Hi guys,
I prepared a tutorial on how to build an Android app that runs the OpenCV's DNN module. It is for demonstration/educational purposes. Basically it is OpenCV's tutorial on DNN (http://docs.opencv.org/master/d5/de7/tutorial_dnn_googlenet.html#gsc.tab=0).
Alternatively, you can import the project to you Android Studio and modify accordingly your file paths.
Here is the source code and tutorial: https://github.com/alexkarargyris/Caffe_OpenCV_Android_App
Best, Alex