diff --git a/app/src/main/java/com/hippo/ehviewer/ui/DirPickerActivity.java b/app/src/main/java/com/hippo/ehviewer/ui/DirPickerActivity.java
index 798c8205c..535316727 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/DirPickerActivity.java
+++ b/app/src/main/java/com/hippo/ehviewer/ui/DirPickerActivity.java
@@ -151,15 +151,4 @@ public class DirPickerActivity extends ToolbarActivity
             mPath.setText(dir.getPath());
         }
     }
-
-    @Override
-    protected void onResume() {
-        super.onResume();
-        if(Settings.getEnabledSecurity()){
-            getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE,
-                    WindowManager.LayoutParams.FLAG_SECURE);
-        }else{
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
-        }
-    }
 }
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/EhActivity.java b/app/src/main/java/com/hippo/ehviewer/ui/EhActivity.java
index 474702f8e..f379ffdb7 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/EhActivity.java
+++ b/app/src/main/java/com/hippo/ehviewer/ui/EhActivity.java
@@ -19,6 +19,8 @@ package com.hippo.ehviewer.ui;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.WindowManager;
 
 import com.google.analytics.tracking.android.EasyTracker;
 import com.hippo.ehviewer.EhApplication;
@@ -61,4 +63,15 @@ public abstract class EhActivity extends AppCompatActivity {
             mTrackStarted = false;
         }
     }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        if(Settings.getEnabledSecurity()){
+            getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE,
+                    WindowManager.LayoutParams.FLAG_SECURE);
+        }else{
+            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
+        }
+    }
 }
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/EhPreferenceActivity.java b/app/src/main/java/com/hippo/ehviewer/ui/EhPreferenceActivity.java
index 6efdabb30..6863eebd4 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/EhPreferenceActivity.java
+++ b/app/src/main/java/com/hippo/ehviewer/ui/EhPreferenceActivity.java
@@ -18,6 +18,8 @@ package com.hippo.ehviewer.ui;
 
 import android.os.Bundle;
 import android.support.annotation.Nullable;
+import android.util.Log;
+import android.view.WindowManager;
 
 import com.google.analytics.tracking.android.EasyTracker;
 import com.hippo.app.AppCompatPreferenceActivity;
@@ -61,4 +63,15 @@ public abstract class EhPreferenceActivity extends AppCompatPreferenceActivity {
             mTrackStarted = false;
         }
     }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        if(Settings.getEnabledSecurity()){
+            getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE,
+                    WindowManager.LayoutParams.FLAG_SECURE);
+        }else{
+            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
+        }
+    }
 }
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/GalleryActivity.java b/app/src/main/java/com/hippo/ehviewer/ui/GalleryActivity.java
index dd9b273cf..2910c148f 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/GalleryActivity.java
+++ b/app/src/main/java/com/hippo/ehviewer/ui/GalleryActivity.java
@@ -407,12 +407,6 @@ public class GalleryActivity extends EhActivity implements SeekBar.OnSeekBarChan
         if (mGLRootView != null) {
             mGLRootView.onResume();
         }
-        if(Settings.getEnabledSecurity()){
-            getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE,
-                    WindowManager.LayoutParams.FLAG_SECURE);
-        }else{
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
-        }
     }
 
     @Override
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/LicenseActivity.java b/app/src/main/java/com/hippo/ehviewer/ui/LicenseActivity.java
index 0f39c3ce0..17a1f3c85 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/LicenseActivity.java
+++ b/app/src/main/java/com/hippo/ehviewer/ui/LicenseActivity.java
@@ -19,11 +19,9 @@ package com.hippo.ehviewer.ui;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.view.MenuItem;
-import android.view.WindowManager;
 import android.webkit.WebView;
 
 import com.hippo.ehviewer.R;
-import com.hippo.ehviewer.Settings;
 
 public class LicenseActivity extends ToolbarActivity {
 
@@ -61,15 +59,4 @@ public class LicenseActivity extends ToolbarActivity {
                 return super.onOptionsItemSelected(item);
         }
     }
-
-    @Override
-    protected void onResume() {
-        super.onResume();
-        if(Settings.getEnabledSecurity()){
-            getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE,
-                    WindowManager.LayoutParams.FLAG_SECURE);
-        }else{
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
-        }
-    }
 }
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/MainActivity.java b/app/src/main/java/com/hippo/ehviewer/ui/MainActivity.java
index 7d30ab3c5..f0032a5c9 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/MainActivity.java
+++ b/app/src/main/java/com/hippo/ehviewer/ui/MainActivity.java
@@ -36,7 +36,6 @@ import android.text.TextUtils;
 import android.view.Gravity;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.WindowManager;
 import android.widget.FrameLayout;
 import android.widget.TextView;
 import android.widget.Toast;
@@ -393,13 +392,6 @@ public final class MainActivity extends StageActivity
         super.onResume();
 
         setNavCheckedItem(mNavCheckedItem);
-
-        if(Settings.getEnabledSecurity()){
-            getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE,
-                    WindowManager.LayoutParams.FLAG_SECURE);
-        }else{
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
-        }
     }
 
     @Override
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/SetSecurityActivity.java b/app/src/main/java/com/hippo/ehviewer/ui/SetSecurityActivity.java
index a678c4da6..e17ca11a0 100755
--- a/app/src/main/java/com/hippo/ehviewer/ui/SetSecurityActivity.java
+++ b/app/src/main/java/com/hippo/ehviewer/ui/SetSecurityActivity.java
@@ -22,7 +22,6 @@ import android.support.annotation.Nullable;
 import android.text.TextUtils;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.WindowManager;
 import android.widget.CheckBox;
 
 import com.hippo.ehviewer.R;
@@ -109,15 +108,4 @@ public class SetSecurityActivity extends ToolbarActivity implements View.OnClick
             finish();
         }
     }
-
-    @Override
-    protected void onResume() {
-        super.onResume();
-        if(Settings.getEnabledSecurity()){
-            getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE,
-                    WindowManager.LayoutParams.FLAG_SECURE);
-        }else{
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
-        }
-    }
 }
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/SettingsActivity.java b/app/src/main/java/com/hippo/ehviewer/ui/SettingsActivity.java
index e50549a9e..312b0e6c8 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/SettingsActivity.java
+++ b/app/src/main/java/com/hippo/ehviewer/ui/SettingsActivity.java
@@ -30,11 +30,9 @@ import android.view.LayoutInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
-import android.view.WindowManager;
 import android.widget.ListAdapter;
 
 import com.hippo.ehviewer.R;
-import com.hippo.ehviewer.Settings;
 import com.hippo.ehviewer.ui.fragment.AboutFragment;
 import com.hippo.ehviewer.ui.fragment.AdvancedFragment;
 import com.hippo.ehviewer.ui.fragment.DownloadFragment;
@@ -199,15 +197,4 @@ public final class SettingsActivity extends EhPreferenceActivity {
             super.onActivityResult(requestCode, resultCode, data);
         }
     }
-
-    @Override
-    protected void onResume() {
-        super.onResume();
-        if(Settings.getEnabledSecurity()){
-            getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE,
-                    WindowManager.LayoutParams.FLAG_SECURE);
-        }else{
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
-        }
-    }
 }
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/UConfigActivity.java b/app/src/main/java/com/hippo/ehviewer/ui/UConfigActivity.java
index f20a065cd..736f815da 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/UConfigActivity.java
+++ b/app/src/main/java/com/hippo/ehviewer/ui/UConfigActivity.java
@@ -32,7 +32,6 @@ import android.support.v7.app.AlertDialog;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.WindowManager;
 import android.webkit.CookieManager;
 import android.webkit.CookieSyncManager;
 import android.webkit.JsPromptResult;
@@ -44,7 +43,6 @@ import android.widget.EditText;
 import android.widget.TextView;
 import com.hippo.ehviewer.EhApplication;
 import com.hippo.ehviewer.R;
-import com.hippo.ehviewer.Settings;
 import com.hippo.ehviewer.client.EhCookieStore;
 import com.hippo.ehviewer.client.EhUrl;
 import com.hippo.widget.ProgressView;
@@ -250,15 +248,4 @@ public class UConfigActivity extends ToolbarActivity {
       return true;
     }
   }
-
-  @Override
-  protected void onResume() {
-    super.onResume();
-    if(Settings.getEnabledSecurity()){
-      getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE,
-              WindowManager.LayoutParams.FLAG_SECURE);
-    }else{
-      getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
-    }
-  }
 }