I have made my own application in J2me to my mobile phone. The previous versions of this application works perfectly. But now (after a few changes in source code), when I copy this appplication to my mobile phone (Smasung gt-s7550) I get: Java error. Invalid format and the application doesn't start.
Do you know what it means?
invalid format can mean all kinds of different things. Without seeing any code, my guess would be a missing semi-colon or something to that effect.
Related
I just started experimenting with the .NET framework and I noticed that when I run:
dotnet list packagein the JavaScript Debug Terminal of VS Code I get all my packages as I should but they have strange Links attached to some of them that lead to scam sites.
ex:
> Windows.EntityFrameworkCore.SQlite --> ww1 .entityframework.com which is a shitty site pretending to be .NET hiring developers.
....
enter image description here
I tried running anti virus scans and cleanups. Nothing detected.
I tested on PowerShell, GitBash and Cmd terminals. Nothing, only happens in the JavaScript Debug Terminal
I tried disabling all my VS Code extensions (including the built-in ones) except the JavaScript debugger to see if its coming form another extension. Still there.
I have heard of extension vulnerabilities and VS Code Hacks but this is a built-in plugin.
Has this happened to anyone?
VSCode is configured to attempt to parse strings from any output that could represent a valid URL and present the option to you as a clickable link for convenience.
Since .tools is a valid TLD, it thinks the string Microsoft.EntityFrameworkCore.Tools is referencing the URL http://microsoft.entityframeworkcore.tools/ which it seems has been parked by an unscrupulous individual or organization. You as the developer should understand that this is a namespace reference and not a URL, and thus there is no value in clicking it.
This is not indicative of any sort of malware or any real malfeasance.
I just started learning about Android development, so this one is a serious issue for me: I launch Android Studio (2.2.2, but had the issue since 2.2.1) on Win10, make a New project, just keep clicking Next without changing anything (selecting Empty Activity as the template), Finish, try to Run 'app' on my phone and consistently get this error:
Error while executing: am start -n "com.example.android.myapplication/com.example.android.myapplication.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.example.android.myapplication/.MainActivity }
Error type 3
Error: Activity class {com.example.android.myapplication/com.example.android.myapplication.MainActivity} does not exist.
Error while Launching activity
Being a complete newbie who was just supposed to change some text in XML and run the app on a phone, I have no idea what to do or edit to make a pregenerated app actually work. I searched StackOverflow for a more general approach to these errors and tried:
Restarting AS/computer
Disabling InstantRun
Messing with Clean/Rebuild/Synchronize/Sync with Gradle
Deleting .gradle and .idea folders and Syncing with Gradle
Some other obscure shenanigans with build.gradle and AndroidManifest
Various combinations of the above.
... None of which worked (or affected the problem in any way, in fact).
Other observations:
The app isn't even installed (checked All apps, there isn't any com.example.android.myapplication or MyApplication app on my device)
On the development course forum, it was suggested that com.example.android.myapplication/com.example.android.myapplication.MainActivity should only read com.example.android.myapplication/MainActivity. So far I haven't been able to figure out how to change that.
Update 1 New attempted fixes (neither of which worked):
Specified activity directy in Run/Debug window.
Specified no activity whatsoever (doesn't show that error, but doesn't run anything either).
Did File/Invalidate Caches
Changed android.intent.category.MAIN to all-lowercase and back.
Added "category android:name="android.intent.category.DEFAULT"/" to Manifest
Update 2 Managed to run the app on emulator. It seems to be working there, so the error will likely be somewhere between AS and the phone (Android 5.1.1, API 22).
Developer options and USB debugging are on (confirmed the pop-up message, too)
Driver is up to date (AS can see the phone without problem)
Phone is on (and not asleep) while I'm trying to run the app
Any suggestions why the phone won't download and run the app?
In your manifest file edit
with android:name="com.example.android.myapplication.MainActivity"
Make sure that your code doesn't mean any nonsense and that it wouldn't cause the app to crash, which is sometimes the problem. Try finding a problem in code which could crash the app. Maybe in your crash log you can find what causes the crash. Good luck fixing that.
According with your error log I suppose you did not delete previously installed app. See my accepted answer on the same question for details.
I took over this 4.0 webforms website and got the exact same code from the former developer.
It runs fine on his local machine, but it craps out on my local machine having anything to do with the “System.Web.Security” namespace.
If I put a breakpoint where it is failing and try to fall into the code for that namespace, it won't let me go any further. It just simply will not execute anything to do with the namespace. This happens with all of the three major browsers
Since this forum does not allow any attachments, I can't show you anything more.
Does anybody have any ideas what is wrong?
Turned out to be a simple permissions issue on our end not allowing my id to have access to the database.
In my j2me app that is signed by veriSign, has problem in accepting the always or yes permissions the time it has to perform PIM.getInstance().openPIMList(..) action.
When my app perform below line of code very first time of it's installation it hangs and doesn't show up the main screen rather a black background hanged screen. When I exit and restart the application it runs normally without any problem even if I delete it and put it back again and runs fine, except I delete and restart the phone and try to run it again it shows the same problem I described above.
My code of line that causes to ask permissions is here that actually also causes the problem. One more thing this error only occurs on specific phones which actually allow ALWAYS permission on start.
I am checking it over Nokia X2-05 and it shows problem but on Nokia C3-02 it doesn't as it doesn't allow ALWAYS permission automatically on start of app.
private void permissionSettings() throws PIMException {
PIM.getInstance().openPIMList(PIM.CONTACT_LIST, PIM.READ_WRITE);
}
Above is code snippet that hangs at first start.
It sounds like a bug on the handset to me, the TCK tests used to verify j2me libraries are pretty weak so lots of bugs like this find their way through.
It seems that the key is in the permissions, so I would try and play around in this area. Make sure you have the right permissions set in the .jad (before signing), if you can get hold of one try to sign with a certificate in a different security domain or certificate, try changing the permission level before running the applet.
I would expect that you'll only be able to work around the problem, so rather than suggest something specific I would be varying things within those areas.
I've been trying to make my application run at startup on windows CE 6.0, unfortunately since the device (YFAtlas4) is customized by manufacturer I'm unable to place shortcut in \Windows\Startup. (for some misterious reasons)
So now I'm trying to place path to my application in Hklm\Init registry key, and here's my problem: I's there a way to place absolute path there ? In every example that I've seen there's only application name, and my application has to be instaled in \ResidentFlash\ folder.
Did you try to put the full path there?
There should not be any problem doing so.
If you edit your registry using code, then the string you want to store is L"\\ResidentFlash\\AppName.exe". Alternatively, in case you have an ActiveSync connection with the device you can use a remote registry editor and not mess with the double backslashes.
Also, since you are using the HKLM\Init functionality - make sure your application calls SignalStarted so other programs that are dependent on it can start as well.
A fully qualified path should be supported jusy fine. Be aware that if the path has a space in it, you'll need to quote delimit it. Also, if it's a Compact Framework app, it's not as simple as just adding your app to the Init key - often that will fail. See this blog entry on getting CF apps working with the Init key.