Is there a managed code replacement for Sqlite3 in MonoTouch? - sqlite

I don't trust the native Sqlite3 in MonoTouch anymore. I keep getting random crashes and although I cannot prove it, I claim that it is not my fault.
To verify this I would like to use a managed replacement of Sqlite3.
Is there a project that is syntax compatible with the native version? And more important: does somebody have experience with it?

Look at the Xamarin cross-platform MWC sample.
While it use the native libsqlite on iOS and Android versions it does use a fully managed port of SQLite for the Windows phone version (where SQLite is not available and where it's not possible to add native code).
However that won't tell you what's wrong with your application. If you're using other native libraries in your project I suggest you to remove them (one by one) and try to duplicate the sqlite crash again.

Related

Firebase and Unity: Unable to find command line tool error

After following tutorials on how to correctly install firebase into unity for an authentication system, I encountered an error that was:
Unable to find command line tool C:\The E-Learning System\Assets\Firebase\Editor\generate_xml_from_google_services_json.py required for Firebase Android resource generation.
From understnading it can not find either the google services file I imported into the assets folder or it could not find the generate_xml_from_google_services_json.py file. I looked online for people with similar problems could not find a clear answer to fix this.
This is a tool that ships with the SDK to support debugging your game in the Unity Editor. One minor caveat is that an exe actually ships on Windows (I assume that this is your operating system from the C:/). You should make sure that generate_xml_from_google_services_json.exe exists in that same directory (.exe's are typically ignored in many standard .gitignore as a catchall for build files). If it's missing, you can simply re-add the Firebase SDK and double check that this file gets included in your source repository.
If both generate_xml_from_google_services_json.py and generate_xml_from_google_services_json.exe exist under Assets/Firebase/Editor, you may also want to install Python for Windows (especially if you're still running Windows 7 or 8). This is due to a recent patch (as of 6.10.0) that fixes some incompatibilities with generate_xml_from_google_services_json.exe and older Windows variants. If that doesn't help, it would be awesome if you could file an issue or reach out to support directly. If there's a bug in that fallback, it would be helpful to surface that ASAP.
Let me know if that helps!
--Patrick

Is Realm compatible with Exponent

Is Realm compatible with Exponent?
I tried npm installing Realm for React Native in Windows but ran into the missing files issue 664. I also tried on Ubuntu, but I ran into build errors with Exponent. I don't have a mac.
An Exponent developer (ccheever) confirmed today that it is not currently supported:
https://exponentjs.slack.com/archives/random/p1483463744000506
Here is their answer regarding adding support for Realm:
we might at some point but there are some challenges with versioning
etc that make it tricky. We'll likely create a way for you to add
native code yourself if you want to use it. I think we're more likely
to add SQLite support to Exponent ahead of realm

Exported my Construct 2 game with Intel XDK (edit: Crosswalk); error message shows up. How do I get rid of it?

I just learned about the Intel XDK at Indiecade today, and I couldn't wait to get home to try a port of one of my Construct 2 games. The game ended up working perfectly, aside from the fact that it has no sound when played on my Galaxy S5. The Intel XDK Emulator plays the game with sound, but for some reason it doesn't work on my phone. My volume is all the way up. Are there any tips when importing C2 games with the Intel kit to make sure the sound is preserved?
One thing I might add is when I run the app, it gives me an error message as though I am trying to run it locally in my computer. The actual message:
Alert: Exported games won't work until you upload them. (When running on the file:/// protocol, browsers block many features from working for security reasons.)
And then it auto-jumps to:
Application Error: The connection to the server was unsuccessful. (file:///android_asset/www/index.html)
... as a matter of fact it stopped working altogether after the two error messages while I was typing this question.
Edit: OK... so I exported it within the XDK as Crosswalk rather than simply Android, and the music now works. However, the first error message I mentioned before still shows up. I won't want this on all of my apps. Any way to get rid of it?
OK so this is what I did wrong: When I exported through Construct 2, I did what I always do and exported as a web app. What I should've done is export it as an Android app. I seriously don't know why I didn't try this first but after exporting as Android and then using the Intel XDK to port it with Crosswalk, everything is peachy.
I found my answer here: https://www.scirra.com/blog/133/introducing-crosswalk-the-new-way-to-publish-to-android
I'm glad you found the answer here; I knew there would be a way :)
Just wanted to chip in as a follow-up, there is a webinar tomorrow for a much more in-depth tour of the XDK and its features - including crosswalk - than I was able to provide at IndieCade. Let me know if it works out for you!
Thanks,
Brad
Webinar Link: http://l.intelswpartner.com/u.d?V4GjZxR-vxyrcx8RFF58HZ=33001
This happens if you export as a normal html5 and not as Cordova app.
I had the same problem. I'm calling other HTML offline and solved the problem with this post:
https://software.intel.com/en-us/xdk/docs/adding-third-party-plugins-to-your-xdk-cordova-app
How Do I Reference cordova.js Script from My Project index.html File
To enable the use of Cordova plugins in an HTML5+Cordova project type, reference the cordova.js script file exactly once in your index.html file:
If your project contains more than one HTML file (or page) that will use Cordova APIs, you must include a reference to the cordova.js script file in each of those HTML files. It is highly recommended that you limit yourself to building single-page apps (SPAs) when creating Cordova applications. See this Cordova Best Practices article for more details. Also, note that the cordova.js file is a "phantom" file; it is not present in your project directory, but is added by the Cordova build system when your application is built (it is customized for your app as part of the build process).

SQLite support for windows phone 8 applications

I'have created windows phone 8 application 6 months back. In that application I have used the SQLite database. For this I've followed the below link.
http://social.technet.microsoft.com/wiki/contents/articles/18204.how-to-use-sqlite-with-a-windows-phone-8-application.aspx
Everything was fine. I have successfully stored and retrieved the data in the SQLite databse.
Now suddenly the SQLite reference which I used is not working. To solve this I have removed the reference of SQLite from the project. I followed the same procedure which is mentioned in the above link. Now my solution contains 2 projects, one is Sqlite (which is c++ wrapper) and another one is SqliteDemo (Windows Phone Application).Everything is fine up to this. But when I try to build the application, then it is saying that All the projects with in the application must target the same platform.Use configuration manager to change the values.
I change the project platform to ARM and try to build the file. But the same error it is throwing.I change the project platform to X86 and try to build the file. But the same error it is showing. For reference please see the below image.
Please help me how to solve the issue.
Thanks

How can I enable auto-updates in a Qt cross-platform application?

I love applications that are able to update themselves without any effort from the user (think: Sparkle framework for Mac). Is there any code/library I can leverage to do this in a Qt application, without having to worry about the OS details?
At least for Windows, Mac and user-owned Linux binaries.
I could integrate Sparkle on the Mac version, code something for the Linux case (only for a standalone, user-owned binary; I won't mess with distribution packaging, if my program is ever packaged), and find someone to help me on the Windows side, but that's horribly painful.
It is not a complete solution, but a cross-platform (Windows, Mac, Linux) tool for creating packages for auto-updates and installing them is available at https://github.com/mendeley/Update-Installer. This tool does not deal with publishing updates or downloading them.
This was written for use with a Qt-based application but to make the update installer small, standalone and easy to build, the installer uses only standard system libraries (C++ runtime, pthreads/libz/libbz2 on Linux/Mac, Win32 API on Windows, Cocoa on Mac, GTK with fallback on Linux). This simplifies delivering updates which include new versions of Qt and other non-system libraries that your application may depend on.
Before considering this though, I would suggest:
If you are only building for two platforms, consider using standard and well-tested auto-update frameworks for those platforms - eg. Sparkle on Mac, Google's Omaha on Windows or auto-update systems built into popular install frameworks (eg. InstallShield). I haven't tried BitRock.
On Mac, the Mac App Store may be a good option. See https://bugreports.qt.io/browse/QTBUG-16549 though.
On Linux, consider creating a .deb package and a simple repository to host it. Once users have a repository set up, the system-wide software update tools will take care of checking for and installing new releases. The steps for setting up a new repository however are too complex for many new Ubuntu/Debian users. What we did, and also what Dropbox and Google have done, is to create a .deb package which sets up the repository as part of the package installation.
A few other notes on creating an updater:
On Windows Vista/7, if the application is installed system-wide (eg. in C:\Program Files\$APPNAME) your users will see a scary UAC prompt when the updater tries to obtain permissions to write to the install directory. This can be avoided either by installing to a user-writable directory (I gather that this is what Google Chrome does) or by obtaining an Authenticode certificate and using it to sign the updater binary.
On Windows Vista/7, an application .exe or DLL cannot be deleted if in use, but the updater can move the existing .exe/DLL out of the way into a temporary directory and schedule it for deletion on the next reboot.
On Ubuntu, 3rd-party repositories are disabled after distribution updates. Google works around this by creating a cron-job to re-add the repository if necessary.
Shameless plug: Fervor, a simple multiplatform (Qt-based) application autoupdater inspired by Sparkle.
Shameless plug: this a relatively old question, but I thought that it may be useful to mention a library that I created recently, which I named "QSimpleUpdater". Aside from notifying you if there's a newer version, it allows you to download the change log in any format (such as HTML or RTF) and download the updates directly from your application using a dialog.
As you may expect from a Qt project, it works on any platform supported by Qt (tested on Windows, Mac & Linux).
Links:
Website
GitHub repository
Screenshot:
Though it works a bit differently than Sparkle, BitRock InstallBuilder contains an autoupdater written in Qt that can be used independently (disclaimer, I am the original BitRock developer). It is a commercial app, but we have free licenses for open source projects.
I've developed an auto-updater library which works beautifully on Mac OS X, Linux and pretty much every Unix that allows you to unlink a file while the file is still open. The reason being that I simply extracted the downloaded package on top of the existing application. Unfortunately, because I relied on this functionality, I ran into problems on Windows as Windows does not let you unlink an open file.
The only alternative I could find is to use MoveFileEx with the replace on reboot flag, but that is awful.
However, renaming the working directory of the application works on Windows 7 and Windows XP. I haven't tried Windows Vista yet.
I have found WebUpdate to be quite useful, though it's written with the wxWidgets. But don't worry, it's a separate app which handles your updates. The steps to integrate it are pretty simple - just write two XML files and run the updater. And yes, it's cross-platform.
The advantage of it is it will automatically download and unzip/install all you required and not just provide a popup with a notification about a new version and a link to download it. Another thing you can do with it is customizable actions.
Project's main page is here, you can read the docs or take a look at the official tutorial.
The blog post Mixing Cocoa and Qt may solve the problem for the Mac platform.
You can use UpdateNode which gives you all the possibilities to update your software. It's using a cross platform Qt client and is free for Open Source!
UPDATE
Just did some further analysis on that and really like this solution:
Pros:
Free for Open Source!!! Even the client is Open Source: https://github.com/updatenode/unclient
The client is already localized in several languages
Very flexible in terms of updates. You can even update single non-binaries.
Provides additionally a way to display messages though the client.
Ready to use binaries & installer for all common Linux distributions, single Windows binary, as well as installer and a solution for Mac (which I have not tried, as I don't have a Mac)
Easy to use web service, nice statistics and update check is integrated within few minutes
Cons:
I am missing a multi-user management in the online service. Maybe they will do it in future - I will definitely suggest that in their feedback portal
The client is a GUI client only - so, you will need to shrink it down to run without a GUI frontend (maybe only necessary for people like me ;-) )
So, bottom line, as this solution is quite new, I think there is lot of potential here. I will definitely use it in my project and I am looking forward for more from them! Thumbs up!
This is an old question but there is not Squirrel in answers which is BEST SOLUTION , here is what I'm doing in qt 5.12.4 with qt quick "my qml app" you can do this in any other language
I'm doing this in windows there is mac version of squirrel too, I don't know about Linux
download nuget package explorer release
https://github.com/NuGetPackageExplorer/NuGetPackageExplorer/releases
open nuget package explorer and add this directory 'lib/net45' it doesn't matter you have a .net app or not, I did this for my qt application otherwise it won't work.
add all files into this folder specify your version in the metadata
save nupkg file
download squirrel release https://github.com/Squirrel/Squirrel.Windows/releases
add squirrel to windows environment path
open cmd and cd to directory of nupkg file
squirrel --releasify file_name.nupkg -> now inide releases folder, there should be setup.exe file which will install app and other files.
to create new version do 2,3,4,7,8 again if its an update it will create delta file which is only needed file to update, put this files into your service directory for example in updates folder of your website which you need to disable directory browsing in IIS , and to auto-update application you need to call Update.exe which is in parent folder of application root directory appdir/../update.exe --update http://yourserver.com/upates/ after application restart app should start with new version
you can find documentation for squirrel in https://github.com/Squirrel/Squirrel.Windows/blob/develop/docs/getting-started/0-overview.md and nuget package explorer here https://github.com/NuGetPackageExplorer/NuGetPackageExplorer and you can use only nuget.exe too if you don't want to use nuget package explorer which can be used for dynamic generation of versions, which can be download from https://www.nuget.org/downloads
That easy. Now you have auto-update app which will download updates from the server and auto-update app. For more info you can read documentations.
note: for iis uses https://github.com/Squirrel/OldSquirrelForWindows/issues/205
I suggest you read on plugin and how to create and use them. If your application architecture is modular and be split into different plugins. Take a look at Google Auto Update utility http://code.google.com/p/omaha/. We use this.
Thibault Cuvelier is writing a tutorial (in French) to develop an updater. I know the explanations are in French (and everyone is not understanding French), but I think this can be readable with a web translator like Google Translate. With this you will have a cross-platform updater, but you need to write it by yourself.
For what I know, the only part of the updater that is explained in the tutorial, is the file downloading part. In the case this can help you, refer to the tutorial, Un updater avec Qt.
I hope that helps.
OK, so I guess I take it as a "no (cross-platform) way". It's too bad!
I have found a solution that can be automated with built-in self-extracting patches and updates. for windows. I have started using their sdk. take a look at the massive documentation here, https://agersoftware.com/docs/ the sdk is called securesdk and comes with their app, SecureDelta sdk. does a great job on any kind of files, better results than lzma-included delta updaters

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