diff --git a/.idea/misc.xml b/.idea/misc.xml
index 3ca66fa..07a2aac 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -24,7 +24,7 @@
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/src/main/java/com/a1anwang/okble_demo/views/MyDialog.java b/app/src/main/java/com/a1anwang/okble_demo/views/MyDialog.java
index 6b0c775..2ea5f30 100755
--- a/app/src/main/java/com/a1anwang/okble_demo/views/MyDialog.java
+++ b/app/src/main/java/com/a1anwang/okble_demo/views/MyDialog.java
@@ -59,10 +59,7 @@ protected void onCreate(Bundle savedInstanceState) {
 					btn_right.setVisibility(View.GONE);
 					line_vertical.setVisibility(View.GONE);
 				}
-
 			}
-
-		
 		this.setContentView(view);
 	}
 
diff --git a/app/src/main/res/layout/layout_hexinput.xml b/app/src/main/res/layout/layout_hexinput.xml
index 932d8d2..bcab59a 100644
--- a/app/src/main/res/layout/layout_hexinput.xml
+++ b/app/src/main/res/layout/layout_hexinput.xml
@@ -220,6 +220,6 @@
         android:layout_width="match_parent"
         android:layout_height="40dp"
         android:background="@drawable/bg_hex_button"
-        android:text="返回"
+        android:text="@string/back"
         android:textSize="18sp" />
 </LinearLayout>
diff --git a/app/src/main/res/layout/layout_service_data_input.xml b/app/src/main/res/layout/layout_service_data_input.xml
index 58a0b95..0ef7b56 100644
--- a/app/src/main/res/layout/layout_service_data_input.xml
+++ b/app/src/main/res/layout/layout_service_data_input.xml
@@ -279,7 +279,7 @@
             android:layout_weight="1"
             android:layout_height="40dp"
             android:background="@drawable/bg_hex_button"
-            android:text="返回"
+            android:text="@string/back"
             android:textSize="18sp" />
     </LinearLayout>
 
diff --git a/app/src/main/res/layout/layout_service_uuid_input.xml b/app/src/main/res/layout/layout_service_uuid_input.xml
index f133bb6..8597737 100644
--- a/app/src/main/res/layout/layout_service_uuid_input.xml
+++ b/app/src/main/res/layout/layout_service_uuid_input.xml
@@ -244,7 +244,7 @@
             android:layout_weight="1"
             android:layout_height="40dp"
             android:background="@drawable/bg_hex_button"
-            android:text="返回"
+            android:text="@string/back"
             android:textSize="18sp" />
     </LinearLayout>
 
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
index fd99f67..52cfff0 100644
--- a/app/src/main/res/values-zh/strings.xml
+++ b/app/src/main/res/values-zh/strings.xml
@@ -9,4 +9,6 @@
     <string name="yes">是</string>
 
     <string name="no">否</string>
+
+    <string name="back">返回</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index fd0cf8d..9e6a0f2 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -8,4 +8,6 @@
     <string name="yes">Yes</string>
 
     <string name="no">No</string>
+
+    <string name="back">Back</string>
 </resources>
diff --git a/okble-lib/src/main/java/com/a1anwang/okble/client/core/OKBLEDevice.java b/okble-lib/src/main/java/com/a1anwang/okble/client/core/OKBLEDevice.java
index 004cfd6..1e5a20e 100644
--- a/okble-lib/src/main/java/com/a1anwang/okble/client/core/OKBLEDevice.java
+++ b/okble-lib/src/main/java/com/a1anwang/okble/client/core/OKBLEDevice.java
@@ -29,6 +29,8 @@ public enum DeviceStatus{
      */
     String getDeviceTAG();
 
+    BluetoothDevice getBluetoothDevice();
+
     void addDeviceListener(OKBLEDeviceListener OKBLEDeviceListener);
     void removeDeviceListener(OKBLEDeviceListener OKBLEDeviceListener);
     void clearDeviceListener();
diff --git a/okble-lib/src/main/java/com/a1anwang/okble/client/core/OKBLEDeviceImp.java b/okble-lib/src/main/java/com/a1anwang/okble/client/core/OKBLEDeviceImp.java
index a2b605b..960f947 100644
--- a/okble-lib/src/main/java/com/a1anwang/okble/client/core/OKBLEDeviceImp.java
+++ b/okble-lib/src/main/java/com/a1anwang/okble/client/core/OKBLEDeviceImp.java
@@ -136,6 +136,11 @@ public String getDeviceTAG() {
         return deviceTAG;
     }
 
+    @Override
+    public BluetoothDevice getBluetoothDevice() {
+        return this.bluetoothDevice;
+    }
+
 
     public OKBLEDeviceImp(Context context) {
         this.context = context;
diff --git a/okble-lib/src/main/java/com/a1anwang/okble/client/core/OKBLEDeviceListener.java b/okble-lib/src/main/java/com/a1anwang/okble/client/core/OKBLEDeviceListener.java
index ce03fb7..ea5a0b3 100644
--- a/okble-lib/src/main/java/com/a1anwang/okble/client/core/OKBLEDeviceListener.java
+++ b/okble-lib/src/main/java/com/a1anwang/okble/client/core/OKBLEDeviceListener.java
@@ -7,16 +7,16 @@
 
 public interface OKBLEDeviceListener {
 
-    public void onConnected(String deviceTAG);
+     void onConnected(String deviceTAG);
 
-    public void onDisconnected(String deviceTAG);
-    public void onReadBattery(String deviceTAG, int battery);
+     void onDisconnected(String deviceTAG);
+     void onReadBattery(String deviceTAG, int battery);
 
-    public void onReceivedValue(String deviceTAG,String uuid,byte[] value);
+     void onReceivedValue(String deviceTAG,String uuid,byte[] value);
 
-    public void onWriteValue(String deviceTAG,String uuid,byte[] value,boolean success);
+     void onWriteValue(String deviceTAG,String uuid,byte[] value,boolean success);
 
-    public void onReadValue(String deviceTAG,String uuid,byte[] value,boolean success);
+     void onReadValue(String deviceTAG,String uuid,byte[] value,boolean success);
 
-    public void onNotifyOrIndicateComplete(String deviceTAG,String uuid,boolean enable,boolean success);
+     void onNotifyOrIndicateComplete(String deviceTAG,String uuid,boolean enable,boolean success);
 }