I solved this problem.
It was because of the “ionic resource” service error.
where run “ionic resource” command, I looked into and checked the /resources/android/splash folder, I clicked and open all of these png files, I found some pictures were broken(which appears as half of it).
So I replace these broken png files with the “normal” png file(at the same folder), then run “ionic build” command， the error is disappeared.