Why is the ProgressView class not visible?

Question

Java

Hello! I'm trying the material
library on the Intellij idea for Android, specifically Progress . Added to build.gradle:

dependencies {
    compile 'com.github.rey5137:material:1.2.1'
}

In xml added

<com.rey.material.widget.ProgressView
            android:layout_width="match_parent"
            android:layout_height="4dp"
            app:pv_autostart="true"
            app:pv_circular="false"
            app:lpd_strokeColor="@android:color/holo_red_light"
            app:pv_progressStyle="@style/Material.Drawable.LinearProgress"
            app:pv_progressMode="indeterminate"/>

The project is building.
But I can't use ProgressView in code. Writes that the class is not found.
Why is this class not visible?
What needs to be done to make it visible in the code?
Thank you!

Answer 1

Did you add it to that build.gradle file? You may also need to sync. Check External libraries, if there are no files of this library, then you are doing something wrong. Use the sample from the github and compare what is wrong with you.

Answer 2

and also tried this: