diff --git a/library/src/main/java/com/cpiz/android/bubbleview/BubblePopupWindow.java b/library/src/main/java/com/cpiz/android/bubbleview/BubblePopupWindow.java
index 15510b4..6da7afc 100644
--- a/library/src/main/java/com/cpiz/android/bubbleview/BubblePopupWindow.java
+++ b/library/src/main/java/com/cpiz/android/bubbleview/BubblePopupWindow.java
@@ -176,8 +176,8 @@ public void showArrowTo(View anchor, ArrowDirection direction, int margin) {
     public void showArrowTo(View anchor, RelativePos relativePos, int marginH, int marginV) {
         dismiss();
 
-        final int screenWidth = Resources.getSystem().getDisplayMetrics().widthPixels;
-        final int screenHeight = Resources.getSystem().getDisplayMetrics().heightPixels;
+        final int screenWidth = anchor.getResources().getDisplayMetrics().widthPixels;
+        final int screenHeight = anchor.getResources().getDisplayMetrics().heightPixels;
         final int navigationBarHeight = getNavigationBarHeightDelta(anchor);
         final Rect anchorRect = getRectInWindow(anchor);
 
diff --git a/library/src/main/java/com/cpiz/android/bubbleview/Utils.java b/library/src/main/java/com/cpiz/android/bubbleview/Utils.java
index cd57261..b6f2268 100644
--- a/library/src/main/java/com/cpiz/android/bubbleview/Utils.java
+++ b/library/src/main/java/com/cpiz/android/bubbleview/Utils.java
@@ -50,6 +50,10 @@ public static int dp2px(int dp) {
     public static int getNavigationBarHeight(View view) {
         Activity activity = getActivity(view);
         if (activity != null) {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N && activity.isInMultiWindowMode()) {
+                // 小窗展示时没有NavigationBar，直接返回0
+                return 0;
+            }
             // 方法一
             {
                 Display display = activity.getWindowManager().getDefaultDisplay();