diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index cd2ead8..a1299e5 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -10,12 +10,14 @@
           <set>
             <option value="$PROJECT_DIR$" />
             <option value="$PROJECT_DIR$/app" />
+            <option value="$PROJECT_DIR$/bannerlibrary" />
           </set>
         </option>
         <option name="myModules">
           <set>
             <option value="$PROJECT_DIR$" />
             <option value="$PROJECT_DIR$/app" />
+            <option value="$PROJECT_DIR$/bannerlibrary" />
           </set>
         </option>
       </GradleProjectSettings>
diff --git a/.idea/modules.xml b/.idea/modules.xml
index edfdfc6..3efe563 100644
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -4,6 +4,7 @@
     <modules>
       <module fileurl="file://$PROJECT_DIR$/Banner.iml" filepath="$PROJECT_DIR$/Banner.iml" />
       <module fileurl="file://$PROJECT_DIR$/app/app.iml" filepath="$PROJECT_DIR$/app/app.iml" />
+      <module fileurl="file://$PROJECT_DIR$/bannerlibrary/bannerlibrary.iml" filepath="$PROJECT_DIR$/bannerlibrary/bannerlibrary.iml" />
     </modules>
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..94a25f7
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/app/build.gradle b/app/build.gradle
index 4530bd7..a0980b2 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -20,7 +20,8 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
+    compile fileTree(include: ['*.jar'], dir: 'libs')
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:24.1.1'
+    compile project(':bannerlibrary')
 }
diff --git a/app/src/main/java/com/github/wanglu1209/banner/demo/AdapterDemo.java b/app/src/main/java/com/github/wanglu1209/banner/demo/AdapterDemo.java
index 7717f6e..7204a5d 100644
--- a/app/src/main/java/com/github/wanglu1209/banner/demo/AdapterDemo.java
+++ b/app/src/main/java/com/github/wanglu1209/banner/demo/AdapterDemo.java
@@ -5,8 +5,8 @@
 import android.view.View;
 import android.widget.ImageView;
 
-import com.github.wanglu1209.banner.BannerPagerAdapter;
 import com.github.wanglu1209.banner.R;
+import com.github.wanglu1209.bannerlibrary.BannerPagerAdapter;
 
 import java.util.List;
 
diff --git a/app/src/main/java/com/github/wanglu1209/banner/demo/MainActivity.java b/app/src/main/java/com/github/wanglu1209/banner/demo/MainActivity.java
index 4cd1b40..6b90a41 100644
--- a/app/src/main/java/com/github/wanglu1209/banner/demo/MainActivity.java
+++ b/app/src/main/java/com/github/wanglu1209/banner/demo/MainActivity.java
@@ -4,9 +4,9 @@
 import android.support.v7.app.AppCompatActivity;
 import android.widget.Toast;
 
-import com.github.wanglu1209.banner.Banner;
-import com.github.wanglu1209.banner.BannerPagerAdapter;
 import com.github.wanglu1209.banner.R;
+import com.github.wanglu1209.bannerlibrary.Banner;
+import com.github.wanglu1209.bannerlibrary.BannerPagerAdapter;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 78c621a..605ed63 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -6,8 +6,8 @@
     tools:context=".demo.MainActivity">
 
 
-    <com.github.wanglu1209.banner.Banner
+    <com.github.wanglu1209.bannerlibrary.Banner
         android:id="@+id/banner"
         android:layout_width="match_parent"
-        android:layout_height="200dp"></com.github.wanglu1209.banner.Banner>
+        android:layout_height="200dp"></com.github.wanglu1209.bannerlibrary.Banner>
 </RelativeLayout>
diff --git a/bannerlibrary/.gitignore b/bannerlibrary/.gitignore
new file mode 100644
index 0000000..796b96d
--- /dev/null
+++ b/bannerlibrary/.gitignore
@@ -0,0 +1 @@
+/build
diff --git a/bannerlibrary/build.gradle b/bannerlibrary/build.gradle
new file mode 100644
index 0000000..4ba234e
--- /dev/null
+++ b/bannerlibrary/build.gradle
@@ -0,0 +1,25 @@
+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion 24
+    buildToolsVersion "24.0.1"
+
+    defaultConfig {
+        minSdkVersion 19
+        targetSdkVersion 24
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    testCompile 'junit:junit:4.12'
+    compile 'com.android.support:appcompat-v7:24.1.1'
+}
diff --git a/bannerlibrary/proguard-rules.pro b/bannerlibrary/proguard-rules.pro
new file mode 100644
index 0000000..942a0af
--- /dev/null
+++ b/bannerlibrary/proguard-rules.pro
@@ -0,0 +1,17 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /Users/WangLu/Library/Android/sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
diff --git a/bannerlibrary/src/androidTest/java/com/github/wanglu1209/bannerlibrary/ApplicationTest.java b/bannerlibrary/src/androidTest/java/com/github/wanglu1209/bannerlibrary/ApplicationTest.java
new file mode 100644
index 0000000..4255daa
--- /dev/null
+++ b/bannerlibrary/src/androidTest/java/com/github/wanglu1209/bannerlibrary/ApplicationTest.java
@@ -0,0 +1,13 @@
+package com.github.wanglu1209.bannerlibrary;
+
+import android.app.Application;
+import android.test.ApplicationTestCase;
+
+/**
+ * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
+ */
+public class ApplicationTest extends ApplicationTestCase<Application> {
+    public ApplicationTest() {
+        super(Application.class);
+    }
+}
\ No newline at end of file
diff --git a/bannerlibrary/src/main/AndroidManifest.xml b/bannerlibrary/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..7351134
--- /dev/null
+++ b/bannerlibrary/src/main/AndroidManifest.xml
@@ -0,0 +1,11 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.github.wanglu1209.bannerlibrary">
+
+    <application
+        android:allowBackup="true"
+        android:label="@string/app_name"
+        android:supportsRtl="true">
+
+    </application>
+
+</manifest>
diff --git a/app/src/main/java/com/github/wanglu1209/banner/Banner.java b/bannerlibrary/src/main/java/com/github/wanglu1209/bannerlibrary/Banner.java
similarity index 99%
rename from app/src/main/java/com/github/wanglu1209/banner/Banner.java
rename to bannerlibrary/src/main/java/com/github/wanglu1209/bannerlibrary/Banner.java
index efaece6..eaeff47 100644
--- a/app/src/main/java/com/github/wanglu1209/banner/Banner.java
+++ b/bannerlibrary/src/main/java/com/github/wanglu1209/bannerlibrary/Banner.java
@@ -1,4 +1,4 @@
-package com.github.wanglu1209.banner;
+package com.github.wanglu1209.bannerlibrary;
 
 import android.content.Context;
 import android.support.v4.view.ViewPager;
diff --git a/app/src/main/java/com/github/wanglu1209/banner/BannerPagerAdapter.java b/bannerlibrary/src/main/java/com/github/wanglu1209/bannerlibrary/BannerPagerAdapter.java
similarity index 98%
rename from app/src/main/java/com/github/wanglu1209/banner/BannerPagerAdapter.java
rename to bannerlibrary/src/main/java/com/github/wanglu1209/bannerlibrary/BannerPagerAdapter.java
index efe5de6..1d37a89 100644
--- a/app/src/main/java/com/github/wanglu1209/banner/BannerPagerAdapter.java
+++ b/bannerlibrary/src/main/java/com/github/wanglu1209/bannerlibrary/BannerPagerAdapter.java
@@ -1,4 +1,4 @@
-package com.github.wanglu1209.banner;
+package com.github.wanglu1209.bannerlibrary;
 
 import android.content.Context;
 import android.support.v4.view.PagerAdapter;
diff --git a/app/src/main/java/com/github/wanglu1209/banner/BannerViewPager.java b/bannerlibrary/src/main/java/com/github/wanglu1209/bannerlibrary/BannerViewPager.java
similarity index 97%
rename from app/src/main/java/com/github/wanglu1209/banner/BannerViewPager.java
rename to bannerlibrary/src/main/java/com/github/wanglu1209/bannerlibrary/BannerViewPager.java
index dea7ae4..4a54ddf 100644
--- a/app/src/main/java/com/github/wanglu1209/banner/BannerViewPager.java
+++ b/bannerlibrary/src/main/java/com/github/wanglu1209/bannerlibrary/BannerViewPager.java
@@ -1,4 +1,4 @@
-package com.github.wanglu1209.banner;
+package com.github.wanglu1209.bannerlibrary;
 
 import android.content.Context;
 import android.os.Handler;
diff --git a/bannerlibrary/src/main/res/values/strings.xml b/bannerlibrary/src/main/res/values/strings.xml
new file mode 100644
index 0000000..fd7665e
--- /dev/null
+++ b/bannerlibrary/src/main/res/values/strings.xml
@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">BannerLibrary</string>
+</resources>
diff --git a/bannerlibrary/src/test/java/com/github/wanglu1209/bannerlibrary/ExampleUnitTest.java b/bannerlibrary/src/test/java/com/github/wanglu1209/bannerlibrary/ExampleUnitTest.java
new file mode 100644
index 0000000..86982c8
--- /dev/null
+++ b/bannerlibrary/src/test/java/com/github/wanglu1209/bannerlibrary/ExampleUnitTest.java
@@ -0,0 +1,15 @@
+package com.github.wanglu1209.bannerlibrary;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * To work on unit tests, switch the Test Artifact in the Build Variants view.
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() throws Exception {
+        assertEquals(4, 2 + 2);
+    }
+}
\ No newline at end of file
diff --git a/settings.gradle b/settings.gradle
index e7b4def..e20afa0 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1 +1 @@
-include ':app'
+include ':app', ':bannerlibrary'