5.1

app/src/main/AndroidManifest.xml

@@ -101,7 +101,7 @@
         </activity>
 
         <activity android:name=".tuils.tutorial.TutorialActivity"
-            android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
+            android:theme="@style/Theme.AppCompat.Light.NoActionBar.FullScreen"
             android:windowSoftInputMode="stateAlwaysHidden">
             <meta-data
                 android:name="android.support.PARENT_ACTIVITY"

app/src/main/res/values/styles.xml

 <resources xmlns:android="http://schemas.android.com/apk/res/android">
 
     <style name="Custom.Solid" parent="android:Theme.Light.NoTitleBar" />
-    <style name="Custom.Solid.Fullscreen" parent="android:Theme.Light.NoTitleBar.Fullscreen" />
-
     <style name="Custom.SystemWP" parent="android:Theme.Wallpaper.NoTitleBar" />
-    <style name="Custom.SystemWP.Fullscreen" parent="android:Theme.Wallpaper.NoTitleBar.Fullscreen" />
+
+    <style name="Theme.AppCompat.Light.NoActionBar.FullScreen" parent="@style/Theme.AppCompat.Light">
+        <item name="windowNoTitle">true</item>
+        <item name="windowActionBar">false</item>
+        <item name="android:windowFullscreen">true</item>
+        <item name="android:windowContentOverlay">@null</item>
+    </style>
 
     <style name="ToolsBar">
         <item name="android:layout_width">0dp</item>