CircleProgressView | A simple pure circular progress bar

I copied/wrote a class that inherits from Frame

I'm new in android. I have a code which is consisted ViewPager and TabLayout. And it has 4 Fragments. On my Fragment4 code, I want to use CircleProgressView which I got in GitHub. To use that code, I should use AsyncTask. And it has "MainActivity.this.runOnUiThread(new Runnable){}". But this code occurred error. The message is "MainActivity is not an enclosing class." I think it means MainActivity class could not be referred. How can I call "MainActivity.this.runOnUiThread()"? Please tell me how to fix code.

Here is a part of my code.

I need to create something like the image below:

I need to be able to set a max value, have it count down every second until it reaches 0, display that value, and have the progress bar also move every second.

I tried a bunch of different approaches using this library: CircleProgressView, but I end up having to use a Handler and separate threads, and with the Android lifecycle keeping the threads under control is just a total nightmare.

Can this be done using shapes and an animation? I know the animated progress circle is fairly simple, but displaying that number in the middle I haven't been able to do yet.

EDIT

So I just found the library has a setValueAnimated method (RTFM).. It seems like it may solve my issue. I'm still a bit concerned the library may be more than I need, though.