The Mobile Vision API has detectors that let you find objects in photos and video.
The Mobile Vision API provides a framework for finding objects in photos and video. The framework includes detectors, which locate and describe visual objects in images or video frames, and an event driven API that tracks the position of those objects in video.
Currently, the Mobile Vision API includes face, barcode, and text detectors, which can be applied separately or together.
https://developers.google.com/vision/introduction
https://developers.google.com/vision/android/getting-started