A screen assembly, an electronic device, and a method for manufacturing the electronic device are provided. The screen assembly includes a liquid crystal panel, a backlight module, a camera, and a light-shielding adhesive layer. The backlight module is disposed on a side of the liquid crystal panel, defines a fist through hole, and includes a plastic ring disposed in the first through hole. The camera is at least partially received in the first through hole and fixed in the first through hole via the plastic ring. The light-shielding adhesive layer is disposed between the backlight module and the liquid crystal panel. A vertical projection of the light-shielding adhesive layer on the liquid crystal panel is within a vertical projection of the plastic ring on the liquid crystal panel. The light-shielding adhesive layer is operable to prevent lights leaked from the backlight module from entering a light-incident surface of the camera.