diff --git a/cocos/platform/android/java/project.properties b/cocos/platform/android/java/project.properties
index 88ca83f9d0..f2c8b26db8 100644
--- a/cocos/platform/android/java/project.properties
+++ b/cocos/platform/android/java/project.properties
@@ -12,4 +12,4 @@
 
 android.library=true
 # Project target.
-target=android-10
+target=android-21
diff --git a/cocos/platform/android/java/src/org/cocos2dx/lib/Cocos2dxActivity.java b/cocos/platform/android/java/src/org/cocos2dx/lib/Cocos2dxActivity.java
index 9981f9b8c0..cfe8c8bf98 100644
--- a/cocos/platform/android/java/src/org/cocos2dx/lib/Cocos2dxActivity.java
+++ b/cocos/platform/android/java/src/org/cocos2dx/lib/Cocos2dxActivity.java
@@ -39,6 +39,7 @@ import android.preference.PreferenceManager.OnActivityResultListener;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.ViewGroup;
+import android.view.View;
 import android.view.Window;
 import android.view.WindowManager;
 import android.widget.FrameLayout;
@@ -258,6 +259,8 @@ public abstract class Cocos2dxActivity extends Activity implements Cocos2dxHelpe
     protected void onCreate(final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        this.hideVirtualButton();
+
         onLoadNativeLibraries();
 
         sContext = this;
@@ -301,6 +304,7 @@ public abstract class Cocos2dxActivity extends Activity implements Cocos2dxHelpe
     protected void onResume() {
     	Log.d(TAG, "onResume()");
         super.onResume();
+        this.hideVirtualButton();
        	resumeIfHasFocus();
     }
     
@@ -308,6 +312,7 @@ public abstract class Cocos2dxActivity extends Activity implements Cocos2dxHelpe
     public void onWindowFocusChanged(boolean hasFocus) {
     	Log.d(TAG, "onWindowFocusChanged() hasFocus=" + hasFocus);
         super.onWindowFocusChanged(hasFocus);
+        this.hideVirtualButton();
         
         this.hasFocus = hasFocus;
         resumeIfHasFocus();
@@ -411,6 +416,20 @@ public abstract class Cocos2dxActivity extends Activity implements Cocos2dxHelpe
         return glSurfaceView;
     }
 
+    protected void hideVirtualButton() {
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
+
+            getWindow().getDecorView().setSystemUiVisibility(
+                    View.SYSTEM_UI_FLAG_LAYOUT_STABLE
+                            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
+                            | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+                            | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION // hide nav bar
+                            | View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
+                            | View.SYSTEM_UI_FLAG_IMMERSIVE);
+        }
+    }
+
    private final static boolean isAndroidEmulator() {
       String model = Build.MODEL;
       Log.d(TAG, "model=" + model);