diff --git a/README.md b/README.md
index bd913e1..4eb3f8f 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
 # DataAutoAccess
+[![Releases](https://img.shields.io/github/release/ThirtyDegreesRay/DataAutoAccess.svg)](https://github.com/ThirtyDegreesRay/DataAutoAccess/releases/latest)
+
 自动存取Android Bundle中数据——给需要自动存取的变量添加注解，编译时会通过注解处理自动生成存取的代码
 
 * Activity或Service启动时自动取出Intent中的数据，并赋值给相应的field
@@ -59,8 +61,8 @@ Then, apply the 'android-apt' plugin in your module-level build.gradle and add t
     }
     
     dependencies {
-        compile 'com.thirtydegreesray:dataautoaccess:1.2.6'
-        apt 'com.thirtydegreesray:dataautoaccess-compiler:1.2.6'
+        compile 'com.thirtydegreesray:dataautoaccess:latestVersion'
+        apt 'com.thirtydegreesray:dataautoaccess-compiler:latestVersion'
     }
     
 ## Proguard
diff --git a/build.gradle b/build.gradle
index 7b0ff71..c2631c4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,8 +6,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.3'
-        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
+        classpath 'com.android.tools.build:gradle:2.3.3'
 
         classpath "com.github.dcendents:android-maven-gradle-plugin:1.5"
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.0'
diff --git a/dataautoaccess-annotations/build.gradle b/dataautoaccess-annotations/build.gradle
index 363468d..bbbb4c0 100644
--- a/dataautoaccess-annotations/build.gradle
+++ b/dataautoaccess-annotations/build.gradle
@@ -8,8 +8,8 @@ dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
 }
 
-sourceCompatibility = "1.6"
-targetCompatibility = "1.6"
+targetCompatibility = '1.7'
+sourceCompatibility = '1.7'
 
 def siteUrl = 'https://github.com/ThirtyDegreesRay/DataAutoAccess'   // 项目的主页
 def gitUrl = 'https://github.com/ThirtyDegreesRay/DataAutoAccess.git'   // Git仓库的url
diff --git a/dataautoaccess-compiler/build.gradle b/dataautoaccess-compiler/build.gradle
index 8d4a7a0..6601667 100644
--- a/dataautoaccess-compiler/build.gradle
+++ b/dataautoaccess-compiler/build.gradle
@@ -10,8 +10,8 @@ dependencies {
     compile project(':dataautoaccess-annotations')
 }
 
-sourceCompatibility = "1.6"
-targetCompatibility = "1.6"
+targetCompatibility = '1.7'
+sourceCompatibility = '1.7'
 
 def siteUrl = 'https://github.com/ThirtyDegreesRay/DataAutoAccess'   // 项目的主页
 def gitUrl = 'https://github.com/ThirtyDegreesRay/DataAutoAccess.git'   // Git仓库的url
diff --git a/dataautoaccess/build.gradle b/dataautoaccess/build.gradle
index 7f83b11..fbbd1f5 100644
--- a/dataautoaccess/build.gradle
+++ b/dataautoaccess/build.gradle
@@ -1,16 +1,15 @@
 apply plugin: 'com.android.library'
-
 apply plugin: 'com.github.dcendents.android-maven'
 apply plugin: 'com.jfrog.bintray'
 version = VERSION_NAME
 
 android {
-    compileSdkVersion 24
-    buildToolsVersion "24.0.2"
+    compileSdkVersion 26
+    buildToolsVersion "26.0.2"
 
     defaultConfig {
         minSdkVersion 9
-        targetSdkVersion 24
+        targetSdkVersion 26
         versionCode VERSION_CODE as int
         versionName VERSION_NAME
 
diff --git a/dataautoaccess/src/main/java/com/thirtydegreesray/dataautoaccess/DataAutoAccess.java b/dataautoaccess/src/main/java/com/thirtydegreesray/dataautoaccess/DataAutoAccess.java
index d5f30cd..857171d 100644
--- a/dataautoaccess/src/main/java/com/thirtydegreesray/dataautoaccess/DataAutoAccess.java
+++ b/dataautoaccess/src/main/java/com/thirtydegreesray/dataautoaccess/DataAutoAccess.java
@@ -8,6 +8,7 @@
 
 import java.util.ArrayList;
 import java.util.LinkedHashMap;
+import java.util.List;
 
 /**
  * Data auto access<br>
@@ -70,8 +71,8 @@ public static void getData(Object targetObject, Bundle dataStore) {
             return;
         }
 
-        DataAccessor<Object> dataAccessor = getDataAccessor(targetObject, dataStore);
-        if (dataAccessor != null) {
+        List<DataAccessor<Object>> dataAccessors = getDataAccessors(targetObject);
+        for(DataAccessor<Object> dataAccessor : dataAccessors){
             dataAccessor.getData(targetObject, dataStore);
         }
     }
@@ -87,16 +88,30 @@ public static void saveData(Object targetObject, Bundle dataStore) {
             return;
         }
 
-        DataAccessor<Object> dataAccessor = getDataAccessor(targetObject, dataStore);
-        if (dataAccessor != null) {
+        List<DataAccessor<Object>> dataAccessors = getDataAccessors(targetObject);
+        for(DataAccessor<Object> dataAccessor : dataAccessors){
             dataAccessor.saveData(targetObject, dataStore);
         }
     }
 
-    private static DataAccessor<Object> getDataAccessor(Object targetObject, Bundle dataStore) {
+    private static List<DataAccessor<Object>> getDataAccessors(Object targetObject) {
+        List<DataAccessor<Object>> dataAccessors = new ArrayList<>();
         Class<?> targetClass = targetObject.getClass();
+        getDataAccessors(dataAccessors, targetClass);
+        return dataAccessors;
+    }
+
+    private static List<DataAccessor<Object>> getDataAccessors(
+            List<DataAccessor<Object>> dataAccessors, Class<?> targetClass) {
         String className = targetClass.getName() + SUFFIX;
-        return getDataAccessor(className);
+        DataAccessor<Object> dataAccessor = getDataAccessor(className);
+        if(dataAccessor != null){
+            dataAccessors.add(dataAccessor);
+        }
+        if(targetClass.getSuperclass() != null){
+            getDataAccessors(dataAccessors, targetClass.getSuperclass());
+        }
+        return dataAccessors;
     }
 
     private static DataAccessor<Object> getDataAccessor(String className) {
diff --git a/gradle.properties b/gradle.properties
index 4224a0e..c2b86c2 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -17,6 +17,6 @@ org.gradle.jvmargs=-Xmx1536m
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
 
-VERSION_NAME = 1.2.6
-VERSION_CODE = 16
+VERSION_NAME = 1.2.7
+VERSION_CODE = 17
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 04e285f..69eeffb 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Mon Dec 28 10:00:20 PST 2015
+#Tue Jul 25 21:40:01 CST 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
\ No newline at end of file
diff --git a/sample/build.gradle b/sample/build.gradle
index f4080a3..c038938 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -1,14 +1,13 @@
 apply plugin: 'com.android.application'
-apply plugin: 'android-apt'
 
 android {
-    compileSdkVersion 24
-    buildToolsVersion "24.0.2"
+    compileSdkVersion 26
+    buildToolsVersion "26.0.2"
 
     defaultConfig {
         applicationId "com.thirtydegreesray.dataautoaccess.sample"
-        minSdkVersion 9
-        targetSdkVersion 24
+        minSdkVersion 14
+        targetSdkVersion 26
         versionCode 1
         versionName "1.0"
 
@@ -32,8 +31,9 @@ dependencies {
     androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    compile 'com.android.support:appcompat-v7:24.2.0'
+    compile 'com.android.support:appcompat-v7:26.+'
     testCompile 'junit:junit:4.12'
-    compile project(':dataautoaccess')
-    apt project(':dataautoaccess-compiler')
+    compile project(path: ':dataautoaccess')
+    compile project(path: ':dataautoaccess-annotations')
+    annotationProcessor project(path: ':dataautoaccess-compiler')
 }
diff --git a/sample/src/main/java/com/thirtydegreesray/dataautoaccess/sample/BaseActivity.java b/sample/src/main/java/com/thirtydegreesray/dataautoaccess/sample/BaseActivity.java
index 0a11ed8..771460d 100644
--- a/sample/src/main/java/com/thirtydegreesray/dataautoaccess/sample/BaseActivity.java
+++ b/sample/src/main/java/com/thirtydegreesray/dataautoaccess/sample/BaseActivity.java
@@ -5,12 +5,16 @@
 import android.support.v7.app.AppCompatActivity;
 
 import com.thirtydegreesray.dataautoaccess.DataAutoAccess;
+import com.thirtydegreesray.dataautoaccess.annotation.AutoAccess;
 
 /**
  * Created by ThirtyDegreesRay on 2016/9/1 09:58
  */
 
 public class BaseActivity extends AppCompatActivity {
+
+    @AutoAccess protected boolean started ;
+
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -23,4 +27,5 @@ protected void onSaveInstanceState(Bundle outState) {
         //save data
         DataAutoAccess.saveData(this, outState);
     }
+
 }
diff --git a/sample/src/main/java/com/thirtydegreesray/dataautoaccess/sample/ExampleActivity.java b/sample/src/main/java/com/thirtydegreesray/dataautoaccess/sample/ExampleActivity.java
index 7942dfd..b6a5059 100644
--- a/sample/src/main/java/com/thirtydegreesray/dataautoaccess/sample/ExampleActivity.java
+++ b/sample/src/main/java/com/thirtydegreesray/dataautoaccess/sample/ExampleActivity.java
@@ -19,6 +19,7 @@ public class ExampleActivity extends BaseActivity {
 
     private TextView tvName;
     private TextView tvDescription;
+    private TextView tvStarted;
 
     private Bundle testBundle;
 
@@ -29,11 +30,14 @@ protected void onCreate(@Nullable Bundle savedInstanceState) {
 
         tvName = (TextView) findViewById(R.id.tv_name);
         tvDescription = (TextView) findViewById(R.id.tv_description);
+        tvStarted = (TextView) findViewById(R.id.tv_started);
         tvName.setText(name);
         tvDescription.setText(description);
+        tvStarted.setText(started ? "started" : "starting");
 
         testBundle = new Bundle();
         DataAutoAccess.saveData(this, testBundle);
+        started = true;
     }
 
     public void onSaveDataClick(View view){
diff --git a/sample/src/main/res/layout/activity_example.xml b/sample/src/main/res/layout/activity_example.xml
index 71140c0..0d8acaf 100644
--- a/sample/src/main/res/layout/activity_example.xml
+++ b/sample/src/main/res/layout/activity_example.xml
@@ -20,6 +20,13 @@
         android:gravity="center"
         android:textColor="@android:color/black"
         android:textSize="16sp" />
+    <TextView
+        android:id="@+id/tv_started"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:textColor="@android:color/black"
+        android:textSize="16sp" />
 
     <Button
         android:layout_width="120dp"