I have seen a lot of tutorials and video on How to make a custom progress bar. They show only by changing the color, the style or the elements. No one shows with a runnable picture.
I don't understand that how developers match their progress with the custom view or how they make a picture's part runnable.
Think of a circle view and it runs just like a progress.
But how?
Or how can I define the part which I want to run with the java code?
Please don't pass way the question. I am very very much interested to know and to implement it.