dmill, I figured it out.
String btmac = getMyPrefs("btaddr");
ShellExec cmd = new ShellExec();
ShellExec.CommandResult cmdRes = cmd.su.runWaitFor("sdptool search DUN --bdaddr " + btmac);
StringBuilder out = new StringBuilder()...
dmill, did you ever figure out how to get that code to output the command output instead of the process id? If so, could you post your solution? If not, thanks for at least helping me get on the right track with kevin@teslacoilsw's code.