MPChartExample/res/drawable/new_background.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <stroke
        android:width="2dp"
        android:color="#FA6185" />

    <solid android:color="#FA6185" />
    <corners android:radius="5dp" />
</shape>