I've created Google App Engine project in Java using Eclipse following the book Beginning Java Google App Engine
Before I bought this book I had created projects with unchecked option 'Use Google Web Toolkit' but for this project I checked it (following the book)
Eclipse generated several files for me and I run my applications, copy link to Web Browser (http://localhost:8888) and it gives me an error:
GWT module name_of_my_project may need to be (re)complied
I work on Ubuntu 10.04 (I was testing my application using Firefox and Chromium) and I was trying run my application on Windows XP (using the same Web Browsers) with the same effect (just one difference - Google Chrome made me install Web Toolkit...so I did it but it still gives the same error)
Thanks in advance :)
I get the same error message at unexpected times using development on IntelliJ with Chrome. The message still appears when I stop and start development mode. The problem is fixed after I delete the compiled files (class files, js files) in the out folder. On eclipse, you can try deleting files and folders generated in the war folder (delete the folder that has the project name, if it exists, and the classes folder under /war/WEB-INF/classes). Hope this helps.
Check in your "Java Build Path" if you have the correct Default output folder (something like /target/project-name/WEB-INF/classes).
In Eclipse, do a "Clean Build".
Click on the google blue button in the Eclipse menu and select "GWT Compile Project..."
Make sure the GWT plugin is compiling your project by checking the compiler output. The GWT compiler outputs lots of things, for example you will always see something like "Compiling 6 permutations.... Compiling permutation 0..."
If you still have problems, try this page on setting up Eclipse with GWT: http://code.google.com/webtoolkit/usingeclipse.html
Thanks for your comments and suggestions. I re-installed Eclipse on Ubuntu and I installed plugin one more time and it works :)
So, be careful which version of Eclipse you use - Eclipse 3.4 has problem with GWT.
Related
I use Phonegap Desktop and Phonegap Developer app for a while now. This is really interesting for quickly testing my development.
But I'm facing a limitation with the embedded barcode scanner which is displaying the camera display in full screen.
I need to embed the camera display into a container so I have space for displaying information in the same time.
After searching for a while, I've discovered the Scandit SDK for PhoneGap was the only plugin which allows cropping the camera display.
I spent a lot of time trying to implement Scandit, but no success. At least I can build the app, but when using it, scanner is not working...
Here are the steps I've followed:
clone the PhoneGap Developer project from Git
Install using npm
add ios platform
open the xcode project file
build the application and run it on device
=> At this time the PG Dev is running well and my application is working fine
Then, i continued:
remove all reference to the default barcode scanner plugin
build the application and run it on device
==> PG Dev still working fine and my application is working fine
Next steps:
clone the Scandit phonegap plugin from Git
download the Scandit SDK from my scandit account
put the SDK into the cloned scandit phonegap plugin
modify the plugin.xml to change the path to the bundle and framework (mismatch of version name in the path)
<resource-file src="src/ios/scanditsdk-community-ios_4.16.1/ScanditBarcodeScanner.bundle"/>
<framework src="src/ios/scanditsdk-community-ios_4.16.1/ScanditBarcodeScanner.framework" custom="true"/>
copy bundle and framework into the correct folder of scandit
modify the config.xml to include reference to Scandit and set the spec attribut to the version of the SDK
build the application and run it on device
==> PG Dev still working fine and my application is working fine (it doesn't use scandit for the moment)
Next steps:
Remove my project from PhoneGap desktop
add Scandit Sample project to PG Desktop
I used the "Continuous Scaled/Cropped" example from there: http://docs.scandit.com/4.12/phonegap/cordova-examples.html
add my App Key for the license
launch my PG Dev app on my device and download the project files
==> PG Dev is running fine and download the Scandit Sample App.
But the app doesn't work. When clicking on the scan button, nothing happends..
After some investigation, I found that I ran through an exception on Scandit class.
Adding a try on the command 'Scandit.License.setAppKey' allowed me to report in the PG Desktop log the following error:
ReferenceError: Can't find variable: Scandit
Adding this try/catch made the app raising an exception at the next line:
var settings = new Scandit.ScanSettings();
After searching the web about my error, and some posts were suggesting to manually add the framework and bundle into xcode.
So I did it by drag&droping the framework and bundle into the framework folder of the xcode project.
But when I try building my project, it is failing with many errors...
To solve it, I had to had manually all the scandit plugin files (*.h and *.m) into my xcode project.
All previous errors have been solved, but new ones appeared.
This was due to some other missing native ios frameworks...
Once these framework added, all errors were solved and I managed to successfully build the application.
But when running it, I'm still having the error: "ReferenceError: Can't find variable: Scandit"
I'm now running out of idea..
What did I do wrong?
Is there anyone having managed to build a PG Desktop with Scandit embedded?
Thanks.
Sorry for this long post, just tried to be the more precise I could be.
The issue here is two fold. First you need to be aware that the Scandit Barcode Scanner plugin makes use of native code and can therefore not be used in the Phonegap Developer app, as the only thing transmitted to it is your html/css/javascript and the javascript part of the plugin. To also include the native parts of the plugin you have to build and deploy the project yourself. As you are trying to build the XCode project it seems like you are now doing this.
The second part is that you are way overcomplicating the adding of the plugin. There is no need for you to manually clone the git repo, add our libraries, adjust paths in the plugin.xml etc. You can directly download the entire plugin as a zip from your account at scandit.com where the library is contained and the plugin.xml is correct. After that you can simply add the plugin to your project through the CLI (also see our documentation for this at http://docs.scandit.com/stable/phonegap/cordova-integrate.html) and there is no need to do anything manually unless you are using a very outdated Phonegap version that fails to properly handle the plugin.xml. Doing it the automated way with our properly prepared plugin zip will remove most error sources, please try it that way.
Thanks #moritzha. It helped me finding the solution.
I followed this doc at the beginning but it was not working.
After adding the plugin and building the application, I never managed to see it in my xcode project.
I took the opportunity of changing my mac to restart everything from scratch, and after many tries I found where I was wrong.
In fact, the documentation provided by scandit is missing one step.
The command ' phonegap plugin add < path to downloaded and unzipped plugin > ' is doing half of the job.
The command is correctly copying the plugin files to my project but it is not updating the config.xml.
So before building your application, you have to edit the config.xml located at the root of your project folder.
You need to manually reference the plugin with the following:
and replace the x by the version of the sdk you will use.
Once the config.xml updated, you will be able to build the app for your targeted platform.
I now have my own version of the Phonegap Developer App with the Scandit plugin in place of the default barcode scanner plugin. And it works perfectly.
This plugin is awesome!
PhoneGap Developer App version: 1.7.2 (taken on Github)
I've search in vain for about a month now and I can't get my PHP application pushed to Google App Engine, for the PHP platform. I've got the Java version set up nicely on my computer. I followed the instructions for GAE PHP here: https://developers.google.com/appengine/docs/php/gettingstarted/introduction
..but it's really confusing because it essentially tells me to install Eclipse made for PHP which is Luna, but the only versions of Eclipse that GAE supports is Kepler, Juno and Indigo (https://developers.google.com/eclipse/docs/getting_started), so I'm super confused.
I don't think you can install two different GAE plugins on a standard version of Eclipse (which is what I use for the Java GAE plugin).
I also tried (in vain, but it was worth a shot) to upload my app using my Java plugin/setup and obviously this was a terrible idea because all it does is just print the php script/code to the browser.
Any thoughts, brothas/sistas?
I have figured out how to push php files to GAE. There are essentially 3 ways.
Use appcfg.py. Run following command:
--appcfg.py update helloworld/, where helloworld is replaced by the name of the folder containing your project files. Make sure the path is relative to appcfg.py directory or an absolute path.
--Enter your Google username and password at the prompts.
**2. Use the App Engine Launcher, probably found in C:\Program Files (x86)\Google\google_appengine\launcher. Executable is called GoogleAppEngineLauncher.exe. Simply select the project in Launcher and click Deploy.
**3. Use Git. Create a local repository on your machine. Add a repo to your Github account, and follow these instructions: https://developers.google.com/appengine/docs/push-to-deploy#creating_a_cloud_project
**4. Use PhPStorm. Download PHPStorm for free for 30 days, or buy a student version/whatever version you quality for here: . Then follow these instructions: http://confluence.jetbrains.com/display/PhpStorm/Getting+Started+with+PhpStorm+as+Google+App+Engine+PHP+IDE. The only thing I haven't figured out is #5 - where to find the php-cgi.exe file. I can't provide a path for a file I don't have.
** denotes super easy and I have used successfully.
The Google Plugin for Eclipse is only for Java applications. For PHP applications, you'll want to use the Python/PHP SDK and either the command-line tools or the Launcher UI app for running the development server. You can still use Eclipse for editing your PHP source files.
RE #5 - "I can't provide a path for a file I don't have".
That was also my problem.
They are fond of pointing out that the SDK directory should contain dev_appserver.py and ‘google’ and ‘php’ packages but you don't find those in a simple search cause they are invisible. You have to muck through the installation directory.
I am using Indigo on a Mac Pro (10.9.1). I updated to Java1.7 in order to run some updated Google Play Service samples. Under Installed JREs, JAVA7 is shown as the only and default choice, which points to the new Java path. But when I start Eclipse, it started complaining that "JRE version is 1.6.0; version 1.7.0 or later is needed to run Google plugin for Eclipse".
I tried to add the vm option in eclipse.ini, i.e. I added
-vm
/Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Contents/home/bin/java
above "-vmargs" as described here: http://wiki.eclipse.org/Eclipse.ini.
It doesn't make any difference though. Since then, I have uninstalled GPE from Eclipse and installed them again via "install new software" from https://dl.google.com/eclipse/plugin/3.7. Still the same problem. Under Google->App Engine, there is an error message "Failed to initialize App Engine SDK (path)". This points to appengine-java-sdk-1.8.9.
I have checked my Java version using all means I am aware of, i.e. from run Java -version, using Java's control panel, output from code... They all show I am using Java 1.7.0.51.
Any help is appreciated!
Edit: Google has provided a solution that works great. Add this argument in eclipse.ini
-vm
/Library/Java/JavaVirtualMachines/jdk1.7.0_WHATEVERTHESUFFIXIS/Contents/Home/jre/lib/server/libjvm.dylib
Make sure that eclipse Is compiling your project to 1.7 specifications. Even though you have 1.7 selected as your virtual machine, it might be compiling to 1.6. It's in the eclipse project settings
I need to push my gwt application to android via using phonegap.I followed http://code.google.com/p/gwt-phonegap/wiki/GettingStarted and this tutorial http://blog.ic3man.gr/?p=120 . But when i run the application i get error gwt application must be recompiled .
These are steps i followed
compile the gwt application
2.create a phonegap project in android as stated in Getting started
3. move the war directory of gwt application to android project
4. pointed the .nocache.js file as index for android app.
Please let me know where i am going wrong!
normally when you get such an error your nocache.js file does not match your compiled javascript.
This might happen if you are using maven and eclipse with google eclipse plugin together and haven`t properly selected the right folders for your war folder and the compile folder.
Maybe you need to read: http://code.google.com/p/google-web-toolkit/wiki/WorkingWithMaven
I fixed this issue,I use Eclipse IDE,and on right clicking Project option called Google has GWT Compiler,it generates all possible js. Now run the Project,and it worked fine for me in android via Phonegap-gwt ! Hope it helps someone!
I've installed the Google Plugin for Eclipse 3.4 and it seems to work fine.
But when I start a new Web Application Project, it wants me to configure the Google App Engine SDK. I click on Add App Engine SDK, but it doesn't recognize my (valid) GAE SDK. It comes back with "Failed to initialize App Engine SDK at %path", no matter what path I give it.
Are you trying to use the Java or Python SDKs, and are you sure you downloaded the right one?
If Python, remember that the Google Eclipse plugin is currently Java-only.
Does your SDK run if you start dev_appserver from the command line? I had a similar problem once and it was because the script wanted to ask me about automatically checking for updates - once I'd answered the question and exited the appserver I was then able to add it to Eclipse.
Have you checked your "path" environment variable to include
;C:\Program Files\Google\google_appengine\
I had this issue. I downloaded the java zip package and extracted it manually but it turned out that the zip file was either corrupted or messed up during the extraction. Regardless, downloading the package again and re-extracting it fixed the problem for me.
Also, if you are on Python use the PyDev plugin for eclipse and start a Google AE project that way. Use the Google Eclipse plugin for GWT, Java->Js stuff.