@Override
public void onSessionFinished(final TerminalSession finishedSession) {
    if (terminalController.mTermService.getSessions().isEmpty()) {
        terminalController.currentFontSize = -1;
        if (terminalController.mTermService.mWantsToStop) {
            // The service wants to stop as soon as possible.
            terminalController.activity.finish();
            return;
        }
        terminalController.mTermService.terminateService();
    } else {
        terminalController.switchToPreviousSession();
        terminalController.mTermService.removeSession(finishedSession);
    }
}

        // THIS PRODUCES A CAST EXCEPTION SINCE THIS SERVICE IS STARTED IN A DIFFERENT PROCESS
        // THIS IS REQUIRED TO SURVIVE AN APPLICATION CRASH
        TerminalService.LocalBinder x = (TerminalService.LocalBinder) boundService;
        terminalController.mTermService = x.service;

public class TerminalService extends Service implements SessionChangedCallback {
    private final IBinder mBinder = new LocalBinder();
    @Override
    public IBinder onBind(Intent intent) {
        return mBinder;
    }
    /**
     * This service is only bound from inside the same process and never uses IPC.
     */
    public class LocalBinder extends Binder {
        public final TerminalService service = TerminalService.this;
    }
}

    /** Callback to be invoked when a {@link TerminalSession} changes. */
    public interface SessionChangedCallback {
        void onTextChanged(TerminalSession changedSession);
        void onTitleChanged(TerminalSession changedSession);
        void onSessionFinished(TerminalSession finishedSession);
        void onClipboardText(TerminalSession session, String text);
        void onBell(TerminalSession session);
        void onColorsChanged(TerminalSession session);
    }