App update: Core Death Bell 1.5

Maximilian Hille / Juliane Lehmann / Sun, Oct 30, 2016

Core Death Bell got multiple updates recently, the most imortant changes being:

Available for free on Google Play

Find the source (GPL) on GitHub

AppBar synced FAB behavior available as a library

Juliane Lehmann / Wed, Jun 8, 2016

You can now get the FAB behavior shown in this post as a library. Go to the project on github to see the source, read the gradle instructions or file an issue. Comments are also well-liked on reddit or Google+!

There are already enhancements in place over the code as shown originally:

Near future plan is to include proper handling of AppBarLayouts that do not collapse completely.

Fabulous FABs - sliding in and out in sync with the AppBarLayout

Juliane Lehmann / Fri, Jun 3, 2016

Edit: The code from this post became a library and got significant enhancements. It’s open source, so just look it up on github for the source code and instructions on using it as a gradle dependency.

Just want the goods without explanation? See this gist.

Picture a list view, with a Floating Action Button (FAB) sitting on it, like this:

The FAB needs to be able to move out of the way, so that all parts of all list items are actually reachable. Also, it is good form in this situation to have the app bar scroll out of the way, to maximise the viewport area dedicated to the list. There’s a well-known ready-made solution for this; it looks like this

and has two disadvantages:

Here’s how to get the FAB to move in sync with the app bar.

QuickFit 1.2 released

Juliane Lehmann / Thu, Jun 2, 2016

QuickFit now features a beautiful wide layout, for use on tablets in landscape mode. See:

A post or two on how to implement this fabulous FAB behavior is to follow.

This release also fixes a bug; scheduled activities do now really get cleared by clicking on the notification and will not reappear together with the next alert.

QuickFit is free on Google Play, or be a beta tester

Find the source (Apache License 2.0) on GitHub

I’d be happy about feedback on reddit, or raise an issue on GitHub.

Automating play store screenshots for fun and additional testing

Juliane Lehmann / Tue, Apr 12, 2016

Taking screenshots for the play store is boring as hell: several locales, three form factors, setting up content data for the screenshots, possibly varying by locale… For the last release of QuickFit, I decided to automate.

xkcd says it was worth it

xkcd says it was worth it (xkcd)

What you get in this post

And because UI tests are needed and a happy byproduct of the process, it comes with

I’ll walk you through my journey on automating the screenshots for the QuickFit app. It’s open source, on github and on the play store.

QuickFit 1.1 released

Juliane Lehmann / Mon, Apr 11, 2016

QuickFit now allow scheduling workouts on a weekly repeating basis!

This update is all about taking even more thought and effort out of tracking workouts with Google Fit: Set up once when you plan doing your workouts, and then get reminded via a notification to actually do it, and to enter your session into Google Fit. The focus is still on delivering minimal UI that allows the user to get all needed information as fast as possible.

New app: QuickFit

Juliane Lehmann / Wed, Feb 24, 2016

I’m learning Android development, and after hacking on Watchlater for a while, it was time for the first project completely of my own, that should also allow me to try my hand at some framework component that Watchlater simply had no use for. That project lies dormant on my HDD - while it taught me about the support library, material design and all about the service lifecycle, ultimately my goal of writing the IRC client I wanted was doomed from the start. The IRC protocol simply does not allow to identify users persistently, and so my goal of presenting query conversations on the same level as channels was unreachable. So QuickFit is the much better replacement project.

For me, using Google Fit is about logging my activity, looking at the calendar view and seeing a nice, high level and getting my daily pling. So walking and cycling gets tracked nicely automatically, but of course I want to enter my other workouts too. The Google Fit app can do this, but it is a bit of a long process: select the activity from the dropdown (easy, with the favorites), enter a time span, hit submit, get the “activity is in the future” message, go back, decide on some easy-to-enter start time that will work, hit submit again. That should be easier!

There was my perfect excuse for an app that allows me to:

Available for free on Google Play, or be a beta tester

Find the source (Apache License 2.0) on GitHub

I’d be happy about feedback by mail, or raise an issue on GitHub.

App update: Watch Later 1.3.1

Maximilian Hille / Mon, Jan 18, 2016

Watch Later got another update:

Available for free on Google Play

Feedback welcome on Reddit

Find the source (GPL) on GitHub

App update: Watch Later 1.2.2

Maximilian Hille / Thu, Oct 22, 2015

Watch Later got an update:

Unfortunately, we did not have time yet to get around Android M’s AppLinks-Anti-Feature. There are some ideas, but no time right now.

Available for free on Google Play

Feedback welcome on Reddit

Find the source (GPL) on GitHub

Android cheatsheet

Maximilian Hille / Wed, Jul 29, 2015

I googled the following things so often that I will be lazy and put them on my site for easier retrieval:

Android debug keystore fingerprint

keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android


Android emulator hardware acceleration

emulator -avd <avd_name> -qemu -m 512 -enable-kvm


Android emulator mock GPS location

adb emu geo fix 121.4961236714487 31.24010934431376


Update: GUI for ibutton

Maximilian Hille / Thu, Jun 4, 2015

The recently released Go application for controlling iButtons just got a small update: A GUI interface. It is very basic for now, but, as far as I know, the first graphical iButton interface for Linux.

I did not yet check if the App works from your Ubuntu Touch device, but since it should only depend on the installed kernel modules and working USB-to-go, I will need a physical device to actually test this. Android kernels usually do not carry the necessary drivers…

Building this has been a nice opportunity for me to learn a bit of the upcoming Ubuntu way of doing apps. The Ubuntu SDK uses Qt/QML as frontend language. QML is a specialized JavaScript’esque language for doing MVC. Qt has bindings ready in a lot of languages, but Go being part of the officially supported ones in the SDK (Go, Python, C++) could be a nice go-to app architecture in the future.

That said, the Ubuntu SDK is still at a very early stage. After years of doing Android, Ubuntu’s docs and the IDE (customized QtCreator) seem pretty rough.

You can find the project on GitHub, the license is (like the rest of go-netlink) GPL3+.

Go release: go-netlink

Maximilian Hille / Tue, May 5, 2015

To read Maxim iButton temperature sensors in Linux is not a big problem, but needs some work. There is a kernel module / driver for the USB reader adapter. This kernel module can be accessed from user space via a special file ‘rw’ or via a Netlink interface.

The ‘rw’ method is straight forward (with the technical docs from Maxim), but has some drawbacks: The file as it is created is only accessible for root and the location of this file is depending on the unique ID, distribution and maybe even the kernel version.

The Netlink method does not have these drawbacks, but in order to use the Netlink interface, you need to learn a bit about the Linux kernel.

After reading more kernel code that I wanted and learning about how to debug a running kernel (thanks for making Systemtap), I managed to talk to the iButton. You can grab the code at GitHub, it’s license is GPL3+.

The Go packages mirror the Netlink / Connector / One-Wire layer hierarchy within the kernel. Thus, the code can also be interesting for people trying to talk with other branches on those subsystems.

Note that the implementation is not very clean yet. I get some warnings like ALLCAPS for constants. I consider myself still a Go rookie ;-)

App release: Watch Later

Maximilian Hille / Tue, May 5, 2015

Do you also sometimes encounter YouTube links while browsing on the way? Chances are you have the same problem as me: the YouTube app would open and instantly start buffering, consuming precious amounts of mobile data volume.

Do not want to miss the video but watch it later with unlimited internet (eg. at home)? Look no further - I just released a small app called ‘Watch Later’. It registers on YouTube http URLs and can add the video to your YouTube account’s Watch Later list.

Available for free on Google Play

Feedback welcome on Reddit

The App is licensed under GPL, sources available on GitHub

The Second Cloud

Maximilian Hille / Wed, Oct 1, 2014

A lot of us fell victim to the sweet poison of cloud services – me included. Services I use on a daily basis include Google Drive, Google Maps, Github and Gmail, just to name a few. Those are comfortable programs. Running in your browser, everywhere, always up-to-date. No need for backups or any maintenance at all.

What is the price of all this?

You are not only accessing data on remote systems, but you can not know what code will run over there. This is actually worse than running proprietary software on your machine, since you lost even the most basic ways of analysing what’s happening.

Also, giving away the control over your data. Most services will tell you that the data is secure there, but do not believe them! They can access the data and will give access to whoever has enough power or money.

What now?

Everyone builds their own server? This is where a lot of still active services originate from. Mail and Websites can be run by yourself, but it certainly not possible for everyone.

The last months and the success of Bitcoin let me to believe that peer-to-peer based services can help. Bitmessage tries to replace Email. There are even more ambitious ones like MaidSafe which have no lesser goal than building an Internet replacement.

These ideas are not entirely new: Freenet is around for more than a decade now. Back in 2000 there were already visionaries who knew that we would have to defend freedom on the Internet.

The currently existing/developing services might not survive the test of time and acceptance, but there are already hundreds of projects, most of these sharing concepts and code. Thus, I am confident that we will be able to replace current cloud services one-by-one with more secure peer-to-peer based alternatives.

My first day with the Rift

Maximilian Hille / Thu, Jul 31, 2014

This article documents my first hours with my Rift.

I am following Rift stuff for a couple of months now and have been very excited from the beginning. I was tempted to buy a DK1 in winter but in the end I was patient enough to wait until the DK2 pre-order. As soon as I could order and roughly knew when I would get my hands on it, I made sure I would be contract-free so I could really dive into the Rift when it arrived.

Yesterday morning I just as normal started with some Android stuff but eventually after lunch I would be to excited about the soon-to-expect UPS guy. So I could at least make sure my Windows and graphics drivers were up to date (I only use Windows for gaming so far). I also downloaded UE4 which I plan on trying out in the next couple of days.

Welcome, Hugo

Maximilian Hille / Tue, Jul 29, 2014

My old website existed only for three reasons:

  1. Google Play wants you to provide a business website
  2. German law required an ‘Impressum’
  3. I wanted to play with express.js

Since the site only had the ‘Impressum’, express.js was obviously an overkill. The only code redirected you to /impressum. Trying new stuff and now maybe actually fill this site with some more life, I was searching for a new engine which would fit my needs.