diff --git a/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java b/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java
index 7a33faf..b299fb5 100644
--- a/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java
+++ b/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java
@@ -271,6 +271,8 @@ public static interface SwipeListener {
          */
         public void onScrollStateChange(int state, float scrollPercent);
 
+        public void onScrollLeftChange(int left);
+
         /**
          * Invoke when edge touched
          *
@@ -511,6 +513,10 @@ public int getViewVerticalDragRange(View child) {
 
         @Override
         public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) {
+
+            for (SwipeListener listener : mListeners) {
+                listener.onScrollLeftChange(left);
+            }
             super.onViewPositionChanged(changedView, left, top, dx, dy);
             if ((mTrackingEdge & EDGE_LEFT) != 0) {
                 mScrollPercent = Math.abs((float) left
diff --git a/library/src/main/java/me/imid/swipebacklayout/lib/app/SwipeBackActivityHelper.java b/library/src/main/java/me/imid/swipebacklayout/lib/app/SwipeBackActivityHelper.java
index 63dd71b..a27c350 100644
--- a/library/src/main/java/me/imid/swipebacklayout/lib/app/SwipeBackActivityHelper.java
+++ b/library/src/main/java/me/imid/swipebacklayout/lib/app/SwipeBackActivityHelper.java
@@ -32,6 +32,10 @@ public void onActivityCreate() {
             public void onScrollStateChange(int state, float scrollPercent) {
             }
 
+            @Override
+            public void onScrollLeftChange(int left) {
+            }
+
             @Override
             public void onEdgeTouch(int edgeFlag) {
                 Utils.convertActivityToTranslucent(mActivity);