Unable to fine Screen change area information

i am searching API that will give me update Rectangle that are change in UI of android , i dont want to copy whole screen shoot , want to capture only the area that is change, how can i doo that

The issue names no file, test, or entry point. Start by identifying the Android sample and screen-capture path involved, then determine whether the requested changed-rectangle information is supported. Done means establishing a concrete, documented approach that avoids copying the whole screenshot.

Written by the indexing model from the issue text.