why i get Some file crunching failed after i rename drawable file to .9.png?

Question

I am testing 9-patch image .
Before everything works fine , and i rename drawable file ic_button_beat_box_default.png to ic_button_beat_box_d

Answer 1

Rename your file again

ic_button_beat_box_default.9.png to ic_button_beat_box_default9.png because android studio takes ic_button_beat_box_default.9 instead of ic_button_beat_box_default.9.png

or another solution is add below line to your build.gradle(Module:app)

android{
 aaptOptions {cruncherEnabled = false} 
}