diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 8ab3e2f..e4450fe 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -41,8 +41,7 @@
         <activity
                 android:name=".activity.MainActivity"
                 android:label="@string/app_name"
-                android:launchMode="singleTask"
-                android:theme="@style/AppTheme.NoActionBar">
+                android:launchMode="singleTask">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
 
diff --git a/app/src/main/java/org/itxtech/daedalus/Daedalus.java b/app/src/main/java/org/itxtech/daedalus/Daedalus.java
index 86e6c16..530d1df 100644
--- a/app/src/main/java/org/itxtech/daedalus/Daedalus.java
+++ b/app/src/main/java/org/itxtech/daedalus/Daedalus.java
@@ -23,6 +23,14 @@ public class Daedalus extends Application {
         add(new DnsServer("2", "123.206.61.167", R.string.server_south_china));
     }};
 
+    public static final String[] DEFAULT_TEST_DOMAINS = new String[]{
+            "google.com",
+            "twitter.com",
+            "youtube.com",
+            "facebook.com",
+            "wikipedia.org"
+    };
+
     private static Daedalus instance = null;
 
     @Override
diff --git a/app/src/main/java/org/itxtech/daedalus/activity/MainActivity.java b/app/src/main/java/org/itxtech/daedalus/activity/MainActivity.java
index 88e3b7c..77506e6 100644
--- a/app/src/main/java/org/itxtech/daedalus/activity/MainActivity.java
+++ b/app/src/main/java/org/itxtech/daedalus/activity/MainActivity.java
@@ -10,7 +10,6 @@ import android.os.Bundle;
 import android.preference.PreferenceManager;
 import android.support.design.widget.FloatingActionButton;
 import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.Toolbar;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -46,8 +45,8 @@ public class MainActivity extends AppCompatActivity {
         initConfig();
 
         setContentView(R.layout.activity_main);
-        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
-        setSupportActionBar(toolbar);
+        /*Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);*/
 
         FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
         fab.setOnClickListener(new View.OnClickListener() {
diff --git a/app/src/main/java/org/itxtech/daedalus/activity/ServerTestActivity.java b/app/src/main/java/org/itxtech/daedalus/activity/ServerTestActivity.java
index c77e0f6..ec22bc2 100644
--- a/app/src/main/java/org/itxtech/daedalus/activity/ServerTestActivity.java
+++ b/app/src/main/java/org/itxtech/daedalus/activity/ServerTestActivity.java
@@ -16,6 +16,7 @@ import de.measite.minidns.Question;
 import de.measite.minidns.Record;
 import de.measite.minidns.record.A;
 import de.measite.minidns.util.InetAddressUtil;
+import org.itxtech.daedalus.Daedalus;
 import org.itxtech.daedalus.R;
 import org.itxtech.daedalus.util.DnsServer;
 
@@ -53,7 +54,7 @@ public class ServerTestActivity extends AppCompatActivity {
         spinnerServerChoice.setAdapter(spinnerArrayAdapter);
 
         final AutoCompleteTextView textViewTestUrl = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView_test_url);
-        ArrayAdapter autoCompleteArrayAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, getResources().getStringArray(R.array.default_test_urls));
+        ArrayAdapter autoCompleteArrayAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, Daedalus.DEFAULT_TEST_DOMAINS);
         textViewTestUrl.setAdapter(autoCompleteArrayAdapter);
 
         final Context context = this;
@@ -78,7 +79,7 @@ public class ServerTestActivity extends AppCompatActivity {
                             try {
                                 String testUrl = textViewTestUrl.getText().toString();
                                 if (testUrl.equals("")) {
-                                    testUrl = getResources().getStringArray(R.array.default_test_urls)[0];
+                                    testUrl = Daedalus.DEFAULT_TEST_DOMAINS[0];
                                 }
                                 String testText = "";
                                 String[] dnsServers = {DnsServer.getDnsServerAddressByStringDesription(context, spinnerServerChoice.getSelectedItem().toString()), "114.114.114.114", "8.8.8.8"};
diff --git a/app/src/main/java/org/itxtech/daedalus/view/ClickPreference.java b/app/src/main/java/org/itxtech/daedalus/view/ClickPreference.java
index 4d4c307..e8c7b67 100644
--- a/app/src/main/java/org/itxtech/daedalus/view/ClickPreference.java
+++ b/app/src/main/java/org/itxtech/daedalus/view/ClickPreference.java
@@ -5,7 +5,14 @@ import android.preference.ListPreference;
 import android.util.AttributeSet;
 
 /**
- * @author PeratX
+ * Daedalus Project
+ *
+ * @author iTXTech
+ * @link https://itxtech.org
+ * <p>
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
  */
 public class ClickPreference extends ListPreference {
 
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 4321e69..c40a19c 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -8,20 +8,6 @@
         android:fitsSystemWindows="true"
         tools:context="org.itxtech.daedalus.activity.MainActivity">
 
-    <android.support.design.widget.AppBarLayout
-            android:layout_height="wrap_content"
-            android:layout_width="match_parent"
-            android:theme="@style/AppTheme.AppBarOverlay">
-
-        <android.support.v7.widget.Toolbar
-                android:id="@+id/toolbar"
-                android:layout_width="match_parent"
-                android:layout_height="?attr/actionBarSize"
-                android:background="?attr/colorPrimary"
-                app:popupTheme="@style/AppTheme.PopupOverlay"/>
-
-    </android.support.design.widget.AppBarLayout>
-
     <android.support.design.widget.FloatingActionButton
             android:id="@+id/fab"
             android:layout_width="wrap_content"
diff --git a/app/src/main/res/values/array.xml b/app/src/main/res/values/array.xml
deleted file mode 100644
index 6916e82..0000000
--- a/app/src/main/res/values/array.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<resources>
-    <string-array name="default_test_urls">
-        <item>google.com</item>
-        <item>twitter.com</item>
-        <item>youtube.com</item>
-        <item>facebook.com</item>
-        <item>wikipedia.org</item>
-    </string-array>
-</resources>
\ No newline at end of file