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Ubuntu Touch Programming Course

Scheduled Pinned Locked Moved App Development
documentationubuntu touch
113 Posts 27 Posters 67.7k Views 12 Watching
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    • M Offline
      mimecar
      last edited by 12 Nov 2017, 16:06

      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 13 Nov 2017, 10:35 Reply Quote 0
      • F Offline
        fulvio @mimecar
        last edited by fulvio 13 Nov 2017, 10:35

        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
        • H Offline
          HendriXXX
          last edited by 13 Nov 2017, 11:08

          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
          • M Offline
            mimecar
            last edited by 19 Nov 2017, 12:12

            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
            • M Offline
              mimecar
              last edited by 9 Dec 2017, 17:46

              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
              • M Offline
                mimecar
                last edited by mimecar 1 Jun 2018, 13:04 6 Jan 2018, 12:58

                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 3 Feb 2018, 15:20

                  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
                  • M Offline
                    mimecar
                    last edited by 4 Feb 2018, 17:23

                    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 6 Feb 2018, 19:57

                      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

                      M 1 Reply Last reply 6 Feb 2018, 21:01 Reply Quote 0
                      • M Offline
                        mimecar @Nithin
                        last edited by 6 Feb 2018, 21:01

                        @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 2 Jul 2018, 12:57 7 Feb 2018, 12:56

                          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 2 Jul 2018, 19:57 7 Feb 2018, 19:54

                            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 10 Feb 2018, 21:42

                              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 15 Mar 2018, 19:20 Reply Quote 1
                              • M Offline
                                mimecar
                                last edited by 11 Mar 2018, 13:12

                                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 15 Mar 2018, 20:13 Reply Quote 2
                                • T Offline
                                  Talkless @Nithin
                                  last edited by Talkless 15 Mar 2018, 19:20

                                  @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 15 Mar 2018, 20:13

                                    @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 4 Apr 2018, 07:37 3 Apr 2018, 23:14

                                      @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 4 Apr 2018, 07:48

                                        @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 4 Apr 2018, 09:17

                                          @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 4 Apr 2018, 23:01

                                            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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