What does android:progressTintMode, android:secondaryProgressTintMode and android:progressDrawable do?

Question

I am making a custom ProgressBar. How does android:progressTintMode and android:secondaryProgressTintMode effect the look of the Progress Bar?
I looked into the docs but couldn't understand.
Also how does android:progressDrawable effect the Progress Bar?

Answer 1

the progressDrawable defines the shape and color of the progress bar, then the progressTintMode defines how the progress bar will fill up.

EG if you want to have a progress bar with rounded corners, then the progressDrawable will define the shape with rounded corners. You would then use "src_in" as the progressTintMode so it will only fill up within the shape.