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 3900c3cc..26ba1856 100644
--- a/Android/app/src/main/java/pub/doric/demo/MainActivity.java
+++ b/Android/app/src/main/java/pub/doric/demo/MainActivity.java
@@ -75,10 +75,8 @@ public class MainActivity extends AppCompatActivity {
 
     @Subscribe(threadMode = ThreadMode.MAIN)
     public void onEnterDebugEvent(EnterDebugEvent enterDebugEvent) {
-        ((FrameLayout) findViewById(R.id.root)).removeAllViews();
         DoricDriver.getInstance().changeJSEngine(false);
         doricContext.init(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
-        doricContext.getRootNode().setRootView((FrameLayout) findViewById(R.id.root));
     }
 
     @Override
diff --git a/Android/doric/src/main/java/pub/doric/engine/DoricJSEngine.java b/Android/doric/src/main/java/pub/doric/engine/DoricJSEngine.java
index 7d7896bf..e7965961 100644
--- a/Android/doric/src/main/java/pub/doric/engine/DoricJSEngine.java
+++ b/Android/doric/src/main/java/pub/doric/engine/DoricJSEngine.java
@@ -211,13 +211,18 @@ public class DoricJSEngine implements Handler.Callback, DoricTimerExtension.Time
         return mDoricRegistry;
     }
 
-    public void changeJSEngine(boolean isNative) {
-        mDoricJSE.teardown();
-        if (isNative) {
-            mDoricJSE = new DoricNativeJSExecutor();
-        } else {
-            mDoricJSE = new DoricRemoteJSExecutor();
-        }
-        injectGlobal();
+    public void changeJSEngine(final boolean isNative) {
+        mJSHandler.post(new Runnable() {
+            @Override
+            public void run() {
+                mDoricJSE.teardown();
+                if (isNative) {
+                    mDoricJSE = new DoricNativeJSExecutor();
+                } else {
+                    mDoricJSE = new DoricRemoteJSExecutor();
+                }
+                injectGlobal();
+            }
+        });
     }
 }