.getTop() && y <= view.getBottom()
+                && x >= view.getLeft() && x <= view.getRight()) {
+            return true;
+        }
+        return false;
+    }
+
+    public void requestRefreshHeader() {
+        refreshHeader();
+        invalidate(new Rect(0, 0, mHeaderWidth, mHeaderHeight));
+    }
+
+    protected void refreshHeader() {
+        if (mHeaderView == null) {
+            return;
+        }
+        int firstVisiblePos = getFirstVisiblePosition();
+        int pos = firstVisiblePos + 1;
+        int firstVisibleGroupPos = getPackedPositionGroup(getExpandableListPosition(firstVisiblePos));
+        int group = getPackedPositionGroup(getExpandableListPosition(pos));
+        if (DEBUG) {
+            Log.d(TAG, "refreshHeader firstVisibleGroupPos=" + firstVisibleGroupPos);
+        }
+
+        if (group == firstVisibleGroupPos + 1) {
+            View view = getChildAt(1);
+            if (view == null) {
+                Log.w(TAG, "Warning : refreshHeader getChildAt(1)=null");
+                return;
+            }
+            if (view.getTop() <= mHeaderHeight) {
+                int delta = mHeaderHeight - view.getTop();
+                mHeaderView.layout(0, -delta, mHeaderWidth, mHeaderHeight - delta);
+            } else {
+                //TODO : note it, when cause bug, remove it
+                mHeaderView.layout(0, 0, mHeaderWidth, mHeaderHeight);
+            }
+        } else {
+            mHeaderView.layout(0, 0, mHeaderWidth, mHeaderHeight);
+        }
+
+        if (mHeaderUpdateListener != null) {
+            mHeaderUpdateListener.updatePinnedHeader(mHeaderView, firstVisibleGroupPos);
+        }
+    }
+
+    @Override
+    public void onScrollStateChanged(AbsListView view, int scrollState) {
+        if (mScrollListener != null) {
+            mScrollListener.onScrollStateChanged(view, scrollState);
+        }
+    }
+
+    @Override
+    public void onScroll(AbsListView view, int firstVisibleItem,
+                         int visibleItemCount, int totalItemCount) {
+        if (totalItemCount > 0) {
+            refreshHeader();
+        }
+        if (mScrollListener != null) {
+            mScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/mxdl/customview/refer/StickyLayout.java b/app/src/main/java/com/mxdl/customview/refer/StickyLayout.java
new file mode 100644
index 0000000000000000000000000000000000000000..d68cc777d767169b13c5ead2daf1a878ddd81f33
--- /dev/null
+++ b/app/src/main/java/com/mxdl/customview/refer/StickyLayout.java
@@ -0,0 +1,286 @@
+package com.mxdl.customview.refer;
+
+/**
+ * Description: <StickyLayout><br>
+ * Author:      mxdl<br>
+ * Date:        2019/10/22<br>
+ * Version:     V1.0.0<br>
+ * Update:     <br>
+ */
+import java.util.NoSuchElementException;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.os.Build;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewConfiguration;
+import android.widget.LinearLayout;
+
+
+public class StickyLayout extends LinearLayout {
+    private static final String TAG = "StickyLayout";
+    private static final boolean DEBUG = true;
+
+    public interface OnGiveUpTouchEventListener {
+        public boolean giveUpTouchEvent(MotionEvent event);
+    }
+
+    private View mHeader;
+    private View mContent;
+    private OnGiveUpTouchEventListener mGiveUpTouchEventListener;
+
+    // header的高度  单位：px
+    private int mOriginalHeaderHeight;
+    private int mHeaderHeight;
+
+    private int mStatus = STATUS_EXPANDED;
+    public static final int STATUS_EXPANDED = 1;
+    public static final int STATUS_COLLAPSED = 2;
+
+    private int mTouchSlop;
+
+    // 分别记录上次滑动的坐标
+    private int mLastX = 0;
+    private int mLastY = 0;
+
+    // 分别记录上次滑动的坐标(onInterceptTouchEvent)
+    private int mLastXIntercept = 0;
+    private int mLastYIntercept = 0;
+
+    // 用来控制滑动角度，仅当角度a满足如下条件才进行滑动：tan a = deltaX / deltaY > 2
+    private static final int TAN = 2;
+
+    private boolean mIsSticky = true;
+    private boolean mInitDataSucceed = false;
+    private boolean mDisallowInterceptTouchEventOnHeader = true;
+
+    public StickyLayout(Context context) {
+        super(context);
+    }
+
+    public StickyLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
+    public StickyLayout(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    @Override
+    public void onWindowFocusChanged(boolean hasWindowFocus) {
+        super.onWindowFocusChanged(hasWindowFocus);
+        if (hasWindowFocus && (mHeader == null || mContent == null)) {
+            initData();
+        }
+    }
+
+    private void initData() {
+        int headerId= getResources().getIdentifier("sticky_header", "id", getContext().getPackageName());
+        int contentId = getResources().getIdentifier("sticky_content", "id", getContext().getPackageName());
+        if (headerId != 0 && contentId != 0) {
+            mHeader = findViewById(headerId);
+            mContent = findViewById(contentId);
+            mOriginalHeaderHeight = mHeader.getMeasuredHeight();
+            mHeaderHeight = mOriginalHeaderHeight;
+            mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();
+            if (mHeaderHeight > 0) {
+                mInitDataSucceed = true;
+            }
+            if (DEBUG) {
+                Log.d(TAG, "mTouchSlop = " + mTouchSlop + "mHeaderHeight = " + mHeaderHeight);
+            }
+        } else {
+            throw new NoSuchElementException("Did your view with id \"sticky_header\" or \"sticky_content\" exists?");
+        }
+    }
+
+    public void setOnGiveUpTouchEventListener(OnGiveUpTouchEventListener l) {
+        mGiveUpTouchEventListener = l;
+    }
+
+    @Override
+    public boolean onInterceptTouchEvent(MotionEvent event) {
+        int intercepted = 0;
+        int x = (int) event.getX();
+        int y = (int) event.getY();
+
+        switch (event.getAction()) {
+            case MotionEvent.ACTION_DOWN: {
+                mLastXIntercept = x;
+                mLastYIntercept = y;
+                mLastX = x;
+                mLastY = y;
+                intercepted = 0;
+                break;
+            }
+            case MotionEvent.ACTION_MOVE: {
+                int deltaX = x - mLastXIntercept;
+                int deltaY = y - mLastYIntercept;
+                if (mDisallowInterceptTouchEventOnHeader && y <= getHeaderHeight()) {
+                    intercepted = 0;
+                } else if (Math.abs(deltaY) <= Math.abs(deltaX)) {
+                    intercepted = 0;
+                } else if (mStatus == STATUS_EXPANDED && deltaY <= -mTouchSlop) {
+                    intercepted = 1;
+                } else if (mGiveUpTouchEventListener != null) {
+                    if (mGiveUpTouchEventListener.giveUpTouchEvent(event) && deltaY >= mTouchSlop) {
+                        intercepted = 1;
+                    }
+                }
+                break;
+            }
+            case MotionEvent.ACTION_UP: {
+                intercepted = 0;
+                mLastXIntercept = mLastYIntercept = 0;
+                break;
+            }
+            default:
+                break;
+        }
+
+        if (DEBUG) {
+            Log.d(TAG, "intercepted=" + intercepted);
+        }
+        return intercepted != 0 && mIsSticky;
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        if (!mIsSticky) {
+            return true;
+        }
+        int x = (int) event.getX();
+        int y = (int) event.getY();
+        switch (event.getAction()) {
+            case MotionEvent.ACTION_DOWN: {
+                break;
+            }
+            case MotionEvent.ACTION_MOVE: {
+                int deltaX = x - mLastX;
+                int deltaY = y - mLastY;
+                if (DEBUG) {
+                    Log.d(TAG, "mHeaderHeight=" + mHeaderHeight + "  deltaY=" + deltaY + "  mlastY=" + mLastY);
+                }
+                mHeaderHeight += deltaY;
+                setHeaderHeight(mHeaderHeight);
+                break;
+            }
+            case MotionEvent.ACTION_UP: {
+                // 这里做了下判断，当松开手的时候，会自动向两边滑动，具体向哪边滑，要看当前所处的位置
+                int destHeight = 0;
+                if (mHeaderHeight <= mOriginalHeaderHeight * 0.5) {
+                    destHeight = 0;
+                    mStatus = STATUS_COLLAPSED;
+                } else {
+                    destHeight = mOriginalHeaderHeight;
+                    mStatus = STATUS_EXPANDED;
+                }
+                // 慢慢滑向终点
+                this.smoothSetHeaderHeight(mHeaderHeight, destHeight, 500);
+                break;
+            }
+            default:
+                break;
+        }
+        mLastX = x;
+        mLastY = y;
+        return true;
+    }
+
+    public void smoothSetHeaderHeight(final int from, final int to, long duration) {
+        smoothSetHeaderHeight(from, to, duration, false);
+    }
+
+    public void smoothSetHeaderHeight(final int from, final int to, long duration, final boolean modifyOriginalHeaderHeight) {
+        final int frameCount = (int) (duration / 1000f * 30) + 1;
+        final float partation = (to - from) / (float) frameCount;
+        new Thread("Thread#smoothSetHeaderHeight") {
+
+            @Override
+            public void run() {
+                for (int i = 0; i < frameCount; i++) {
+                    final int height;
+                    if (i == frameCount - 1) {
+                        height = to;
+                    } else {
+                        height = (int) (from + partation * i);
+                    }
+                    post(new Runnable() {
+                        public void run() {
+                            setHeaderHeight(height);
+                        }
+                    });
+                    try {
+                        sleep(10);
+                    } catch (InterruptedException e) {
+                        e.printStackTrace();
+                    }
+                }
+
+                if (modifyOriginalHeaderHeight) {
+                    setOriginalHeaderHeight(to);
+                }
+            };
+
+        }.start();
+    }
+
+    public void setOriginalHeaderHeight(int originalHeaderHeight) {
+        mOriginalHeaderHeight = originalHeaderHeight;
+    }
+
+    public void setHeaderHeight(int height, boolean modifyOriginalHeaderHeight) {
+        if (modifyOriginalHeaderHeight) {
+            setOriginalHeaderHeight(height);
+        }
+        setHeaderHeight(height);
+    }
+
+    public void setHeaderHeight(int height) {
+        if (!mInitDataSucceed) {
+            initData();
+        }
+
+        if (DEBUG) {
+            Log.d(TAG, "setHeaderHeight height=" + height);
+        }
+        if (height <= 0) {
+            height = 0;
+        } else if (height > mOriginalHeaderHeight) {
+            height = mOriginalHeaderHeight;
+        }
+
+        if (height == 0) {
+            mStatus = STATUS_COLLAPSED;
+        } else {
+            mStatus = STATUS_EXPANDED;
+        }
+
+        if (mHeader != null && mHeader.getLayoutParams() != null) {
+            mHeader.getLayoutParams().height = height;
+            mHeader.requestLayout();
+            mHeaderHeight = height;
+        } else {
+            if (DEBUG) {
+                Log.e(TAG, "null LayoutParams when setHeaderHeight");
+            }
+        }
+    }
+
+    public int getHeaderHeight() {
+        return mHeaderHeight;
+    }
+
+    public void setSticky(boolean isSticky) {
+        mIsSticky = isSticky;
+    }
+
+    public void requestDisallowInterceptTouchEventOnHeader(boolean disallowIntercept) {
+        mDisallowInterceptTouchEventOnHeader = disallowIntercept;
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/mxdl/customview/view/HorizontalScrollViewEx.java b/app/src/main/java/com/mxdl/customview/view/HorizontalScrollViewEx.java
index 0bf58e61d9ba4b9c017870b34200de7ce7d0c710..620f9f5c433a980fd3ad09205a839576dde93cd8 100644
--- a/app/src/main/java/com/mxdl/customview/view/HorizontalScrollViewEx.java
+++ b/app/src/main/java/com/mxdl/customview/view/HorizontalScrollViewEx.java
@@ -35,9 +35,10 @@ import android.widget.Scroller;
  *     4.对速度检测器没有添加事件，知道获取的速度一直是0
  *     5.computeScroll()方法里面没有postinvlate
  *     6.对于正在滑动中再次进行滑动没有做优化
+ *     7.Math.abs(dx) >= Math.abs(dy) 加上等于会导致0,0的情况也被拦截，上滑，下滑会翻页
  */
 public class HorizontalScrollViewEx extends ViewGroup {
-
+    public static final String TAG = HorizontalScrollViewEx.class.getSimpleName();
     private Scroller mScroller;
     private VelocityTracker mVelocityTracker;
     private int mLastX;
@@ -127,11 +128,12 @@ public class HorizontalScrollViewEx extends ViewGroup {
             case MotionEvent.ACTION_MOVE:
                 int dx = x - mLastInterceptX;
                 int dy = y - mLastInterceptY;
-                if (Math.abs(dx) >= Math.abs(dy)) {
+                if (Math.abs(dx) > Math.abs(dy)) {
                     intercept = true;
                 } else {
                     intercept = false;
                 }
+                Log.v(TAG,"dx:"+dx+";dy:"+dy+"intercept:"+intercept);
                 break;
             case MotionEvent.ACTION_UP:
                 intercept = false;