Ubuntu Touch Programming Course



  • Not yet I was still trying to run it on my desktop. When that didn't work i didn't try running it on my Phone. The "Running on your device" section comes after that.



  • Tried running it on the device. after activating developer mode, the SSH notification doesn't appear at all. Also i tried installing Ubuntu sdk again. At the step

    sudo apt-get install ubuntu-sdk

    i get the following error

    The following packages have unmet dependencies:
    ubuntu-sdk : Depends: ubuntu-sdk-libs-dev but it is not going to be installed
    E: Unable to correct problems, you have held broken packages.



  • Assuming Kubuntu being a possible cause for the problem, I decided to try it out on Kde Neon and Ubuntu. Kde Neon again seemed to have the same problem of not wanting to install dependencies. So then I Installed Ubuntu and tried the same on it. only to encounter some other errors, here are a few ones.

    during

    sudo lxd init
    in the question on default storage back-end to use, Ubuntu wouldn't take zfs for an option for some reason.
    so had to then use the command
    sudo add-apt-repository ppa:ubuntu-lxc/lxd-stable
    this doesnt work either. instead one has to use
    sudo add-apt-repository ppa:ubuntu-lxc/stable

    After this there was no zfs option available at all.
    so had to use this

    sudo apt install -t xenial-backports lxd lxd-client

    after all of this i am back to the same problem which i faced in the first step.

    I am trying to follow the tutorial here and managed to install the new Ubuntu Sdk. When I run or build the app i get the following messages

    in Issues> error: There was a error in the device detection of desktop, no IP address was returned.
    in application output> Application failed to start: No private key file given.

    As a last step will try compiling the clock app as mentioned in the Readme.Developers.



  • Good evening.

    I have uploaded the translation of the chapter "Formatting label and events". I'll upload the source code next week. I have another collaboration from Fulvio pending and I hope to upload it next week.
    https://mimecar.gitbooks.io/ubuntu-touch-programming-course/content/en/chapter-04-s03.html



  • @nithin said in Ubuntu Touch Programming Course:

    After this there was no zfs option available at all.
    so had to use this

    sudo apt install -t xenial-backports lxd lxd-client

    Thanks! Using lxd from xenial-backports helped to overcome that Creating the bridge failed with: not implemented issue.

    It would be nice to have this hint in Course.



  • @mimecar : following you.
    Thanks for your work !
    Pulsar33



  • @tischlerwilly @mimecar : Error No Storage Pool Found
    As said by tischlerwilly, I have the same error when installing the developper kits :

    No storage pool found
    I'm also using MINT 18(.3) 64bits. Did you find the solution, please ?
    Best regards
    Pulsar33

    Oooops ! See below ...



  • @mimecar @HendriXXX @TischlerWilly :

    Hello,
    Sorry, I've discovered that when I search for something with CTRL-F in a long thread with Firefox, the process doesn't see all the content. So at the beginning of the thread, searching for "pool", I found only the posts of TischlerWilly and mimecar but no complete answer.
    This is why I thought there was no answer ...
    If I go at the end of the thread, I find the answers of HendriXXX and mimecar, so I'll give a try to the solution and report here how it goes.
    Have a nice day
    Pulsar33



  • @mimecar said in Ubuntu Touch Programming Course:

    • sudo add-apt-repository ppa:ubuntu-lxc/lxd-stable

    This command returned an error. I tried this instead :

    • sudo add-apt-repository ppa:ubuntu-lxc/stable

    I hope it was the good choice. Next I followed the proposal of HendriXXX :

    • sudo chown lxd:lxd /var/lib/lxd/unix.socket

    All the process worked and my kits are created now.
    However, I didn't see the error "container is faulty"
    Proceeding to the next steps ...
    Best regards
    Pulsar33



  • This may seem off-topic, but way a custom PPA when LXC and LXD are available in the repositories?



  • @mimecar : Hello
    I've been able to generate Hello Word and Calculator applications.
    All is perfectly clear and well explained. Thank you !

    However, I'm facing three errors as described below. Maybe are they due to the same reason.

    As far as ipvoid knows, the faulty IP is :
    IP Address: 91.189.88.161
    Hostname: keeton.canonical.com
    Organization: Canonical Group Limited
    ASN: AS41231 Canonical Group Limited
    Continent: Europe (EU)
    Country: United Kingdom (GB)
    Latitude\Longitude: 51.5142 / -0.0931
    Region: England
    City: London

    It seems that this must be solved to continue learning how to create my own applications. Have you a solution please ?
    Have a nice day.
    Pulsar33



  • @pulsar33 Vivid reached End of Life in February 4, 2016. You need to replace all the archive.ubuntu.com with old-releases.ubuntu.com in your sources.list



  • @advocatux @mimecar : Hello
    Thank you for the reply, however I'm not sure to know what to do now. As far as I understand, the problem is to update the kits, not my system which is perfectly up to date (I use MINT18.3). I've searched the whole GUI of Qt Creator but not found how to specify the sources.

    Where are defined the sources for the kits ?

    Moreover, why am I the first to have the problem following the Programming Course if the end of life of Vivid was in February 2016 ?

    Good evening
    Pulsar33



  • @pulsar33 said in Ubuntu Touch Programming Course:

    As far as I understand, the problem is to update the kits, not my system which is perfectly up to date

    It seem so. I guess we need to update /etc/apt/sources.list inside lxd contaner used for building?



  • I did this:

    • Enter container with lxc exec device-armhf -- /bin/bash
    • Replace archive into old-releases in sources.list with sed -i "s|archive|old-releases|" /etc/apt/sources.list

    But after that, running apt update inside container, I get errors about ports.ubuntu.com/ubuntu-ports/dists/vivid/... (404 Not Found), while old-releases works fine for other repositories.

    There are in fact no vivid in this repo:
    http://ports.ubuntu.com/ubuntu-ports/dists/

    So what cane ports host be changed into? Is there archive as that old-releases somewhere?



  • @talkless In my containers I replaced all urls by http://old-releases.ubuntu.com/ubuntu
    also the ports ones
    vivid vivid-security vivid-backports vivid-updates (main / multiverse / restricted / universe) are all included there



  • @chris said in Ubuntu Touch Programming Course:

    @talkless In my containers I replaced all urls by http://old-releases.ubuntu.com/ubuntu
    also the ports ones
    vivid vivid-security vivid-backports vivid-updates (main / multiverse / restricted / universe) are all included there

    But there's no ubuntu-ports repository (directory) inside http://old-releases.ubuntu.com/



  • @talkless @chris @mimecar : Well shot Guys !
    Thank you for the tip. I didn't try for the armhf-device kit but I succeed for the desktop kit. In fact, the configuration is different for the two kits and the desktop kit only involves "archive". So the tip of @Talkless was clean and the (long) update took place without error.

    101 upgraded, 2 newly installed, 0 to remove and 0 not upgraded. Need to get 95.3 MB of archives. After this operation, 36.1 MB of additional disk space will be used.
    [...]
    Get:103 http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu/ vivid/main unity8-private amd64 8.15+15.04.20161129-0ubuntu1 [584 kB]
    [...]
    Processing triggers for libc-bin (2.21-0ubuntu4.0.1) ...
    ---Task exited with no errors---

    Most updates are from ci-train-ppa-service ...
    The HelloWorld example compiles and runs without problem.

    Upon the next launch of Qt Creator, only the armhf-device update is proposed.
    Finding ports.ubuntu.com correct source may solve the last problem.

    Good evening
    Pulsar33



  • Hello,
    I'm not sure I've done the right things and I hope a "guru" will warn me if necessary but I found how to update the device-armhf kit :

    lxc exec device-armhf -- /bin/bash
    root@device-armhf:/# cd /etc/apt
    root@device-armhf:/etc/apt# sed -i "s|archive|old-releases|" sources.list
    root@device-armhf:/etc/apt# sed -i "s|ports.ubuntu.com/ubuntu-ports|old-releases.ubuntu.com/ubuntu|" sources.list

    Then, the (long) update ends with no error.

    This seems fine but I must now understand why all my choices are for 14-10 framework despite the fact that my kits are made with 15-04 framework ...
    limited choices

    Solution is welcome !
    Best regards
    Pulsar33



  • I think this is a major indication that the SDK needs to be maintained so we can make Ubuntu Touch a success. I think a lot of you can agree with that.


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