diff --git a/corelibrary/src/main/java/com/dalimao/corelibrary/VerificationCodeInput.java b/corelibrary/src/main/java/com/dalimao/corelibrary/VerificationCodeInput.java
index ec24b89..27896ca 100644
--- a/corelibrary/src/main/java/com/dalimao/corelibrary/VerificationCodeInput.java
+++ b/corelibrary/src/main/java/com/dalimao/corelibrary/VerificationCodeInput.java
@@ -82,6 +82,8 @@ public class VerificationCodeInput extends ViewGroup {
 
     }
 
+
+
     private void initViews() {
         TextWatcher textWatcher = new TextWatcher() {
             @Override
@@ -241,7 +243,7 @@ public class VerificationCodeInput extends ViewGroup {
     @Override
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
-        int parentWidth = getLayoutParams().width;
+        int parentWidth = getMeasuredWidth();
         if (parentWidth == LayoutParams.MATCH_PARENT) {
             parentWidth = getScreenWidth();
         }
diff --git a/simple/src/main/res/layout/activity_main.xml b/simple/src/main/res/layout/activity_main.xml
index 2b9cafa..a33ce06 100644
--- a/simple/src/main/res/layout/activity_main.xml
+++ b/simple/src/main/res/layout/activity_main.xml
@@ -11,7 +11,7 @@
     tools:context="com.dalimao.verificationcodeinput.MainActivity">
 
    <ScrollView
-       android:layout_width="match_parent"
+       android:layout_width="600px"
        android:layout_height="wrap_content">
     <LinearLayout
         android:layout_width="match_parent"
@@ -39,10 +39,10 @@
          android:padding="12dp"
          />
      <com.dalimao.corelibrary.VerificationCodeInput
-         android:layout_width="800px"
+         android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:background="@color/colorAccent"
-         ver:box="4"
+         ver:box="3"
          ver:box_bg_normal="@drawable/verification_edit_bg_normal"
          ver:box_bg_focus="@drawable/verification_edit_bg_focus"
          ver:child_h_padding="5dp"
diff --git a/simple/src/main/res/values/dimens.xml b/simple/src/main/res/values/dimens.xml
index 47c8224..2b57ce8 100644
--- a/simple/src/main/res/values/dimens.xml
+++ b/simple/src/main/res/values/dimens.xml
@@ -1,5 +1,5 @@
 <resources>
     <!-- Default screen margins, per the Android Design guidelines. -->
-    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_horizontal_margin">400dp</dimen>
     <dimen name="activity_vertical_margin">16dp</dimen>
 </resources>