Questions tagged [application-development]

Writing applications for Ubuntu (including Ubuntu Touch) and questions about the application submission process to the Ubuntu Software Center. This covers both open source and commercial applications.

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Cannot install wxmaxima in Ubuntu 16.04 [closed]

I am not able to install wxmaxima. The app is displayed in the software center and also starts installing but in dos not proceed to complete the installation. What difference it makes when I change ...
user avatar
1 vote
0 answers
102 views

Ubuntu SDK: No private key file given

I've just installed ubuntu-sdk to play with it. When I'm creating a new project with qmake I always get this error "Application failed to start: No private key file given" (screeshot attached), always ...
opaijavai's user avatar
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2 votes
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Are there projects/initiatives to put "troubleshooting wizards" in Ubuntu/Linux? [closed]

Apparently, since 1992 Microsoft has added many troubleshooting wizards to the Help System in Windows and Microsoft Applications. Linux Distributions have similar task-oriented series of dialogs, ...
knb's user avatar
  • 4,994
0 votes
1 answer
76 views

Software redistribution - package dependencies vs stand-alone

I have a small application and want to redistribute it to other Ubuntu users. The QT library is used I will distrbute it as easy-to-install debian package My question is, should I put QT packages as ...
user7309776's user avatar
6 votes
3 answers
302 views

Where can I share my custom scripts? [closed]

I made a set of custom scripts for Ubuntu. I wish to share these on the Internet. Which services for sharing code with other users are available ?
NicolasSmith's user avatar
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SSH to a login to Ubuntu Core on Raspberry Pi requires password

I created an Ubuntu core SD for my Raspberry-3 and booted it. Then from my IPad using an app I tried to SSH to it. As far as I understood from the instructions I should not be asked any password to ...
user1046647's user avatar
2 votes
1 answer
644 views

Snappy Ubuntu Core 64 bit

Is the image for Raspberry pi 3 a 64-bit OS? (http://releases.ubuntu.com/ubuntu-core/16/ubuntu-core-16-pi3.img.xz)
Miky Gal's user avatar
2 votes
1 answer
58 views

Am I allowed to add user to a particular group upon installation of my package?

Suppose I've developed a program that requires that the user belongs to a specific group. I certainly can request a user to add themselves before installing my deb package,though I would prefer the ...
Sergiy Kolodyazhnyy's user avatar
4 votes
0 answers
57 views

What apparmor policy do I need in my click package for offline html5 application?

Hello all you knowledgeable people. I have created an ubuntu HTML5 application. A simple, offline application. You can browse it on github: https://github.com/BigET/ResistorCalculator In order for ...
E. Timotei's user avatar
2 votes
1 answer
2k views

VR Headset support in linux?

I volunteer for a non-profit, making, and repairing kid friendly art & science displays. Some college kid has just developed a VR experience, and requested we purchase a HTC Vive Virtual Reality ...
j0h's user avatar
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2 votes
1 answer
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Creating simple login form using Qt creator without any QtQuickControls

I am new to Qt Creator . I want to build a simple form( example a Login form) with a submit button in qml but without using any import QtQuick.Controls. How to create buttons using Rectangle component?...
Sayli Jawale's user avatar
1 vote
0 answers
294 views

Ubuntu Touch apparmor denials when making Http Post/Get requests?

I'm trying my hand at developing a native QML app for Ubuntu Touch, but when it comes to fetching remote content from my server to populate a list view, it fails with an apparmor denial. Here is my ...
Keefer Rourke's user avatar
1 vote
1 answer
2k views

How to run Symfony on Ubuntu 16.04 with php7

I have installed php7 on Ubuntu 16.04 and I have installed Symfony also, but when I try to run server from my command line it shows this error: PHP Fatal error: Uncaught Symfony\Component\Debug\...
Kanat's user avatar
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1 answer
227 views

pyotherside cannot be loaded on Ubuntu 16.10

I recently updated from Ubuntu 16.04 to Ubuntu 16.10 and want to recover an old Ubuntu Touch App that I wrote using pyotherside. I have installed both packages qml-module-io-thp-pyotherside and ...
Sven's user avatar
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3 votes
0 answers
179 views

What's the proper way to fork a deb file? [closed]

I downloaded the source code of a package using apt-get source, and changed it mostly for my own use. But then how do I manage the forked project? I have no problem if it is just a deb file. But ...
user23013's user avatar
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3 votes
0 answers
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Ubuntu Component Showcase not working in 16.04

I'm working through this tutorial, but I'm unable to find the Component Showcase QML file using the provided path (/usr/lib/ubuntu-ui-toolkit/examples/ubuntu-ui-toolkit-gallery/ubuntu-ui-toolkit-...
pdoherty926's user avatar
5 votes
1 answer
322 views

Ubuntu Touch Emulator on 16.10

What sort of dire sorcery is required to make the Ubuntu Touch emulator work? I enabled Hardware Visualization in my BIOS, followed various tutorials, reinstalled everything a couple of times and ...
NeoTheThird's user avatar
2 votes
1 answer
2k views

Which file descriptors (/dev/fd/##) are used in process substitution?

I have a program which takes 2 inputs: my_program --input1 {videoFile1} --input2 {videoFile2} I want to redirect my inputs through process substitution (because my inputs are large video files, ...
geekydel's user avatar
1 vote
0 answers
104 views

Send SMS with Cordova

The built-in messaging app in Ubuntu Touch has no commit since 2014, I would create a new one using Cordova. Ubuntu Touch is supported by Cordova, but during plugin search I saw that sms plugin looks ...
Anthony's user avatar
  • 115
3 votes
1 answer
941 views

Showing notification in Ubuntu based installs

I am (trying) to write a simple python script for ubuntu based OS. As part of script, a notification is also shown. Now, I have gone through a number of posts over here but with each one I have an ...
Paritosh's user avatar
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1 vote
0 answers
303 views

Ubuntu equivalent of Winforms?

I am someone who has spent maybe 2 or 3 years developing business applications using C# and Winforms. At home I would like to learn how to do the equivalent in Ubuntu. What language should I be ...
Thomas Harris's user avatar
2 votes
1 answer
180 views

How to launch another app from my Ubuntu Touch app?

I want to have a button in a Ubuntu Touch app I'm planning to create which will launch another app (say camera-app). How can this be done?
pomsky's user avatar
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1 vote
1 answer
594 views

How to install Android Studio in Ubuntu Touch

I'm interested in buying BQ Aquaris M10 Ubuntu Edition but first I would like to know if it's possible to install Android Studio in it. Since the tablet comes with Ubuntu 15.04 installed and when a ...
Ped's user avatar
  • 11
6 votes
1 answer
1k views

"Signing key does not exist" after successful upload on Launchpad

I have added my package as a ppa successfully (it says Successfully uploaded packages with the command dput ppa:user/my_package my_package_0.3-1_source.changes). However, It says that the signing key ...
user123456's user avatar
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6 votes
2 answers
4k views

debian/control doesn't list any binary package

I am running the debuild in order to generate the <source.changes> file to later upload my package using dput ppa:myusername/mypackagename <source.changes> as briefly mentioned here. I ...
user123456's user avatar
  • 2,368
1 vote
1 answer
536 views

Is QtAudioEngine available for Ubuntu 16.04?

I'm trying to add sound to a Qt application on Ubuntu 16.04 with the Ubuntu SDK. The following QML builds but fails at run-time with module "QtAudioEngine" is not installed: import QtQuick 2.2 ...
James Rhew's user avatar
1 vote
0 answers
138 views

Cannot access network from LXD container created by the ubuntu-sdk [duplicate]

I've created an LXD armhf image from inside the ubuntu-sdk, and I can launch it successfully. However, this image is not able to access the network: any execution of apt-get install ... will fail with ...
mardy's user avatar
  • 498
45 votes
1 answer
2k views

Using Gtk.Widgets in App Indicators with Python

In 2010 Stefano Palazzo , asked a related question, Putting an arbitrary gtk.Widget into an appindicator.Indicator, and similar one was asked on StackOverflow. In both cases the consensus is that ...
Sergiy Kolodyazhnyy's user avatar
0 votes
1 answer
66 views

Howto publish in Ubuntu App Sotre an app that was not writted with Ubuntu SDK?

I have written a game for Ubuntu Phone, without using Ubuntu SDK. I have written, compiled and tested it on Meizu MX4 Ubuntu Edition. I have the binary file and .desktop launcher for it, plus couple ...
Kris Jace's user avatar
0 votes
1 answer
245 views

How to create a cross-platform Ubuntu Touch app without qmlscene?

I have learned C++ and Qt to be able to create cross-platform apps. I have a very simple app built as executable that runs on desktop but I can't figure out how to make it work on my Ubuntu phone. ...
moldcraft's user avatar
  • 133
-3 votes
1 answer
123 views

How to understand Ubuntu and become developer [closed]

Can you guys tell me, how to become a Pro Ubuntu User? Where did you guys learnt all this from? Which book or which Programming language have you all learnt? I also want to learn how to build ...
SARANGKASHALKAR's user avatar
0 votes
1 answer
778 views

move Android sdk in different partition from ubuntu directory

I am getting complete installation guide at Askubuntu, but i have different problem. I want to move Android sdk from home directory to a different partition in same hdd(because I have dual boot win 10+...
upendra's user avatar
2 votes
1 answer
33k views

Installing Qt 5.x on Ubuntu globally

Hello everyone! :) I need to install Qt 5 globally on Ubuntu to be able to use QML libraries like Kirigami. However, the wast majority of Google search results tell how to install it locally (as a ...
Ilya's user avatar
  • 123
2 votes
0 answers
687 views

Ubuntu-SDK-IDE: QXcbConnection: Could not connect to display

In the case applications executed from the Ubuntu SDK IDE in a LXD container can not connect to the X Server, the X11 socket in /tmp/.X11-unix was probably deleted and the container can not access the ...
zbenjamin's user avatar
4 votes
2 answers
94 views

Can I roll back my ppa (that I own) on Launchpad for a specific Ubuntu version?

I own a project on Launchpad. I developed it on 16.04, most of the time tested it on 14.04 to check, except for the latest version. It turns out the latest version runs fine on 16.04, but not ...
Jacob Vlijm's user avatar
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0 votes
1 answer
2k views

failed find 'ANDROID_HOME' environment variable

I know this is quite a common question being asked and this below seems to give a detailed explanation but the thing is, I still couldn't get my sdk running why? (still really new with linux hierarchy ...
Dora's user avatar
  • 445
-1 votes
1 answer
168 views

Find an application file containing code for popup window

Ubuntu 14.04 When launching installed third-party app, it displays a popup window with notification message. I want to find an application file which contains code that show this popup window. Is ...
minto's user avatar
  • 831
0 votes
1 answer
47 views

What is the difference between an installed scope, before and after the first reboot?

I'm playing around with Ubuntu touch scopes, but I have one strange problem. When I create a scope (this is also true for the example scopes: new project -> Unity Scope (current) -> Qtscope using HTTP+...
EddieG's user avatar
  • 1
17 votes
6 answers
8k views

Where can I find a metronome for music practice?

This is somehow a follow up of this question: How can I detect the BPM (beats per minute) of a song? But now instead of detecting them in songs, I want to generate them. I am looking for an ...
Parto's user avatar
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0 votes
1 answer
253 views

What is the proper way to open a url from a scope in c++?

What is the proper way to open a url from a scope in c++? This is what I've tried (This function is called from the ActivationResponse.): static void open_url(std::string const& uri) { // ...
EddieG's user avatar
  • 1
1 vote
1 answer
85 views

Device not showing in ubuntu-sdk on lxc

I am running ubuntu-sdk in an lxc Ubuntu container (due to it not being available for my host distro) and passing a Nexus 4 running Ubuntu 15.04 (OTA-12) with lxc-device add $(readlink -f /dev/android)...
user user user's user avatar
53 votes
1 answer
1k views

Building Full Perl Support in Ubuntu SDK

I am running Ubuntu v14.04, and after some effort, I have successfully installed the Ubuntu SDK. I need to use Perl + QML/Qt to develop a (potentially large) number of fully-functional apps through ...
Will Braswell's user avatar
1 vote
1 answer
41 views

Unknown policy-vendor error in snap package review

I am trying to package an application in snap format, but When I do snap-review olam_0.1_amd64.snap It shows this error - security-snap-v2:policy-vendor unknown policy-vendor 'ubuntu-core' How ...
Tachyons's user avatar
  • 17.3k
0 votes
1 answer
52 views

Ubuntu SDK HTML5 App scan dir

I am making a small HTML5 app because I didn't get into QML yet (and can reuse some foreign code) and I am trying to load a bunch of files from a directory, possibly outside the app dir, but e.g. in ~/...
Peter Nerlich's user avatar
0 votes
1 answer
99 views

U1Db QML API database on Application update

I have made an application in QML that uses U1Db qml Api (sdk 15.04.5). The Application create a database to save his data. The application is already loaded on Ubuntu store and available to the users....
userFulvio999's user avatar
0 votes
1 answer
100 views

Do Seahorse and GPG terminal program work standalone?

I have generated a Personal PGP Key with the Seahorse GUI as instructed by Launchpad. I have to manually sign a file for the Ubuntu Code of Conduct but... GPG doesn't find the Key so I need to know if ...
userDepth's user avatar
  • 2,010
2 votes
1 answer
5k views

Problem installing snapd

I like to install snapd but my computer say message like this: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package snapd how ...
Jeko Paul's user avatar
5 votes
1 answer
380 views

What is the difference between appindicator and AppIndicator3

Ubuntu indicators written in python can be done with two APIs : appindicator and AppIndicator3. What is the difference between them and is there any advantage to using one over the other ?
Sergiy Kolodyazhnyy's user avatar
0 votes
1 answer
33 views

Realization of the Static links [closed]

I know about Static and Dynamic links. but I have a problem with static link: Static link is a part of application and it compile with application isn't it? But why are there in here? They should be ...
Sinoosh's user avatar
  • 2,031
1 vote
0 answers
22 views

Ubuntu app dev language [duplicate]

I work as a java dev so I know java and I'm learning python. Is this enough for developing ubuntu desktop apps or I need more? I would like to focus on good gui builders and I know kava swing is ...
fixxxera's user avatar
  • 355

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