Handling unix signals in Android
It seems this is not really possible. The best solution available would be to add a shut down hook and "gracefully" restart the application, as described here:
EDIT:
I needed this because (back then) I had JNI code on which I opened a FD and r/w to it. The FD was opened to a named socket (a Unix pipe), and when the remote side of the pipe (in my case a daemon, or Android C/service) closes the connection (or dies), your side will get a signal. This is not always nice. IMHO the best to handle this should be using a signal handler from good old plain-C code, and just swallow it (otherwise - you should notify the Java side of your app).