diff --git a/Android/app/src/main/java/pub/doric/demo/MainActivity.java b/Android/app/src/main/java/pub/doric/demo/MainActivity.java
index 26ba1856..ece1b1a1 100644
--- a/Android/app/src/main/java/pub/doric/demo/MainActivity.java
+++ b/Android/app/src/main/java/pub/doric/demo/MainActivity.java
@@ -38,7 +38,8 @@ import pub.doric.utils.DoricUtils;
 
 public class MainActivity extends AppCompatActivity {
 
-    private DevPanel mDevPanel = new DevPanel();
+    private DevPanel devPanel = new DevPanel();
+
     private DoricContext doricContext;
 
     @Override
@@ -82,7 +83,7 @@ public class MainActivity extends AppCompatActivity {
     @Override
     public boolean onKeyDown(int keyCode, KeyEvent event) {
         if (KeyEvent.KEYCODE_MENU == event.getKeyCode()) {
-            mDevPanel.show(getSupportFragmentManager(), "DevPanel");
+            devPanel.show(getSupportFragmentManager(), "DevPanel");
         }
         return super.onKeyDown(keyCode, event);
     }
diff --git a/Android/doric/src/main/java/pub/doric/Doric.java b/Android/doric/src/main/java/pub/doric/Doric.java
index 6acdd4fb..f2ac8561 100644
--- a/Android/doric/src/main/java/pub/doric/Doric.java
+++ b/Android/doric/src/main/java/pub/doric/Doric.java
@@ -19,6 +19,9 @@ import android.app.Application;
 
 import com.google.gson.JsonObject;
 
+import pub.doric.dev.DevKit;
+import pub.doric.dev.IDevKit;
+
 /**
  * @Description: Doric
  * @Author: pengfei.zhou
@@ -36,15 +39,15 @@ public class Doric {
     }
 
     public static void connectDevKit(String url) {
-        DoricDriver.getInstance().connectDevKit(url);
+        DevKit.getInstance().connectDevKit(url);
     }
 
-    public static void sendDevCommand(IDoricDriver.Command command, JsonObject jsonObject) {
-        DoricDriver.getInstance().sendDevCommand(command, jsonObject);
+    public static void sendDevCommand(IDevKit.Command command, JsonObject jsonObject) {
+        DevKit.getInstance().sendDevCommand(command, jsonObject);
     }
 
     public static void disconnectDevKit() {
-        DoricDriver.getInstance().disconnectDevKit();
+        DevKit.getInstance().disconnectDevKit();
     }
 
 }
diff --git a/Android/doric/src/main/java/pub/doric/DoricDriver.java b/Android/doric/src/main/java/pub/doric/DoricDriver.java
index b831d5e4..d4d562b8 100644
--- a/Android/doric/src/main/java/pub/doric/DoricDriver.java
+++ b/Android/doric/src/main/java/pub/doric/DoricDriver.java
@@ -19,7 +19,6 @@ import android.os.Handler;
 import android.os.Looper;
 
 import com.github.pengfeizhou.jscore.JSDecoder;
-import com.google.gson.JsonObject;
 
 import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutorService;
@@ -27,11 +26,9 @@ import java.util.concurrent.Executors;
 
 import pub.doric.async.AsyncCall;
 import pub.doric.async.AsyncResult;
-import pub.doric.dev.WSClient;
 import pub.doric.engine.DoricJSEngine;
 import pub.doric.utils.DoricConstant;
 import pub.doric.utils.DoricLog;
-import pub.doric.utils.DoricUtils;
 import pub.doric.utils.ThreadMode;
 
 /**
@@ -44,7 +41,6 @@ public class DoricDriver implements IDoricDriver {
     private final ExecutorService mBridgeExecutor;
     private final Handler mUIHandler;
     private final Handler mJSHandler;
-    private WSClient wsClient;
 
     @Override
     public AsyncResult<JSDecoder> invokeContextEntityMethod(final String contextId, final String method, final Object... args) {
@@ -139,25 +135,6 @@ public class DoricDriver implements IDoricDriver {
         return doricJSEngine.getRegistry();
     }
 
-    @Override
-    public void connectDevKit(String url) {
-        wsClient = new WSClient(url);
-    }
-
-    @Override
-    public void sendDevCommand(Command command, JsonObject jsonObject) {
-        JsonObject result = new JsonObject();
-        result.addProperty("cmd", command.toString());
-        result.add("data", jsonObject);
-        wsClient.send(DoricUtils.gson.toJson(result));
-    }
-
-    @Override
-    public void disconnectDevKit() {
-        wsClient.close();
-        wsClient = null;
-    }
-
     public void changeJSEngine(boolean isNative) {
         doricJSEngine.changeJSEngine(isNative);
     }
diff --git a/Android/doric/src/main/java/pub/doric/IDoricDriver.java b/Android/doric/src/main/java/pub/doric/IDoricDriver.java
index b3cba549..afaf8625 100644
--- a/Android/doric/src/main/java/pub/doric/IDoricDriver.java
+++ b/Android/doric/src/main/java/pub/doric/IDoricDriver.java
@@ -17,7 +17,6 @@ package pub.doric;
 
 
 import com.github.pengfeizhou.jscore.JSDecoder;
-import com.google.gson.JsonObject;
 
 import java.util.concurrent.Callable;
 
@@ -31,10 +30,6 @@ import pub.doric.utils.ThreadMode;
  */
 public interface IDoricDriver {
 
-    enum Command {
-        DEBUG, HOT_RELOAD
-    }
-
     AsyncResult<JSDecoder> invokeContextEntityMethod(final String contextId, final String method, final Object... args);
 
     AsyncResult<JSDecoder> invokeDoricMethod(final String method, final Object... args);
@@ -46,10 +41,4 @@ public interface IDoricDriver {
     AsyncResult<Boolean> destroyContext(final String contextId);
 
     DoricRegistry getRegistry();
-
-    void connectDevKit(String url);
-
-    void sendDevCommand(Command command, JsonObject jsonObject);
-
-    void disconnectDevKit();
 }
diff --git a/Android/doric/src/main/java/pub/doric/dev/DevKit.java b/Android/doric/src/main/java/pub/doric/dev/DevKit.java
new file mode 100644
index 00000000..66e2e56d
--- /dev/null
+++ b/Android/doric/src/main/java/pub/doric/dev/DevKit.java
@@ -0,0 +1,41 @@
+package pub.doric.dev;
+
+import com.google.gson.JsonObject;
+
+import pub.doric.utils.DoricUtils;
+
+public class DevKit implements IDevKit {
+
+    private static class Inner {
+        private static final DevKit sInstance = new DevKit();
+    }
+
+    private DevKit() {
+    }
+
+    public static DevKit getInstance() {
+        return Inner.sInstance;
+    }
+
+
+    private WSClient wsClient;
+
+    @Override
+    public void connectDevKit(String url) {
+        wsClient = new WSClient(url);
+    }
+
+    @Override
+    public void sendDevCommand(IDevKit.Command command, JsonObject jsonObject) {
+        JsonObject result = new JsonObject();
+        result.addProperty("cmd", command.toString());
+        result.add("data", jsonObject);
+        wsClient.send(DoricUtils.gson.toJson(result));
+    }
+
+    @Override
+    public void disconnectDevKit() {
+        wsClient.close();
+        wsClient = null;
+    }
+}
diff --git a/Android/doric/src/main/java/pub/doric/dev/DevPanel.java b/Android/doric/src/main/java/pub/doric/dev/DevPanel.java
index 1a0efc44..1037b715 100644
--- a/Android/doric/src/main/java/pub/doric/dev/DevPanel.java
+++ b/Android/doric/src/main/java/pub/doric/dev/DevPanel.java
@@ -27,7 +27,6 @@ import pub.doric.BuildConfig;
 import pub.doric.Doric;
 import pub.doric.DoricContext;
 import pub.doric.DoricContextManager;
-import pub.doric.IDoricDriver;
 import pub.doric.R;
 import pub.doric.dev.event.EOFEvent;
 import pub.doric.dev.event.OpenEvent;
@@ -86,7 +85,7 @@ public class DevPanel extends BottomSheetDialogFragment {
                     JsonObject jsonObject = new JsonObject();
                     jsonObject.addProperty("contextId", doricContext.getContextId());
                     jsonObject.addProperty("projectHome", BuildConfig.PROJECT_HOME);
-                    Doric.sendDevCommand(IDoricDriver.Command.DEBUG, jsonObject);
+                    Doric.sendDevCommand(IDevKit.Command.DEBUG, jsonObject);
                 }
             }
         });
diff --git a/Android/doric/src/main/java/pub/doric/dev/IDevKit.java b/Android/doric/src/main/java/pub/doric/dev/IDevKit.java
new file mode 100644
index 00000000..767c0ceb
--- /dev/null
+++ b/Android/doric/src/main/java/pub/doric/dev/IDevKit.java
@@ -0,0 +1,18 @@
+package pub.doric.dev;
+
+import com.google.gson.JsonObject;
+
+import pub.doric.IDoricDriver;
+
+public interface IDevKit {
+
+    enum Command {
+        DEBUG, HOT_RELOAD
+    }
+
+    void connectDevKit(String url);
+
+    void sendDevCommand(IDevKit.Command command, JsonObject jsonObject);
+
+    void disconnectDevKit();
+}