Add Privacy and Security Settings

app/src/main/java/com/hippo/ehviewer/ui/LicenseActivity.java

@@ -19,9 +19,11 @@ 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 {
 
@@ -59,4 +61,15 @@ 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);
+        }
+    }
 }