CustomView or Canvas Draw

https://programmer.help/blogs/android-custom-view-tool-paint-canvas-1.html

https://stackoverflow.com/questions/60232560/sweepgradient-android-how-to-set-start-angle-for-gradient

https://stackoverflow.com/questions/9037108/android-how-to-draw-an-arc-based-gradient

Animation of view draw line with slow animation

https://proandroiddev.com/android-bring-life-to-your-custom-view-8604ab3967b3

https://stackoverflow.com/questions/47655960/how-to-do-canvas-path-animation

https://stackoverflow.com/questions/18616035/how-to-animate-a-path-on-canvas-android

https://stackoverflow.com/questions/12037709/how-to-draw-a-path-on-an-android-canvas-with-animation

https://github.com/Audhil/GraduallyLinearLineGrowth/blob/master/src/com/wordpress/smdaudhilbe/view/GradualGrowingLine.java

https://www.programcreek.com/java-api-examples/?class=android.animation.ValueAnimator&method=ofInt

https://www.programcreek.com/java-api-examples/?code=Brave-wan/SmartRefresh/SmartRefresh-master/refresh-layout/src/main/java/com/scwang/smartrefresh/layout/header/bezierradar/RoundProgressView.java

View at Medium.com

https://github.com/developer-shivam/PentagonFloatingActionButton/blob/master/app/src/main/java/developer/shivam/lifesumfloatingactionbutton/MainActivity.java

https://riptutorial.com/android/example/15665/valueanimator

https://android.developreference.com/article/11136617/How+to+draw+equidistant+dashes+using+DashPathEffect

https://stackoverflow.com/Questions/6103713/how-do-i-make-a-dotted-dashed-line-in-android

View at Medium.com

http://useof.org/java-open-source/android.graphics.DashPathEffect