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    Ubuntu Touch Programming Course

    Scheduled Pinned Locked Moved App Development
    documentationubuntu touch
    113 Posts 27 Posters 74.2k Views 12 Watching
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      • mimecarM Offline
        mimecar
        last edited by mimecar

        Good afternoon.

        I've posted a new course block. While the previous blocks worked with the Ubuntu Touch SDK, native applications will be programmed in this block on the desktop. There is also a new application that I hope you will be interested in programming.
        https://mimecar.gitbooks.io/ubuntu-touch-programming-course/content/en/chapter-06.html

        This month I hope to publish more content I have pending. I will inform you about the news in this forum thread.
        https://www.gitbook.com/book/mimecar/ubuntu-touch-programming-course/details

        1 Reply Last reply Reply Quote 2
        • N Offline
          Nithin
          last edited by

          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.

          Couldnt find the solution anywhere to this. Does anyone know what is happening here.

          1 Reply Last reply Reply Quote -1
          • mimecarM Offline
            mimecar
            last edited by

            Hi @Nithin,

            On the Devices tab, have you configured the ports and the SSH connection?

            1 Reply Last reply Reply Quote 0
            • N Offline
              Nithin
              last edited by

              HI mimecar, Thanks a lot for the help. I am running Kubuntu, and not Ubuntu. Should that be a problem?
              This is how my devices tab looks like
              0_1517946583070_32c560b4-92f9-47c8-910e-88f28dc41634-image.png
              0_1517946598491_c056bed5-84c4-4daf-b88b-cdeafff9f7db-image.png
              Also this
              0_1517946984981_b05f661e-2532-4a63-b344-a25578f68fbe-image.png

              mimecarM 1 Reply Last reply Reply Quote 0
              • mimecarM Offline
                mimecar @Nithin
                last edited by

                @nithin, Have you done all the steps in the "Running the Application on a Real Device" section?
                https://mimecar.gitbooks.io/ubuntu-touch-programming-course/content/en/chapter-02.html

                On the screen of Ubuntu devices you should get your phone.

                1 Reply Last reply Reply Quote 0
                • N Offline
                  Nithin
                  last edited by Nithin

                  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.

                  1 Reply Last reply Reply Quote 0
                  • N Offline
                    Nithin
                    last edited by Nithin

                    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.

                    1 Reply Last reply Reply Quote 0
                    • N Offline
                      Nithin
                      last edited by

                      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.

                      T 1 Reply Last reply Reply Quote 1
                      • mimecarM Offline
                        mimecar
                        last edited by

                        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

                        Pulsar33P 2 Replies Last reply Reply Quote 2
                        • T Offline
                          Talkless @Nithin
                          last edited by Talkless

                          @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.

                          Volla Phone X

                          1 Reply Last reply Reply Quote 0
                          • Pulsar33P Offline
                            Pulsar33 @mimecar
                            last edited by

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

                            Aquaris BQ E5 HD UBports OTA-25 (currently testing features)
                            Aquaris BQ E5 HD Ubuntu Edition Canonical OTA-15 (last Canonical version, daily use)
                            Raspberry Pi 4 B - 4 GB & 8 GB with various OS and Desktops (UBports not OK)

                            1 Reply Last reply Reply Quote 0
                            • Pulsar33P Offline
                              Pulsar33 @TischlerWilly
                              last edited by 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 ...

                              Aquaris BQ E5 HD UBports OTA-25 (currently testing features)
                              Aquaris BQ E5 HD Ubuntu Edition Canonical OTA-15 (last Canonical version, daily use)
                              Raspberry Pi 4 B - 4 GB & 8 GB with various OS and Desktops (UBports not OK)

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                              • Pulsar33P Offline
                                Pulsar33
                                last edited by

                                @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

                                Aquaris BQ E5 HD UBports OTA-25 (currently testing features)
                                Aquaris BQ E5 HD Ubuntu Edition Canonical OTA-15 (last Canonical version, daily use)
                                Raspberry Pi 4 B - 4 GB & 8 GB with various OS and Desktops (UBports not OK)

                                1 Reply Last reply Reply Quote 0
                                • Pulsar33P Offline
                                  Pulsar33 @mimecar
                                  last edited by

                                  @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

                                  Aquaris BQ E5 HD UBports OTA-25 (currently testing features)
                                  Aquaris BQ E5 HD Ubuntu Edition Canonical OTA-15 (last Canonical version, daily use)
                                  Raspberry Pi 4 B - 4 GB & 8 GB with various OS and Desktops (UBports not OK)

                                  1 Reply Last reply Reply Quote 1
                                  • gsilvaptG Offline
                                    gsilvapt
                                    last edited by

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

                                    1 Reply Last reply Reply Quote 0
                                    • Pulsar33P Offline
                                      Pulsar33 @mimecar
                                      last edited by Pulsar33

                                      @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.

                                      • When I create a project, only 14.10 or 14.04 options are available :
                                        Only 14.10

                                      • If I check the kits in Compile & Execute, I see a warning about path not matching :
                                        Path not matching

                                      • Moreover, each time I launch Qt Creator, an update is proposed for each kit and errors occur.
                                        Showing details, several tranfers are not available and tasks end with errors:
                                        [...]
                                        Ign http://archive.ubuntu.com vivid-security/restricted Translation-en
                                        Ign http://archive.ubuntu.com vivid-security/universe Translation-en
                                        Err http://archive.ubuntu.com vivid/main Sources 404 Not Found [IP: 91.189.88.161 80]
                                        Err http://archive.ubuntu.com vivid/restricted Sources 404 Not Found [IP: 91.189.88.161 80]
                                        Err http://archive.ubuntu.com vivid/universe Sources 404 Not Found [IP: 91.189.88.161 80]
                                        Err http://archive.ubuntu.com vivid/multiverse Sources 404 Not Found [IP: 91.189.88.161 80]
                                        Err http://archive.ubuntu.com vivid/main amd64 Packages 404 Not Found [IP: 91.189.88.161 80]
                                        [...]
                                        Err http://archive.ubuntu.com vivid-security/multiverse amd64 Packages 404 Not Found [IP: 91.189.88.161 80]
                                        W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/vivid/main/source/Sources 404 Not Found [IP: 91.189.88.161 80]
                                        W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/vivid/restricted/source/Sources 404 Not Found [IP: 91.189.88.161 80]
                                        W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/vivid/universe/source/Sources 404 Not Found [IP: 91.189.88.161 80]
                                        W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/vivid/multiverse/source/Sources 404 Not Found [IP: 91.189.88.161 80]
                                        [...]
                                        W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/vivid-security/multiverse/binary-amd64/Packages 404 Not Found [IP: 91.189.88.161 80]
                                        E: Some index files failed to download. They have been ignored, or old ones used instead.
                                        ---Task exited with errors, please check the output---

                                      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

                                      Aquaris BQ E5 HD UBports OTA-25 (currently testing features)
                                      Aquaris BQ E5 HD Ubuntu Edition Canonical OTA-15 (last Canonical version, daily use)
                                      Raspberry Pi 4 B - 4 GB & 8 GB with various OS and Desktops (UBports not OK)

                                      advocatuxA 1 Reply Last reply Reply Quote 0
                                      • advocatuxA Offline
                                        advocatux @Pulsar33
                                        last edited by

                                        @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

                                        Pulsar33P 1 Reply Last reply Reply Quote 1
                                        • Pulsar33P Offline
                                          Pulsar33 @advocatux
                                          last edited by Pulsar33

                                          @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

                                          Aquaris BQ E5 HD UBports OTA-25 (currently testing features)
                                          Aquaris BQ E5 HD Ubuntu Edition Canonical OTA-15 (last Canonical version, daily use)
                                          Raspberry Pi 4 B - 4 GB & 8 GB with various OS and Desktops (UBports not OK)

                                          T 1 Reply Last reply Reply Quote 0
                                          • T Offline
                                            Talkless @Pulsar33
                                            last edited by

                                            @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?

                                            Volla Phone X

                                            T 1 Reply Last reply Reply Quote 1
                                            • T Offline
                                              Talkless @Talkless
                                              last edited by Talkless

                                              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?

                                              Volla Phone X

                                              C Pulsar33P 2 Replies Last reply Reply Quote 1
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