To be honest, I had a difficult time trying to understand what exactly is device independent pixel (dp). Finally, I have learned that 160dp = 1 inch, it is physical length.
I have created this app to compare the pixels and device independent pixels on one's device: https://play.google.com/store/apps/details?id=com.xizz.androidpixels&hl=en.
To download the original code: Device Independent Pixels
