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 40dd7050e95..308e438a95d 100644
--- a/cocos/platform/android/java/src/org/cocos2dx/lib/Cocos2dxActivity.java
+++ b/cocos/platform/android/java/src/org/cocos2dx/lib/Cocos2dxActivity.java
@@ -421,24 +421,29 @@ protected void hideVirtualButton() {
             // use reflection to remove dependence of API level
 
             Class viewClass = View.class;
-            final int SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION = Cocos2dxReflectionHelper.<Integer>getConstantValue(viewClass, "SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION");
-            final int SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN = Cocos2dxReflectionHelper.<Integer>getConstantValue(viewClass, "SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN");
-            final int SYSTEM_UI_FLAG_HIDE_NAVIGATION = Cocos2dxReflectionHelper.<Integer>getConstantValue(viewClass, "SYSTEM_UI_FLAG_HIDE_NAVIGATION");
-            final int SYSTEM_UI_FLAG_FULLSCREEN = Cocos2dxReflectionHelper.<Integer>getConstantValue(viewClass, "SYSTEM_UI_FLAG_FULLSCREEN");
-            final int SYSTEM_UI_FLAG_IMMERSIVE_STICKY = Cocos2dxReflectionHelper.<Integer>getConstantValue(viewClass, "SYSTEM_UI_FLAG_IMMERSIVE_STICKY");
-            final int SYSTEM_UI_FLAG_LAYOUT_STABLE = Cocos2dxReflectionHelper.<Integer>getConstantValue(viewClass, "SYSTEM_UI_FLAG_LAYOUT_STABLE");
-
-            // getWindow().getDecorView().setSystemUiVisibility();
-            final Object[] parameters = new Object[]{SYSTEM_UI_FLAG_LAYOUT_STABLE
-                    | SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
-                    | SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
-                    | SYSTEM_UI_FLAG_HIDE_NAVIGATION // hide nav bar
-                    | SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
-                    | SYSTEM_UI_FLAG_IMMERSIVE_STICKY};
-            Cocos2dxReflectionHelper.<Void>invokeInstanceMethod(getWindow().getDecorView(),
-                    "setSystemUiVisibility",
-                    new Class[]{Integer.TYPE},
-                    parameters);
+
+            try {
+                final int SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION = Cocos2dxReflectionHelper.<Integer>getConstantValue(viewClass, "SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION");
+                final int SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN = Cocos2dxReflectionHelper.<Integer>getConstantValue(viewClass, "SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN");
+                final int SYSTEM_UI_FLAG_HIDE_NAVIGATION = Cocos2dxReflectionHelper.<Integer>getConstantValue(viewClass, "SYSTEM_UI_FLAG_HIDE_NAVIGATION");
+                final int SYSTEM_UI_FLAG_FULLSCREEN = Cocos2dxReflectionHelper.<Integer>getConstantValue(viewClass, "SYSTEM_UI_FLAG_FULLSCREEN");
+                final int SYSTEM_UI_FLAG_IMMERSIVE_STICKY = Cocos2dxReflectionHelper.<Integer>getConstantValue(viewClass, "SYSTEM_UI_FLAG_IMMERSIVE_STICKY");
+                final int SYSTEM_UI_FLAG_LAYOUT_STABLE = Cocos2dxReflectionHelper.<Integer>getConstantValue(viewClass, "SYSTEM_UI_FLAG_LAYOUT_STABLE");
+
+                // getWindow().getDecorView().setSystemUiVisibility();
+                final Object[] parameters = new Object[]{SYSTEM_UI_FLAG_LAYOUT_STABLE
+                        | SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
+                        | SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+                        | SYSTEM_UI_FLAG_HIDE_NAVIGATION // hide nav bar
+                        | SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
+                        | SYSTEM_UI_FLAG_IMMERSIVE_STICKY};
+                Cocos2dxReflectionHelper.<Void>invokeInstanceMethod(getWindow().getDecorView(),
+                        "setSystemUiVisibility",
+                        new Class[]{Integer.TYPE},
+                        parameters);
+            } catch (NullPointerException e) {
+                Log.e(TAG, "hideVirtualButton", e);
+            }
         }
     }
 
diff --git a/cocos/platform/android/java/src/org/cocos2dx/lib/Cocos2dxHelper.java b/cocos/platform/android/java/src/org/cocos2dx/lib/Cocos2dxHelper.java
index c53b2690144..a6b725733b8 100644
--- a/cocos/platform/android/java/src/org/cocos2dx/lib/Cocos2dxHelper.java
+++ b/cocos/platform/android/java/src/org/cocos2dx/lib/Cocos2dxHelper.java
@@ -1,6 +1,6 @@
 /****************************************************************************
 Copyright (c) 2010-2012 cocos2d-x.org
-Copyright (c) 2013-2014 Chukong Technologies Inc.
+Copyright (c) 2013-2016 Chukong Technologies Inc.
 
 http://www.cocos2d-x.org
 
@@ -130,9 +130,12 @@ public static void init(final Activity activity) {
                 parameters = new Object[]{Cocos2dxReflectionHelper.<String>getConstantValue(audioManagerClass, "PROPERTY_OUTPUT_FRAMES_PER_BUFFER")};
                 final String strBufferSizeInFrames = Cocos2dxReflectionHelper.<String>invokeInstanceMethod(am, "getProperty", new Class[]{String.class}, parameters);
 
-                sampleRate = Integer.parseInt(strSampleRate);
-                bufferSizeInFrames = Integer.parseInt(strBufferSizeInFrames);
-
+                try {
+                    sampleRate = Integer.parseInt(strSampleRate);
+                    bufferSizeInFrames = Integer.parseInt(strBufferSizeInFrames);
+                } catch (NumberFormatException e) {
+                    Log.e(TAG, "parseInt failed", e);
+                }
                 Log.d(TAG, "sampleRate: " + sampleRate + ", framesPerBuffer: " + bufferSizeInFrames);
             } else {
                 Log.d(TAG, "android version is lower than 17");