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    Ubuntu Touch Programming Course

    Scheduled Pinned Locked Moved App Development
    documentationubuntu touch
    113 Posts 27 Posters 68.2k Views 12 Watching
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      • mimecarM Offline
        mimecar
        last edited by

        A question related to the course. Are your applications working well with UBports firmware (I still have Canonical firmware)? Are there any errors other than those related to LXD and Ubuntu 16.04?

        F 1 Reply Last reply Reply Quote 0
        • F Offline
          fulvio @mimecar
          last edited by fulvio

          Hi @mimecar,
          i have successfully installed UBports on my tablet BQ M10 FHD removing Canonical version using UBports installer. Currently i don't have problems about applications running and development (using Ubuntu SDK).
          I have installed on UBports an old application (QML + js) that i have made for Canonical version and works well.
          I'm using Ubuntu SDK and emulator and i don't have problems (i have installed it some time ago). For example i can connect my tablet (running UBports version) with the PC ( running ubuntu 16.04 LTS) and i can run applications from Ubuntu SDK to test them, like previously with the Canonical version.
          I have made i couple of new applications (QML + js), packaged as .click with Ubuntu SDK, deployed on OpenStore and successfully installed on my Tablet (and other people have downloaded them). I can't provide info about Scope and applications made with languages different from QML and javascript.
          If you mean specific tests or info tell me.
          My tablet run UBPorts 15.04 (r9) availabe on Ubports RC channel.

          1 Reply Last reply Reply Quote 0
          • HendriXXXH Offline
            HendriXXX
            last edited by

            Thanks @mimecar, I tried your install steps, but it still didn't work.

            BUT
            I managed to find actual cause of the problem.. it was permission problem. "unix.socket" file was owned by root. So I changed file ownership to lxd and it works.

            sami@acer1:~$ ls -la /var/lib/lxd/unix.socket
            srw-rw---- 1 root root 0 marra 13 12:37 /var/lib/lxd/unix.socket
            sami@acer1:~$ sudo chown lxd:lxd /var/lib/lxd/unix.socket
            sami@acer1:~$ ls -la /var/lib/lxd/unix.socket
            srw-rw---- 1 lxd lxd 0 marra 13 12:37 /var/lib/lxd/unix.socket
            

            Hope this helps if someone else has same problem someday.. 🙂

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

              Thank you for answering @fulvio. I hope to move on to UBports firmware today.

              @HendriXXX , I will add your answer to the course. Thank you for sharing the solution.

              The Telegram group link of the course is now fixed (previously expired from time to time).

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

                Good afternoon

                I just published the December course chapter. In this issue, @fulvio 's example application continues. Based on the temperature recorder, the possibility of displaying temperatures on a graph is added.

                The concepts are more advanced than those seen in the normal course. For this reason, it is necessary to have a solid base of QML, JavaScript and SQLite. If you have any questions you can ask in the forum.

                I was planning to publish more content. There is a translation that I have to revise and publish, but for reasons of time I will publish it in January. There are some surprises in the inkwell, but at the moment I won't give any more details.

                • https://www.gitbook.com/book/mimecar/ubuntu-touch-programming-course/details
                • https://github.com/mimecar
                1 Reply Last reply Reply Quote 0
                • 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)

                                        1 Reply Last reply Reply Quote 0
                                        • 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
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