Hello , thanks for your librery.
I am trying to add a plain-pie on an RecycleView but is not is not showed after run the proyect either on the xml preview.
<?xml version="1.0" encoding="utf-8"?>
<layout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:plainpie="http://schemas.android.com/tools">
<android.support.v7.widget.CardView
android:id="@+id/card_tech"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="@dimen/standard_margin"
android:layout_marginLeft="@dimen/standard_margin"
android:layout_marginRight="@dimen/standard_margin"
card_view:cardCornerRadius="4dp"
card_view:cardBackgroundColor="@color/primary_light">
<az.plainpie.PieView
android:id="@+id/pieView"
android:layout_marginTop="10dp"
android:layout_width="200dp"
android:layout_height="200dp"
plainpie:percentage="75"
plainpie:percentage_size="70"
plainpie:inner_text_visibility="true"
android:layout_gravity="center"/>
</android.support.v7.widget.CardView>
</layout>