Why is the image not showing in the fragment?

Question

Android

I understand with fragments means. I created the first fragment with two buttons and adding it to the main activity_layout during the demonstration, these two buttons were visible, I created the same fragment with a picture with a different name, but adding this fragment to the activity_layout, the picture was not visible during the demonstration. The most interesting thing is that the picture is visible in Design mode, but not in the emulator..