diff --git a/.idea/misc.xml b/.idea/misc.xml
index b0a270f5..39638799 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,8 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="EntryPointsManager">
-    <entry_points version="2.0" />
-  </component>
   <component name="NullableNotNullManager">
     <option name="myDefaultNullable" value="android.support.annotation.Nullable" />
     <option name="myDefaultNotNull" value="android.support.annotation.NonNull" />
@@ -27,7 +24,7 @@
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" assert-keyword="true" jdk-15="true" 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/app.iml b/app/app.iml
index 1cdca55a..afb3fc49 100644
--- a/app/app.iml
+++ b/app/app.iml
@@ -22,25 +22,26 @@
       </configuration>
     </facet>
   </component>
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7" inherit-compiler-output="false">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7">
     <output url="file://$MODULE_DIR$/build/intermediates/classes/debug" />
     <output-test url="file://$MODULE_DIR$/build/intermediates/classes/test/debug" />
     <exclude-output />
     <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/apt/debug" isTestSource="false" generated="true" />
       <sourceFolder url="file://$MODULE_DIR$/build/generated/source/r/debug" isTestSource="false" generated="true" />
       <sourceFolder url="file://$MODULE_DIR$/build/generated/source/aidl/debug" isTestSource="false" generated="true" />
       <sourceFolder url="file://$MODULE_DIR$/build/generated/source/buildConfig/debug" isTestSource="false" generated="true" />
       <sourceFolder url="file://$MODULE_DIR$/build/generated/source/rs/debug" isTestSource="false" generated="true" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/apt/debug" isTestSource="false" generated="true" />
       <sourceFolder url="file://$MODULE_DIR$/build/generated/res/rs/debug" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/build/generated/res/resValues/debug" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/apt/androidTest/debug" isTestSource="true" generated="true" />
       <sourceFolder url="file://$MODULE_DIR$/build/generated/source/r/androidTest/debug" isTestSource="true" generated="true" />
       <sourceFolder url="file://$MODULE_DIR$/build/generated/source/aidl/androidTest/debug" isTestSource="true" generated="true" />
       <sourceFolder url="file://$MODULE_DIR$/build/generated/source/buildConfig/androidTest/debug" isTestSource="true" generated="true" />
       <sourceFolder url="file://$MODULE_DIR$/build/generated/source/rs/androidTest/debug" isTestSource="true" generated="true" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/apt/androidTest/debug" isTestSource="true" generated="true" />
       <sourceFolder url="file://$MODULE_DIR$/build/generated/res/rs/androidTest/debug" type="java-test-resource" />
       <sourceFolder url="file://$MODULE_DIR$/build/generated/res/resValues/androidTest/debug" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/apt/test/debug" isTestSource="true" generated="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/debug/res" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/debug/resources" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/debug/assets" type="java-resource" />
@@ -55,6 +56,13 @@
       <sourceFolder url="file://$MODULE_DIR$/src/testDebug/java" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/testDebug/rs" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/testDebug/shaders" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTestDebug/res" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTestDebug/resources" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTestDebug/assets" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTestDebug/aidl" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTestDebug/java" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTestDebug/rs" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTestDebug/shaders" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/main/res" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/main/assets" type="java-resource" />
@@ -78,28 +86,18 @@
       <sourceFolder url="file://$MODULE_DIR$/src/test/shaders" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/assets" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/blame" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/builds" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/bundles" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/check-manifest" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/classes" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dependency-cache" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dex" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental-classes" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental-runtime-classes" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental-safeguard" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental-verifier" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/instant-run-resources" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/instant-run-support" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/javaPrecompile" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/jniLibs" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/lint" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/manifests" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/ndk" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/pre-dexed" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/reload-dex" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/prebuild" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/res" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/restart-dex" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/rs" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/shaders" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/split-apk" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/splits-support" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/symbols" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/tmp" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/transforms" />
@@ -108,13 +106,14 @@
     </content>
     <orderEntry type="jdk" jdkName="Android API 21 Platform" jdkType="Android SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" exported="" name="appcompat-v7-21.0.3" level="project" />
-    <orderEntry type="library" exported="" name="library-2.4.0" level="project" />
-    <orderEntry type="library" exported="" name="floatingactionbutton-1.1.0" level="project" />
-    <orderEntry type="library" exported="" name="library-1.0.6" level="project" />
-    <orderEntry type="library" exported="" name="recyclerview-v7-21.0.3" level="project" />
-    <orderEntry type="library" exported="" name="support-v4-21.0.3" level="project" />
-    <orderEntry type="library" exported="" name="support-annotations-21.0.3" level="project" />
-    <orderEntry type="library" exported="" name="cardview-v7-21.0.3" level="project" />
+    <orderEntry type="library" name="com.android.support:recyclerview-v7-21.0.3" level="project" />
+    <orderEntry type="library" name="com.nineoldandroids:library:2.4.0@jar" level="project" />
+    <orderEntry type="library" name="com.android.support:appcompat-v7-21.0.3" level="project" />
+    <orderEntry type="library" name="com.android.support:cardview-v7-21.0.3" level="project" />
+    <orderEntry type="library" name="com.android.support:support-v4-21.0.3" level="project" />
+    <orderEntry type="library" name="com.melnykov:floatingactionbutton-1.1.0" level="project" />
+    <orderEntry type="library" name="com.android.support:support-annotations:21.0.3@jar" level="project" />
+    <orderEntry type="library" name="com.jpardogo.materialtabstrip:library-1.0.6" level="project" />
+    <orderEntry type="library" name="android-android-21" level="project" />
   </component>
 </module>
\ No newline at end of file
diff --git a/app/build.gradle b/app/build.gradle
index ae3d3494..8905e72c 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -2,7 +2,7 @@ apply plugin: 'com.android.application'
 
 android {
     compileSdkVersion 21
-    buildToolsVersion '25.0.0'
+    buildToolsVersion '26.0.2'
 
     defaultConfig {
         applicationId "com.danielkim.soundrecorder"
diff --git a/app/src/main/java/com/danielkim/soundrecorder/activities/MainActivity.java b/app/src/main/java/com/danielkim/soundrecorder/activities/MainActivity.java
index a2e6bde7..a61050cf 100644
--- a/app/src/main/java/com/danielkim/soundrecorder/activities/MainActivity.java
+++ b/app/src/main/java/com/danielkim/soundrecorder/activities/MainActivity.java
@@ -62,6 +62,12 @@ public boolean onOptionsItemSelected(MenuItem item) {
                 Intent i = new Intent(this, SettingsActivity.class);
                 startActivity(i);
                 return true;
+            case R.id.exit_setting:
+                Intent intent = new Intent(Intent.ACTION_MAIN);
+                intent.addCategory(Intent.CATEGORY_HOME);
+                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                startActivity(intent);
+                return true;
             default:
                 return super.onOptionsItemSelected(item);
         }
diff --git a/app/src/main/res/menu/menu_main.xml b/app/src/main/res/menu/menu_main.xml
index bbf51a05..4f96a2fb 100644
--- a/app/src/main/res/menu/menu_main.xml
+++ b/app/src/main/res/menu/menu_main.xml
@@ -7,4 +7,8 @@
         android:id="@+id/action_settings"
         android:orderInCategory="101"
         android:title="@string/action_settings" />
+    <item
+        android:id="@+id/exit_setting"
+        android:orderInCategory="101"
+        android:title="@string/exit_settings" />
 </menu>
diff --git a/app/src/main/res/values-cs/strings.xml b/app/src/main/res/values-cs/strings.xml
index 525548c0..af1bd563 100644
--- a/app/src/main/res/values-cs/strings.xml
+++ b/app/src/main/res/values-cs/strings.xml
@@ -5,6 +5,7 @@
     <string name="app_name">Záznam zvuku</string>
     <string name="action_licenses">Licence</string>
     <string name="action_settings">Nastavení</string>
+    <string name="exit_settings">Výstup</string>
     <string name="tab_title_record">Záznam</string>
     <string name="tab_title_saved_recordings">Uložené nahrávky</string>
 
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 5e0d1f0f..605f37ad 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -5,6 +5,7 @@
     <string name="app_name">Sound Recorder</string>
     <string name="action_licenses">Lizenzen</string>
     <string name="action_settings">Einstellungen</string>
+    <string name="exit_settings">Ausgang</string>
     <string name="tab_title_record">Aufnehmen</string>
     <string name="tab_title_saved_recordings">Gespeicherte Aufnahmen</string>
 
diff --git a/app/src/main/res/values-eo/strings.xml b/app/src/main/res/values-eo/strings.xml
index 5c2f55c1..336f74ec 100644
--- a/app/src/main/res/values-eo/strings.xml
+++ b/app/src/main/res/values-eo/strings.xml
@@ -5,6 +5,7 @@
     <string name="app_name">Sonregistrilo</string>
     <string name="action_licenses">Permesiloj</string>
     <string name="action_settings">Agordoj</string>
+    <string name="exit_settings">Setting</string>
     <string name="tab_title_record">Registri</string>
     <string name="tab_title_saved_recordings">Konservataj registraĵoj</string>
 
diff --git a/app/src/main/res/values-es/strings.xml b/app/src/main/res/values-es/strings.xml
index 465df114..12856564 100644
--- a/app/src/main/res/values-es/strings.xml
+++ b/app/src/main/res/values-es/strings.xml
@@ -5,6 +5,7 @@
     <string name="app_name">Sound Recorder</string>
     <string name="action_licenses">Licencias</string>
     <string name="action_settings">Ajustes</string>
+    <string name="exit_settings">Salida</string>
     <string name="tab_title_record">Grabar</string>
     <string name="tab_title_saved_recordings">Guardar grabaciones</string>
 
diff --git a/app/src/main/res/values-fi/strings.xml b/app/src/main/res/values-fi/strings.xml
index 06c54247..c6bd23ef 100644
--- a/app/src/main/res/values-fi/strings.xml
+++ b/app/src/main/res/values-fi/strings.xml
@@ -5,6 +5,7 @@
     <string name="app_name">Nauhuri</string>
     <string name="action_licenses">Lisenssit</string>
     <string name="action_settings">Asetukset</string>
+    <string name="exit_settings">poistuminen</string>
     <string name="tab_title_record">Äänitä</string>
     <string name="tab_title_saved_recordings">Tallennetut äänitykset</string>
 
diff --git a/app/src/main/res/values-fr/strings.xml b/app/src/main/res/values-fr/strings.xml
index 882fb9f3..b69705fa 100644
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@@ -5,6 +5,7 @@
     <string name="app_name">Sound Recorder</string>
     <string name="action_licenses">Licenses</string>
     <string name="action_settings">Paramètres</string>
+    <string name="exit_settings">Quitter</string>
     <string name="tab_title_record">Enregistrer</string>
     <string name="tab_title_saved_recordings">Enregistrements</string>
 
diff --git a/app/src/main/res/values-he/strings.xml b/app/src/main/res/values-he/strings.xml
index e9f7930e..ea2e5e82 100644
--- a/app/src/main/res/values-he/strings.xml
+++ b/app/src/main/res/values-he/strings.xml
@@ -5,6 +5,7 @@
     <string name="app_name">Sound Recorder</string>
     <string name="action_licenses">רשיונות</string>
     <string name="action_settings">הגדרות</string>
+    <string name="exit_settings">יְצִיאָה</string>
     <string name="tab_title_record">הקלטה</string>
     <string name="tab_title_saved_recordings">הקלטות שמורות</string>
 
diff --git a/app/src/main/res/values-it/strings.xml b/app/src/main/res/values-it/strings.xml
index 15fafc5b..63a5ad23 100644
--- a/app/src/main/res/values-it/strings.xml
+++ b/app/src/main/res/values-it/strings.xml
@@ -5,6 +5,7 @@
     <string name="app_name">Registratore suoni</string>
     <string name="action_licenses">Licenze</string>
     <string name="action_settings">Impostazioni</string>
+    <string name="exit_settings">Uscita</string>
     <string name="tab_title_record">Registra</string>
     <string name="tab_title_saved_recordings">Registrazioni salvate</string>
 
diff --git a/app/src/main/res/values-lt/strings.xml b/app/src/main/res/values-lt/strings.xml
index 49be7462..7867e7fb 100644
--- a/app/src/main/res/values-lt/strings.xml
+++ b/app/src/main/res/values-lt/strings.xml
@@ -5,6 +5,7 @@
     <string name="app_name">Garso įrašytuvas</string>
     <string name="action_licenses">Licenzijos</string>
     <string name="action_settings">Nustatymai</string>
+    <string name="exit_settings">Išeiti</string>
     <string name="tab_title_record">Įrašyti</string>
     <string name="tab_title_saved_recordings">Išsaugoti įrašai</string>
 
diff --git a/app/src/main/res/values-ru/strings.xml b/app/src/main/res/values-ru/strings.xml
index cd42ebf7..11b7ac82 100644
--- a/app/src/main/res/values-ru/strings.xml
+++ b/app/src/main/res/values-ru/strings.xml
@@ -4,6 +4,7 @@
     <!-- Toolbar -->
     <string name="app_name">Sound Recorder</string>
     <string name="action_licenses">Лицензии</string>
+    <string name="exit_settings">Выход</string>
     <string name="tab_title_saved_recordings">Сохраненные</string>
 
     <!-- Toasts -->
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 5061b9dc..4b5085a2 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -7,6 +7,7 @@
     <string name="app_name">Sound Recorder</string>
     <string name="action_licenses">Licenses</string>
     <string name="action_settings">Settings</string>
+    <string name="exit_settings">Exit</string>
     <string name="tab_title_record">Record</string>
     <string name="tab_title_saved_recordings">Saved Recordings</string>
 
diff --git a/build.gradle b/build.gradle
index ea98e44f..fe8a6707 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,9 +3,13 @@
 buildscript {
     repositories {
         jcenter()
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.2'
+        classpath 'com.android.tools.build:gradle:3.0.0-rc2'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -15,5 +19,9 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
     }
 }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index b111db67..78e26130 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Mon May 22 14:33:42 EDT 2017
+#Fri Dec 01 16:03:18 GMT+01:00 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip