diff --git a/README.md b/README.md
index 96a3162..95d76fb 100644
--- a/README.md
+++ b/README.md
@@ -31,112 +31,112 @@ compile 'com.kcode.github:autoScrollViewPager:0.7.0'
 ##Usage
 * in layout
 
-```
-    <com.kcode.autoscrollviewpager.view.AutoScrollViewPager
-        android:id="@+id/viewPager"
-        android:layout_width="match_parent"
-        android:layout_height="220dp">
-        
-    </com.kcode.autoscrollviewpager.view.AutoScrollViewPager>
-```
+    ```
+        <com.kcode.autoscrollviewpager.view.AutoScrollViewPager
+            android:id="@+id/viewPager"
+            android:layout_width="match_parent"
+            android:layout_height="220dp">
+            
+        </com.kcode.autoscrollviewpager.view.AutoScrollViewPager>
+    ```
 
 
 * in activity:
-
-```
-	package com.kcode.autoviewpager;
-    
-    import android.os.Bundle;
-    import android.support.v7.app.AppCompatActivity;
-    import android.widget.ImageView;
-    import android.widget.Toast;
-    
-    import com.kcode.autoscrollviewpager.view.AutoScrollViewPager;
-    import com.kcode.autoscrollviewpager.view.BaseViewPagerAdapter;
-    import com.kcode.autoviewpager.bean.Picture;
-    import com.squareup.picasso.Picasso;
-    
-    import java.util.ArrayList;
-    import java.util.List;
     
-    public class MainActivity extends AppCompatActivity {
-    
-        private AutoScrollViewPager mViewPager;
-    
-        private String[] paths = {"https://ss3.baidu.com/-fo3dSag_xI4khGko9WTAnF6hhy/image/h%3D200/sign=c493b482b47eca800d053ee7a1229712/8cb1cb1349540923abd671df9658d109b2de49d7.jpg",
-                "https://ss0.baidu.com/94o3dSag_xI4khGko9WTAnF6hhy/image/h%3D200/sign=45fbfa5555da81cb51e684cd6267d0a4/2f738bd4b31c8701491ea047237f9e2f0608ffe3.jpg",
-                "https://ss2.baidu.com/-vo3dSag_xI4khGko9WTAnF6hhy/image/h%3D200/sign=ae0e95c0fc1986185e47e8847aec2e69/0b46f21fbe096b63eb314ef108338744ebf8ac62.jpg",
-                "https://ss3.baidu.com/9fo3dSag_xI4khGko9WTAnF6hhy/image/h%3D200/sign=1fad2b46952397ddc9799f046983b216/dc54564e9258d109c94bbb13d558ccbf6d814de2.jpg",
-                "https://ss1.baidu.com/9vo3dSag_xI4khGko9WTAnF6hhy/image/h%3D200/sign=ff0999f6d4160924c325a51be406359b/86d6277f9e2f070861ccd4a0ed24b899a801f241.jpg"};
-    
-        @Override
-        protected void onCreate(Bundle savedInstanceState) {
-            super.onCreate(savedInstanceState);
-            setContentView(R.layout.activity_main);
-    
-            mViewPager = (AutoScrollViewPager) findViewById(R.id.viewPager);
-            mViewPager.setAdapter(new BaseViewPagerAdapter<String>(this,initData(),listener) {
+    ```
+        package com.kcode.autoviewpager;
+        
+        import android.os.Bundle;
+        import android.support.v7.app.AppCompatActivity;
+        import android.widget.ImageView;
+        import android.widget.Toast;
+        
+        import com.kcode.autoscrollviewpager.view.AutoScrollViewPager;
+        import com.kcode.autoscrollviewpager.view.BaseViewPagerAdapter;
+        import com.kcode.autoviewpager.bean.Picture;
+        import com.squareup.picasso.Picasso;
+        
+        import java.util.ArrayList;
+        import java.util.List;
+        
+        public class MainActivity extends AppCompatActivity {
+        
+            private AutoScrollViewPager mViewPager;
+        
+            private String[] paths = {"https://ss3.baidu.com/-fo3dSag_xI4khGko9WTAnF6hhy/image/h%3D200/sign=c493b482b47eca800d053ee7a1229712/8cb1cb1349540923abd671df9658d109b2de49d7.jpg",
+                    "https://ss0.baidu.com/94o3dSag_xI4khGko9WTAnF6hhy/image/h%3D200/sign=45fbfa5555da81cb51e684cd6267d0a4/2f738bd4b31c8701491ea047237f9e2f0608ffe3.jpg",
+                    "https://ss2.baidu.com/-vo3dSag_xI4khGko9WTAnF6hhy/image/h%3D200/sign=ae0e95c0fc1986185e47e8847aec2e69/0b46f21fbe096b63eb314ef108338744ebf8ac62.jpg",
+                    "https://ss3.baidu.com/9fo3dSag_xI4khGko9WTAnF6hhy/image/h%3D200/sign=1fad2b46952397ddc9799f046983b216/dc54564e9258d109c94bbb13d558ccbf6d814de2.jpg",
+                    "https://ss1.baidu.com/9vo3dSag_xI4khGko9WTAnF6hhy/image/h%3D200/sign=ff0999f6d4160924c325a51be406359b/86d6277f9e2f070861ccd4a0ed24b899a801f241.jpg"};
+        
+            @Override
+            protected void onCreate(Bundle savedInstanceState) {
+                super.onCreate(savedInstanceState);
+                setContentView(R.layout.activity_main);
+        
+                mViewPager = (AutoScrollViewPager) findViewById(R.id.viewPager);
+                mViewPager.setAdapter(new BaseViewPagerAdapter<String>(this,initData(),listener) {
+                    @Override
+                    public void loadImage(ImageView view, int position, String url) {
+                        Picasso.with(MainActivity.this).load(url).into(view);
+                    }
+                });
+            }
+        
+            private List<String> initData() {
+                List<String> data = new ArrayList<>();
+                Picture picture ;
+                for (int i = 0 ; i < paths.length ;i++){
+                    data.add(paths[i]);
+                }
+                return data;
+            }
+        
+            @Override
+            protected void onDestroy() {
+                super.onDestroy();
+                mViewPager.onDestroy();
+            }
+        
+            private BaseViewPagerAdapter.OnAutoViewPagerItemClickListener listener = new BaseViewPagerAdapter.OnAutoViewPagerItemClickListener<Picture>() {
+        
                 @Override
-                public void loadImage(ImageView view, int position, String url) {
-                    Picasso.with(MainActivity.this).load(url).into(view);
+                public void onItemClick(int position, Picture picture) {
+                    Toast.makeText(getApplicationContext(),
+        
+                            picture.getName(), Toast.LENGTH_SHORT).show();
                 }
-            });
+            };
         }
     
-        private List<String> initData() {
-            List<String> data = new ArrayList<>();
-            Picture picture ;
-            for (int i = 0 ; i < paths.length ;i++){
-                data.add(paths[i]);
-            }
-            return data;
-        }
     
-        @Override
-        protected void onDestroy() {
-            super.onDestroy();
-            mViewPager.onDestroy();
-        }
+    ```
+
+
+    Override```public void loadImage(ImageView view, int position, String url)``` to load image to ImageView.
+
+
+* OnClick
+
     
-        private BaseViewPagerAdapter.OnAutoViewPagerItemClickListener listener = new BaseViewPagerAdapter.OnAutoViewPagerItemClickListener<Picture>() {
+    ```
+    private BaseViewPagerAdapter.OnAutoViewPagerItemClickListener listener = new BaseViewPagerAdapter.OnAutoViewPagerItemClickListener<String>() {
     
             @Override
-            public void onItemClick(int position, Picture picture) {
+            public void onItemClick(int position, String url) {
                 Toast.makeText(getApplicationContext(),
     
-                        picture.getName(), Toast.LENGTH_SHORT).show();
+                        url, Toast.LENGTH_SHORT).show();
             }
         };
-    }
-
-
-```
-
+    ```
 
-Override```public void loadImage(ImageView view, int position, String url)``` to load image to ImageView.
-
-
-* OnClick
-
-```
-private BaseViewPagerAdapter.OnAutoViewPagerItemClickListener listener = new BaseViewPagerAdapter.OnAutoViewPagerItemClickListener<String>() {
-
-        @Override
-        public void onItemClick(int position, String url) {
-            Toast.makeText(getApplicationContext(),
-
-                    url, Toast.LENGTH_SHORT).show();
-        }
-    };
-```
-
-init OnClickListener
-
-```
-public BaseViewPagerAdapter(Context context, List<T> data,OnAutoViewPagerItemClickListener listener)
-
-```
+    init OnClickListener
 
+    ```
+    public BaseViewPagerAdapter(Context context, List<T> data,OnAutoViewPagerItemClickListener listener)
+    
+    ```
 sample:[AutoViewPager](https://github.com/fccaikai/AutoScrollViewPager/tree/master/app)
 
 
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index de12ba5..ed58c84 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -2,6 +2,7 @@
 <RelativeLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/activity_main"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
diff --git a/autoScrollViewPager/src/main/java/com/kcode/autoscrollviewpager/view/AutoScrollViewPager.java b/autoScrollViewPager/src/main/java/com/kcode/autoscrollviewpager/view/AutoScrollViewPager.java
index dc820a9..ab6d821 100644
--- a/autoScrollViewPager/src/main/java/com/kcode/autoscrollviewpager/view/AutoScrollViewPager.java
+++ b/autoScrollViewPager/src/main/java/com/kcode/autoscrollviewpager/view/AutoScrollViewPager.java
@@ -1,7 +1,9 @@
 package com.kcode.autoscrollviewpager.view;
 
 import android.content.Context;
+import android.content.res.TypedArray;
 import android.util.AttributeSet;
+import android.view.Gravity;
 import android.view.ViewGroup;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
@@ -9,14 +11,22 @@
 
 import com.kcode.autoscrollviewpager.R;
 
-import static android.view.Gravity.CENTER;
-
 /**
  * Created by caik on 2016/10/17.
  */
 
 public class AutoScrollViewPager extends RelativeLayout {
 
+    private final static String LEFT_POINT = "left";
+    private final static String RIGHT_POINT = "right";
+    private final static String CENTER_POINT = "center";
+
+    private final static int RIGHT_INT = 0;
+    private final static int CENTER_INT = 1;
+    private final static int LEFT_INT = 2;
+
+    private int pointLayout;
+
     private AutoViewPager mViewPager;
 
     private Context mContext;
@@ -29,8 +39,33 @@ public AutoScrollViewPager(Context context) {
     }
 
     public AutoScrollViewPager(Context context, AttributeSet attrs) {
-        super(context, attrs);
+        this(context,attrs,0);
+    }
+
+    public AutoScrollViewPager(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+
+        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.AutoScrollViewPager, defStyleAttr, 0);
+
+        String pointLayoutStr = typedArray.getString(R.styleable.AutoScrollViewPager_point_layout);
+        switch (pointLayoutStr) {
+            case LEFT_POINT:
+                pointLayout = LEFT_INT;
+                break;
+            case RIGHT_POINT:
+                pointLayout = RIGHT_INT;
+                break;
+            case CENTER_POINT:
+                pointLayout = CENTER_INT;
+                break;
+            default:
+                break;
+        }
+
+        typedArray.recycle();
+
         init(context);
+
     }
 
     private void init(Context context) {
@@ -57,7 +92,7 @@ public void initPointView(int size) {
             ImageView imageView = new ImageView(mContext);
             LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(20, 20);
             params.leftMargin = 8;
-            params.gravity = CENTER;
+            params.gravity = Gravity.CENTER;
             imageView.setLayoutParams(params);
             if (i == 0) {
                 imageView.setBackgroundResource(R.drawable.point_checked);
@@ -70,7 +105,22 @@ public void initPointView(int size) {
 
         LayoutParams layoutParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
         layoutParams.addRule(ALIGN_PARENT_BOTTOM);
-        layoutParams.addRule(ALIGN_PARENT_RIGHT);
+        switch (pointLayout) {
+            case RIGHT_INT:
+                layoutParams.addRule(ALIGN_PARENT_RIGHT);
+                break;
+            case LEFT_INT:
+                layoutParams.addRule(ALIGN_PARENT_LEFT);
+                break;
+            case CENTER_INT:
+                layoutParams.addRule(CENTER_HORIZONTAL);
+                break;
+            default:
+                layoutParams.addRule(ALIGN_PARENT_RIGHT);
+                break;
+        }
+
+
         layoutParams.setMargins(12, 20, 12, 20);
         layout.setLayoutParams(layoutParams);
         addView(layout);
diff --git a/autoScrollViewPager/src/main/res/values/attr.xml b/autoScrollViewPager/src/main/res/values/attr.xml
new file mode 100644
index 0000000..af38fc7
--- /dev/null
+++ b/autoScrollViewPager/src/main/res/values/attr.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    
+    <declare-styleable name="AutoScrollViewPager">
+
+        <attr name="point_layout" format="string"></attr>
+
+    </declare-styleable>
+
+</resources>
\ No newline at end of file