9-patch image error in Android

Question

Whenever I try to add a 9-patch image to the \\drawable folder in my project, I get the same error:

ERROR: 9-patch image C:\\...\\res\\drawable\         


        

Answer 1

In my case I mistakenly extended the black border into the top left corner. Make sure the corners are transparent.

Answer 2

I found the issue is about *.9.png files. Open and check all your 9-Patch files, make sure that all files have black 1 pixel wide border, if don't have, just click the white place and add it, then save it.

It's the only solution to my problem.