numAndroidPageCurlEffect library is used to make page curl effect for images in Android. In this library, only canvas has been used so that it can be used in any Android version application. The numAndroidPageCurlEffect library is inspired by android-page-curl repositiory
You should follow Page Curl Effect using numAndroidPageCurlEffect library in Android Tutorial for the documentaion of numAndroidPageCurlEffect library.