diff --git a/README.md b/README.md
index ccd851b..d9ea866 100644
--- a/README.md
+++ b/README.md
@@ -89,7 +89,7 @@ aspect to your needs though, like the arrow image, text size, text color and bac
 To do so, override the style attributes to your liking, like the following example:
 
 ``` xml
-<style name="ptr_text">
+<style name="ptr_text.custom">
         
     <!-- Change the text style and color -->
     <item name="android:textStyle">bold|italic</item>
@@ -99,11 +99,11 @@ To do so, override the style attributes to your liking, like the following examp
 
 The various styles you can override are;
 
-* ptr_headerContainer
-* ptr_header
-* ptr_arrow
-* ptr_spinner
-* ptr_text
+* ptr_headerContainer.custom
+* ptr_header.custom
+* ptr_arrow.custom
+* ptr_spinner.custom
+* ptr_text.custom
 
 The default attributes can be found in the [library project](https://github.com/erikwt/PullToRefresh-ListView/blob/master/libraryproject/res/values/default_style.xml)
 
diff --git a/sampleproject/build.gradle b/sampleproject/build.gradle
index d0298cd..300ed5f 100644
--- a/sampleproject/build.gradle
+++ b/sampleproject/build.gradle
@@ -1,4 +1,4 @@
-apply plugin: 'android-library'
+apply plugin: 'android'
 
 buildscript {
     repositories {
diff --git a/sampleproject/res/values/ptr_style.xml b/sampleproject/res/values/ptr_style.xml
index 50c6f0e..6f40b67 100644
--- a/sampleproject/res/values/ptr_style.xml
+++ b/sampleproject/res/values/ptr_style.xml
@@ -16,13 +16,13 @@
      -->
      
      <!-- Examples below, remove comment to see effect -->
-    <style name="ptr_headerContainer">
+    <style name="ptr_headerContainer.custom">
         
         <!-- Change the background color -->
         <!-- <item name="android:background">@android:color/darker_gray</item>  -->
     </style>
     
-    <style name="ptr_text">
+    <style name="ptr_text.custom">
         
         <!-- Change the text style and color -->
         <!-- <item name="android:textStyle">bold|italic</item>  -->