I examined past threads.
I noticed that the following two threads are similar to my phenomenon.
https://community.pix4d.com/t/5807-Issues-with-Galaxy-tab-2#gsc.tab=0
https://community.pix4d.com/t/5777-pix4d-is-stopped-taking-pictures#gsc.tab=0
Android v3.5.0 contains problems and will be fixed in the next version?