The Midlife Geek

Ramblings of a middle aged engineer, runner and open source enthusiast

Tag: Open Source

Secure Android Development, project preparation, a cold and a new year

It’s been a mixed start to the new year. Watching what I eat for the rest of January, damn you Christmas. Back at work after three weeks off, achieved nothing and left by eleven. My ego got the better of me and I went for a run despite having a cold, so am now suffering. Need to shift it with the first cross country league race on Wednesday. I can’t help wondering why generic medicines are so much cheaper than brand names.

Finally got around to ordering a replacement Acer V3-112P screen. Replacement was straight forward. Like most avionics technicians, I breathed a sigh of relief when the LED panel lit up proving the fault. The old girl is now sitting running a million updates courtesy of Microsoft.

While many Linux advocates eschew Microsoft, I prefer Office (Home Use Program). Like current, I take the path of least resistance and I use Word and Excel so often I know them inside out. Linux is an outstanding development platform, I’m using it for TM470.

TM470 project preparation continues, reviewing both TM353 and TM354. FutureLearn is a fantastic resource with a course on Secure Android Development. Delivered by the University of Southampton, it started last week. I haven’t decided the tool chain yet, particularly versioning. I have used SVN and Bazaar, which I prefer as it integrates well with Launch Pad. I won’t be using LP though so should investigate Mercurial and Git.

Read Original Sin too – best Marvel I’ve read in ages. Like Murder She Wrote in space. A real page turner, I read it in one sitting.

Something that didn’t grip me was the Assassin’s Creed movie. It starts off quite well, with a similar story to the games. It suffers the same problem as earlier games though – the present interrupts more interesting stories in the past. What I don’t get though is why option a game as a property then try not to appeal to that market?

What I haven’t made time for though is the Nintendo Classic Mini. I played a little Ghosts ‘n Goblins – damn I forgot how hard games were then. I always thought as a kid that I’d somehow be better at them as an adult but I guess I didn’t factor in reactions.

Install Android Studio on Ubuntu

Android Studio is a great development environment and is available on Ubuntu. I’m using Ubuntu Mate 16.10 “Yakkety Yak”.
 
First install a Java Development Kit (JDK). OpenJDK is pre-installed or you can use Oracle Java 8 (there is a great guide here). I don’t wish to argue over your choice – I need to use the latter (my tutor does). Download Android Studio here. – I extracted it to /opt; ran the installer; and used my home folder for the SDK. If you are using 64 bit, you need the 32 bit GNU standard C++ library:
sudo apt install lib32stdc++6

For Arch you need to enable “multilib” repository:

<code><span class="pln">sudo pacman </span><span class="pun">-</span><span class="typ">Syu</span> <span class="pun">&amp;&amp;</span><span class="pln"> sudo pacman </span><span class="pun">-</span><span class="pln">S multilib</span><span class="pun">/</span><span class="pln">lib32</span><span class="pun">-</span><span class="pln">libstdc</span><span class="pun">++</span><span class="lit">5</span><span class="pln"> multilib</span><span class="pun">/</span><span class="pln">lib32</span><span class="pun">-</span><span class="pln">zlib</span></code>

Virtualisation support is interesting. I read two tutorial and Google’s guide. The former makes reference to command line options not in version 2.2.2. These posts suggest this is a bug, but it may now be default behaviour. First enable that virtualisation in BIOS (check if enabled using “kvm-ok”).

sudo apt-get install qemu-kvm libvirt-bin ubuntu-vm-builder bridge-utils
sudo adduser dougie kvm
sudo adduser dougie libvirtd

This results in an error.
screenshot-at-2016-11-25-21-16-19

Using the system version of libstdc++.so.6 works. Add the following to /etc/environment:

ANDROID_EMULATOR_USE_SYSTEM_LIBS=1

It seems snappy but with no feedback I’m unsure if accelerated.

So I now have a development environment set up for my project. The next hurdle is to choose a title. So far it is a: development project; distributed application; and uses Android.

Developing concurrent distributed systems (M362)

I’ve just started this Open University module. From the module description’s computing requirements:

If you have an Apple Mac or Linux computer – please note that you can only use it for this course by running Windows on it using Boot Camp or a similar dual-boot system.

I started with the OU in 2008 and it’s good to see things have changed – back then it wouldn’t have mentioned Linux at all.

Joking aside things are changing. Algorithms, data structures and computability (M269), which I’m taking concurrently, has Linux software available with instructions on how to install and configure. I can understand why M362 staff would want specific versions of NetBeans and the JDK installed – the forums are already filling up with questions about various incompatibilities and conflicts and that’s just with Windows.

Fortunately the University has a Dreamspark Premium membership – so I was able to download Windows XP and a license key to install in a VirtualBox instance.

I hope we continue to see progress with regards to platform neutrality – I’d like to spend more time learning computer science and mathematics and less time worrying about my choice of operating system.

Well that’s a shame

From Sourceforge’s blog (emphasis mine):

Thanks to DevShare, we are now able to offer a bundle program that is fully compliant with Google’s strictest policies. This includes a solid compliance process for both open source applications and third party offerings. The whole installation flow is clean and has no misleading steps. Uninstallation procedures are exhaustively documented and all applications are verified to be virus and malware free.

I notice the linked example, Filezilla, has a clearly labelled download button with the file name on it. Except you’re actually downloading a completely different file name. Continue reading

Developing a developer

Still some way to completing my degree part-time (at the end of this academic year I’m half way). I’m not soliciting my services – just looking for advice from the community and if anyone has a few minutes it’d be very much appreciated.

I enjoy mathematics and programming, my degree modules have revolved around the two, covering Java and VB.Net (its a very Windows centric place the Open University but it’s getting better). I’m in the UK and would like to go back to Edinburgh for family reasons when I leave the services in a couple of years time. Looking at the job boards, there’s a lot of Java contracts in the area.

Has anyone got a job with only open source experience? Does anyone know of any open source projects that are Java based and would be a good starting point to build on the fundamentals? Are there other qualifications or courses that you recommend? What are employers looking for? Does anyone work in a specific field that utilises both maths and programming? Is there a language that is in particular demand or do you find that good experience is more value? What’s a realistic starting salary?

Exploring Psychology

The course material for DSE 212 just arrived. Once I’d got over the weight of the package, I opened it to discover that it consists of a number of large text books, a couple of DVD, CDs, software and the usual assorted paraphernalia – part threes, course updates and errata. Looking over the course material, it seems well structured and nicely presented. The study calendar would suggest that this is going to be intensive, with the first TMA due on the 11th November.

If you’re still reading – you might wonder what this has to do with Ubuntu. Well it comes down to the course software – a large part of the course is centred around the data mining software SPSS. Now of course you might well suggest free alternatives such as R or PSPP, indeed PSPP is intended as a replacement and is very similar. It’s not the same however and the big difference is that the course material is geared to step by step work in SPSS version 14.

The version is important, from what I can ascertain – SPSS version 17 is available for Linux. IBM has acquired the company so this may well continue. That said, version 14 is what has been supplied. This is not uncommon with the OU – MST121 for example uses Mathcad 2000.

Now, how about running in Wine you might say – the software has a little license validation applet that doesn’t seem to agree with Wine but I might be doing it wrong. However, for many studying is already expensive – why should it also involve complicating installation?

It has been suggested the Open University is not at all open to open source software. I don’t know if this is a policy or not but I do know that the Windows based software they supply is outdated. I can understand that this is probably for the same reason that Linux is not supported – that it would mean making substantial changes to the course material.

Course tutors I have spoken to have been extremely favourable to the idea of packaging software for Ubuntu and distributing it with course material. There are issues here, licensing and maintaining spring to mind – no to mention support. There is no way the OU Computing Helpdesk are going to support Ubuntu so that leaves the community.

Where does one draw the line between the desire to use open source software and the ease of using a provided solution? Am I putting myself at a disadvantage to my peers? Although I am confident with statistics, I’m effectively learning two systems as the course teaches one and I apply it to another system. Even if this entails five minutes an assessment, it’s five minutes that Windows users are excused. Moreover I’ve paid for it through course fees, can I get that refunded?

What surprises me is that the OU is about accessibility – anyone can study with them, except it would seem those who choose not to use Windows. Shouldn’t the Open University be Open?

What was your favourite comment in OpenWeek?

I’ve been trying to get to as much of OpenWeek as I could and have really enjoyed a lot of the sessions. Dustin Kirkland’s session on encrypted home folders and of course the Docs Day sessions were fantastic 😉

So I was wondering what everyone’s favourites so far were…

My favourite comment was from Mark Shuttleworth during his Q&A, I’ve seen similar questions asked so many times but I’ve never seen an answer as succint:

(12:24:03 PM) jcastro: <rabbit251> jcastro: QUESTION: Do you see Wine (and Windows-compatibilty in general)
or native Linux ports as the more important ingredient in the success of Ubuntu, or do they each play an
important role?
(12:24:18 PM) sabdfl: they both play an important role
(12:24:30 PM) sabdfl: but fundamentally, the free software ecosystem needs to thrive on its own rules
(12:24:41 PM) sabdfl: it is *different* to the proprietary software universe
(12:24:54 PM) sabdfl: we need to make a success of our own platform on our own terms
(12:25:08 PM) sabdfl: if Linux is just another way to run Windows apps, we can't win
(12:25:13 PM) sabdfl: OS/2 tried that

I’ve started using the last two lines as my email signature.

© 2018 The Midlife Geek

Theme by Anders NorenUp ↑