diff --git a/README-cn.md b/README-cn.md
index 38463c2..a3d31f6 100644
--- a/README-cn.md
+++ b/README-cn.md
@@ -14,7 +14,7 @@ Demo 项目移到了这里: https://github.com/liaohuqiu/android-cube-app
 
 #### 依赖源
 
-最新版版本号: `1.0.44.17-SNAPSHOT`, 发布到了: `https://oss.sonatype.org/content/repositories/snapshots`
+最新版版本号: `1.0.44`, 发布到了: `https://oss.sonatype.org/content/repositories/snapshots`
 
 *   在gradle中:
 
@@ -61,7 +61,7 @@ mavenCentral()
     <type>aar</type>
     <!-- or apklib format, if you want -->
     <!-- <type>apklib</type> -->
-    <version>1.0.44.17-SNAPSHOT</version>
+    <version>1.0.44</version>
 </dependency>
 ```
 
@@ -81,7 +81,7 @@ mavenCentral()
 *   gradle / Android Studio, 最新版
 
 ```
-compile 'in.srain.cube:cube-sdk:1.0.44.17-SNAPSHOT@aar'
+compile 'in.srain.cube:cube-sdk:1.0.44@aar'
 ```
 
 *   gradle / Android Studio, 稳定版
diff --git a/README.md b/README.md
index be981dc..1e11c15 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ http://cube-sdk.liaohuqiu.net
 
 #### Repository
 
-The latest version: `1.0.44.17-SNAPSHOT`, has been published to: https://oss.sonatype.org/content/repositories/snapshots, in gradle:
+The latest version: `1.0.44`, has been published to: https://oss.sonatype.org/content/repositories/snapshots, in gradle:
 
 *   gradle
 
@@ -62,7 +62,7 @@ The stable version: `1.0.42`, https://oss.sonatype.org/content/repositories/rele
     <type>aar</type>
     <!-- or apklib format, if you want -->
     <!-- <type>apklib</type> -->
-    <version>1.0.44.17-SNAPSHOT</version>
+    <version>1.0.44</version>
 </dependency>
 ```
 
@@ -82,7 +82,7 @@ The stable version: `1.0.42`, https://oss.sonatype.org/content/repositories/rele
 *   gradle, latest version:
 
 ```
-compile 'in.srain.cube:cube-sdk:1.0.44.17-SNAPSHOT@aar'
+compile 'in.srain.cube:cube-sdk:1.0.44@aar'
 ```
 
 *   gradle, stable version:
diff --git a/core/gradle.properties b/core/gradle.properties
index d6c5438..4042a98 100644
--- a/core/gradle.properties
+++ b/core/gradle.properties
@@ -1,4 +1,4 @@
-VERSION_NAME=1.0.44.17-SNAPSHOT
+VERSION_NAME=1.0.44
 
 ANDROID_BUILD_MIN_SDK_VERSION=8
 ANDROID_BUILD_TARGET_SDK_VERSION=16
diff --git a/core/pom.xml b/core/pom.xml
index 3c8c2cb..ea9a907 100755
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -13,7 +13,7 @@
     <artifactId>cube-sdk</artifactId>
     <packaging>aar</packaging>
     <name>Cube SDK</name>
-    <version>1.0.44.17-SNAPSHOT</version>
+    <version>1.0.44</version>
 
     <dependencies>
         <dependency>
diff --git a/core/src/in/srain/cube/image/CubeImageView.java b/core/src/in/srain/cube/image/CubeImageView.java
index 7b342d5..5616626 100755
--- a/core/src/in/srain/cube/image/CubeImageView.java
+++ b/core/src/in/srain/cube/image/CubeImageView.java
@@ -182,6 +182,8 @@ protected void onLayout(boolean changed, int left, int top, int right, int botto
     private void tryLoadImage() {
 
         if (TextUtils.isEmpty(mUrl)) {
+            setImageDrawable(null);
+            mImageTask = null;
             return;
         }
 
diff --git a/core/src/in/srain/cube/request/JsonData.java b/core/src/in/srain/cube/request/JsonData.java
index eb4ce0e..bf3a011 100755
--- a/core/src/in/srain/cube/request/JsonData.java
+++ b/core/src/in/srain/cube/request/JsonData.java
@@ -12,6 +12,8 @@ public final class JsonData {
 
     private Object mJson;
     private static final String EMPTY_STRING = "";
+    private static final JSONArray EMPTY_JSON_ARRAY = new JSONArray();
+    private static final JSONObject EMPTY_JSON_OBJECT = new JSONObject();
 
     public static JsonData newMap() {
         return create(new HashMap<String, Object>());
@@ -145,7 +147,7 @@ public JSONObject optMapOrNew() {
         if (mJson instanceof JSONObject) {
             return (JSONObject) mJson;
         }
-        return new JSONObject();
+        return EMPTY_JSON_OBJECT;
     }
 
     private Object valueForPut(Object value) {
@@ -234,7 +236,7 @@ public JSONArray optArrayOrNew() {
         if (mJson instanceof JSONArray) {
             return (JSONArray) mJson;
         }
-        return new JSONArray();
+        return EMPTY_JSON_ARRAY;
     }
 
     public int length() {
diff --git a/core/src/in/srain/cube/views/list/ListPageInfo.java b/core/src/in/srain/cube/views/list/ListPageInfo.java
index 6e5a9e4..b8f684e 100755
--- a/core/src/in/srain/cube/views/list/ListPageInfo.java
+++ b/core/src/in/srain/cube/views/list/ListPageInfo.java
@@ -23,6 +23,9 @@ public void updateListInfo(List<T> dataList, int total) {
     }
 
     private void addMore(List<T> dataList) {
+        if (dataList == null) {
+            return;
+        }
         if (mStart == 0 || mDataList == null) {
             mDataList = new ArrayList<T>();
         }
@@ -79,6 +82,11 @@ public boolean isEmpty() {
         return mDataList == null || mDataList.size() == 0;
     }
 
+    /**
+     * try to move to next page
+     *
+     * @return
+     */
     public boolean nextPage() {
         if (hasMore()) {
             mStart += mNumPerPage;
@@ -98,6 +106,30 @@ public int getListLength() {
         return mDataList.size();
     }
 
+    /**
+     * the first item in list
+     *
+     * @return
+     */
+    public T firstItem() {
+        if (mDataList == null || mDataList.size() == 0) {
+            return null;
+        }
+        return mDataList.get(0);
+    }
+
+    /**
+     * the last item in list
+     *
+     * @return
+     */
+    public T lastItem() {
+        if (mDataList == null || mDataList.size() == 0) {
+            return null;
+        }
+        return mDataList.get(mDataList.size() - 1);
+    }
+
     public boolean hasMore() {
         return mDataList == null || mHasMore;
     }
diff --git a/update-project.py b/update-project.py
index c95ec92..d542678 100644
--- a/update-project.py
+++ b/update-project.py
@@ -1,6 +1,6 @@
 import os
 vars = {
-        'cube_sdk_version': '1.0.44.17-SNAPSHOT',
+        'cube_sdk_version': '1.0.44',
         'cube_sdk_stable_version': '1.0.42'
         }