This project has been tested on the android emulator and a Nexus 7, nothing else. The emulator worked fine at 8000 samples a second, the Nexus at 8000, 11025, 16000, 22050 and 44100. The apk may be found on F-Droid.
To import this project into the Android ADT you will need to add a .project file here. The easiest way to do that is to copy one from another project and edit the
<projectDescription>
<name>Tuner</name>line to change the name. Or create a new project and copy all the files.
If you want to use the Android SDK, you will need to enter
android update project -p <project folder>
from the command line or terminal substituting the project's folder for . Then build it with ant. I don't understand ant, so I'm not going there.