diff --git a/bone/build.gradle b/bone/build.gradle
index 6ead2d2..695b45a 100644
--- a/bone/build.gradle
+++ b/bone/build.gradle
@@ -1,11 +1,17 @@
 apply plugin: 'com.android.library'
 apply plugin: 'com.neenbedankt.android-apt'
 apply plugin: 'com.jakewharton.butterknife'
+apply plugin: 'me.tatarka.retrolambda'
 
 android {
     compileSdkVersion rootProject.ext.compileSdkVersion
     buildToolsVersion rootProject.ext.buildToolsVersion
 
+    compileOptions {
+        sourceCompatibility rootProject.ext.sourceCompatibility
+        targetCompatibility rootProject.ext.targetCompatibility
+    }
+
     dexOptions {
         javaMaxHeapSize "4g" //specify the heap size for the dex process
         preDexLibraries = false //delete the already predexed libraries
@@ -20,10 +26,7 @@ android {
         multiDexEnabled true
     }
 
-    compileOptions {
-        sourceCompatibility rootProject.ext.sourceCompatibility
-        targetCompatibility rootProject.ext.targetCompatibility
-    }
+
     buildTypes {
         release {
             minifyEnabled false
@@ -60,6 +63,10 @@ dependencies {
     compile deps.rxpermissions
     compile deps.rxpreferences
 
+    // permissionsDispatcher
+    compile deps.permissionsDispatcher
+    apt deps.permissionsDispatcherProcessor
+
     // db
     compile deps.dbflowcore
     compile deps.dbflow
diff --git a/bone/src/main/java/com/idogfooding/bone/image/PhotoAdapter.java b/bone/src/main/java/com/idogfooding/bone/image/PhotoAdapter.java
index a81f2ac..63fd3cb 100644
--- a/bone/src/main/java/com/idogfooding/bone/image/PhotoAdapter.java
+++ b/bone/src/main/java/com/idogfooding/bone/image/PhotoAdapter.java
@@ -138,17 +138,16 @@ private ArrayList<String> removeMoreItem() {
         return list;
     }
 
-
     @Override
     public int getItemCount() {
         return mPhotoPaths.size();
     }
 
-    public static class PhotoViewHolder extends RecyclerView.ViewHolder {
+    class PhotoViewHolder extends RecyclerView.ViewHolder {
         private ImageView ivPhoto;
         private View vSelected;
 
-        public PhotoViewHolder(View itemView) {
+        PhotoViewHolder(View itemView) {
             super(itemView);
             ivPhoto = (ImageView) itemView.findViewById(R.id.iv_photo);
             vSelected = itemView.findViewById(R.id.v_selected);
diff --git a/bone/src/main/java/com/idogfooding/bone/utils/AppInfoUtils.java b/bone/src/main/java/com/idogfooding/bone/utils/AppInfoUtils.java
new file mode 100644
index 0000000..b56c094
--- /dev/null
+++ b/bone/src/main/java/com/idogfooding/bone/utils/AppInfoUtils.java
@@ -0,0 +1,62 @@
+package com.idogfooding.bone.utils;
+
+import android.content.Context;
+import android.content.pm.PackageInfo;
+
+/**
+ * AppInfoUtils
+ *
+ * @author Charles
+ */
+public class AppInfoUtils {
+
+    /**
+     * get package info
+     * @param context
+     * @return
+     */
+    public static PackageInfo getPackageInfo(Context context) {
+        try {
+            return context.getPackageManager().getPackageInfo(context.getPackageName(), 0);
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    /**
+     * get package name
+     */
+    public static String getPackageName(Context context) {
+        try {
+            return context.getPackageManager().getPackageInfo(context.getPackageName(), 0).packageName;
+        } catch (Exception e) {
+            e.printStackTrace();
+            return "";
+        }
+    }
+
+    /**
+     * get the current version name
+     */
+    public static String getVersionName(Context context) {
+        try {
+            return context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionName;
+        } catch (Exception e) {
+            e.printStackTrace();
+            return "";
+        }
+    }
+
+    /**
+     * get the current versionCode
+     */
+    public static int getVersionCode(Context context) {
+        try {
+            return context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionCode;
+        } catch (Exception e) {
+            e.printStackTrace();
+            return 0;
+        }
+    }
+}
diff --git a/bone/src/main/java/com/idogfooding/bone/utils/SettingsUtils.java b/bone/src/main/java/com/idogfooding/bone/utils/SettingsUtils.java
index a7a1a49..eb47dae 100644
--- a/bone/src/main/java/com/idogfooding/bone/utils/SettingsUtils.java
+++ b/bone/src/main/java/com/idogfooding/bone/utils/SettingsUtils.java
@@ -12,19 +12,20 @@
 public class SettingsUtils {
 
     public static Intent openApplicationSettings(String packageName) {
-        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.GINGERBREAD) {
-            Intent intent = new Intent(android.provider.Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
-            intent.setData(Uri.parse("package:" + packageName));
-            return intent;
-        }
-        return new Intent();
+        Intent intent = new Intent(android.provider.Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
+        intent.setData(Uri.parse("package:" + packageName));
+        return intent;
     }
 
     public static void openApplicationSettings(Context context, String packageName) {
-        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.GINGERBREAD) {
-            Intent intent = openApplicationSettings(packageName);
-            context.startActivity(intent);
-        }
+        Intent intent = openApplicationSettings(packageName);
+        context.startActivity(intent);
+    }
+
+    public static void openApplicationSettings(Context context) {
+        String packageName = AppInfoUtils.getPackageName(context);
+        Intent intent = openApplicationSettings(packageName);
+        context.startActivity(intent);
     }
 
 }
diff --git a/bone/src/main/java/com/idogfooding/bone/utils/VersionUtils.java b/bone/src/main/java/com/idogfooding/bone/utils/VersionUtils.java
deleted file mode 100644
index 8a104af..0000000
--- a/bone/src/main/java/com/idogfooding/bone/utils/VersionUtils.java
+++ /dev/null
@@ -1,35 +0,0 @@
-package com.idogfooding.bone.utils;
-
-import android.content.Context;
-
-/**
- * Version Utils
- *
- * @author Charles
- */
-public class VersionUtils {
-
-    /**
-     * get the current version
-     */
-    public static String getCurrentVersion(Context context) {
-        try {
-            return context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionName;
-        } catch (Exception e) {
-            e.printStackTrace();
-            return "";
-        }
-    }
-
-    /**
-     * get the current versionCode
-     */
-    public static int getCurrentVersionCode(Context context) {
-        try {
-            return context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionCode;
-        } catch (Exception e) {
-            e.printStackTrace();
-            return 0;
-        }
-    }
-}
diff --git a/bone/src/main/res/values/strings.xml b/bone/src/main/res/values/strings.xml
index e1d6dcb..8a87eeb 100644
--- a/bone/src/main/res/values/strings.xml
+++ b/bone/src/main/res/values/strings.xml
@@ -17,6 +17,7 @@
     <string name="close">关闭</string>
     <string name="loading">加载中,请稍等&#8230;</string>
     <string name="edit">编辑</string>
+    <string name="denied">拒绝</string>
     <string name="agreement">我已经阅读并同意《用户使用协议》</string>
 
     <!-- account -->
diff --git a/build.gradle b/build.gradle
index 3ed22a8..986fc7d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -10,8 +10,8 @@ ext {
     targetSdkVersion = 24
 
     // compileOptions
-    sourceCompatibility = JavaVersion.VERSION_1_7
-    targetCompatibility = JavaVersion.VERSION_1_7
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
 }
 
 ext.deps = [