diff --git a/.idea/caches/gradle_models.ser b/.idea/caches/gradle_models.ser
index de34513..65743fb 100644
Binary files a/.idea/caches/gradle_models.ser and b/.idea/caches/gradle_models.ser differ
diff --git a/.idea/misc.xml b/.idea/misc.xml
index cc04cd3..51fa3e5 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -35,7 +35,7 @@
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/src/main/java/zc/neu/com/securitystorage/MainActivity.java b/app/src/main/java/zc/neu/com/securitystorage/MainActivity.java
index 7173967..b354f76 100644
--- a/app/src/main/java/zc/neu/com/securitystorage/MainActivity.java
+++ b/app/src/main/java/zc/neu/com/securitystorage/MainActivity.java
@@ -1,5 +1,6 @@
 package zc.neu.com.securitystorage;
 
+import android.content.Intent;
 import android.os.Bundle;
 import android.support.v4.view.ViewPager;
 import android.support.v7.app.ActionBar;