We are now using AppCompat and support Material

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

@@ -4,7 +4,7 @@
         Base application theme, dependent on API level. This theme is replaced
         by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
     -->
-    <style name="AppBaseTheme" parent="android:Theme.Light">
+    <style name="AppBaseTheme" parent="Theme.AppCompat.Light.DarkActionBar">
         <!--
             Theme customizations available in newer API levels can go in
             res/values-vXX/styles.xml, while customizations related to
@@ -17,7 +17,7 @@
         <!-- All customizations that are NOT specific to a particular API-level can go here. -->
     </style>
 
-    <style name="GridLayoutDataTextView" parent="android:Widget.Holo.Light.TextView">
+    <style name="GridLayoutDataTextView">
         <item name="android:textSize">12sp</item>
         <item name="android:layout_weight">1</item>
         <item name="android:ellipsize">none</item>
@@ -33,7 +33,7 @@
         <item name="android:typeface">monospace</item>
     </style>
 
-    <style name="GridLayoutTitleTextView" parent="android:Widget.Holo.Light.TextView">
+    <style name="GridLayoutTitleTextView">
         <item name="android:textSize">12sp</item>
     </style>