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    Ubuntu Touch Programming Course

    Scheduled Pinned Locked Moved App Development
    documentationubuntu touch
    113 Posts 27 Posters 68.0k Views 12 Watching
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      • mimecarM Offline
        mimecar
        last edited by

        @HendriXXX, have you tried what Fulvio says?

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        • HendriXXXH Offline
          HendriXXX
          last edited by

          Yes I tried everything. Sadly result are same. It is strange because it works in my desktop computer right away. Maybe it is related somehow to my netboot specs..

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          • W Offline
            wdehoog
            last edited by

            @mimecar Thank you very much for providing your virtualbox image.

            One question when I connect my phone (moto g 2014) 'adb shell' under windows works but on the VM says 'device offline'.

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            • mimecarM Offline
              mimecar
              last edited by

              Good evening @wdehoog. Have you "connected" the phone to the virtual machine? Has the phone's display shown a warning when trying to connect your computer?

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              • W Offline
                wdehoog
                last edited by

                Yes it is 'connected' (otherwise there would be no device). I did not see any warning on the phone's display. It is no issue since I have setup ssh access. I was just being curious.

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                • mimecarM Offline
                  mimecar
                  last edited by

                  Check in the hidden folders of your computer user if you have one related to ADB. There may be some previous configuration and therefore the computer is not requesting the connection.

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                  • mimecarM Offline
                    mimecar
                    last edited by

                    @HendriXXX, I think I've got it.

                    The steps are:

                    • sudo add-apt-repository ppa:ubuntu-lxc/lxd-stable
                    • sudo apt-get update
                    • sudo apt-get upgrade && sudo apt-get dist-upgrade

                    Reboot the computer

                    • sudo lxd init

                    Do you want to configure a new storage pool (yes/no) [default=yes]?
                    Name of the new storage pool [default=default]:
                    Name of the storage backend to use (dir, lvm, zfs) [default=zfs]:
                    Create a new ZFS pool (yes/no) [default=yes]?
                    Would you like to use an existing block device (yes/no) [default=no]?
                    Size in GB of the new loop device (1GB minimum) [default=15GB]:
                    Would you like LXD to be available over the network (yes/no) [default=no]?
                    Would you like stale cached images to be updated automatically (yes/no) [default=yes]?
                    Would you like to create a new network bridge (yes/no) [default=yes]? no

                    LXD has been successfully configured.

                    Launch IDE with:

                    • ubuntu-sdk-ide

                    Configure the kits and restart ubuntu-sdk-ide. A message will appear indicating that the container is faulty. Accept to correct them. After this step it will work fine. I was able to run an example application on the computer and the M10 FHD with these steps.

                    Pulsar33P 1 Reply Last reply Reply Quote 1
                    • 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.

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                        • 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).

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                            • 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?

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                                    • 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.

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                                        • 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.

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                                          • 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.

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                                            • 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
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