Blank Screen After Splash Screen - windows-phone-7

I am new to windows phone development. In windows phone a blank screen is coming after a splash screen. I am using phonegap to build the app with windows. I tried it with different small applications but it is not working. what could be the reason I have googled it for an hour.

About flow: take a look here and here.
About blinking: can you provide some code? It is not a common behavior for wp app.

I was giving the wrong reference to the cordova.js file. I change the reference to the root directory of the project. After that it is working fine.

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What is the reason for xamarin app style change?

I'm from Ukraine, so I immediately apologize for my crooked English. I got one very incomprehensible problem with which I can not figure it out. I have created a mobile application for Android and IOS. Absolutely normal application. I tested it on the emulator on several phones. But on one of them, the app didn't look like itself. For some reason it became dark and looked strange (I attached the screenshots). The normal version is white-green, this version was dark. I can't figure out what is the reason. Immediately I will say that the phone is normal and the light theme is enabled on it, the phone has standard settings. And everything else on this phone except this application is displayed normally. Please tell me what is the reason
I tried to change the themes and settings of the phone, and found out that the problem is definitely not in them
enter image description here

How to do a Flutter Firebase app for both Mobile and Desktop at the same time

I see many samples and videos on how to do firebase for mobile and they call this "multiplatform". However, I don't see much on the desktop. There is one video on firebase flutter Windows by using a web and it seems to work. However, I do not see any tutorials for both mobile and desktop. Firebase would be a great example on syncing between desktop and mobile. We have such an app in development right now. Desktop development is new, but I'm surprised how little there is.
There is a library called firebase_dart, but the documentation seems weak.
The package firedart with the video listed above works in both desktop (linux and android without much modification..
What needed to be modified?
I had difficulty with the button on the very top of the phone, so I
added a sized box.
I had difficulty with debugPrint or print so I
added a Text widget with the results (to string).
That also worked.
Although I would like to not use fluent_ui, it does work for both desktop and mobile. I'm not sure what to do with realtime db, but I think I can make the firedart work for user sync between mobile and desktop.
It would be better if I could get firebase_dart to work.
https://www.youtube.com/watch?v=Tw7L2NkhwPc

Not able to debug phonegap app running on windows 8 mobile

I have a phonegap application that has some layout problems. I can run the app in browser for the most part, and this usually get me over the line. But with a new design I need to debug the application layout on windows phone 8.
I'm currently looking at weinre but its not showing anything on the desktop when browsing the local server, I have added the link to my application I have cleaned up everything I can think of. Still blank. Any good tuts around the ones I have read just copy and paste the original docs or are not on my same error.
There's a public weinre server available here:
https://the-weinre.herokuapp.com/
You may have better luck with that than with your local server. There's a demo available on that page, give that a try and see if it works on your windows 8 mobile device.

Showing white screen after splash screen in window 7 phonegap

I am developing apps for window phone 7 using phonegap. I am facing the problem when launching the apps in emulator. I can see the splashscreen but not the index page. I just see the white blank screen after splashscreen. While running on emulator I got message "this computer do not have required graphics processing unit configuration."
I test with other in built apps with visual studio for window phone. It work fine.
What is the problem? With my graphics or something else.
Did you set up your app to launch index.html. If you have change the tree it's not a problem. You can change it in CordovaLib, CordovaView.xaml, CordovaView.xaml.cs. In this one, you will find StartpageUri. Be sure that is pointing on your file

The parameter is incorrect exception

I'm working on a Windows Phone 7.1 project and got most of my work done and decided to add to the project the images for my tiles (62x62 and 173x173 PNGs) plus the JPG file for the splash screen (SplashScreenImage.jpg 480x800).
Before adding these images to the project my project was running fine! After adding them and setting the tiles images to the 2 new files, my project still builds ok, but when running on the 7.1 simulator (my acer laptop doesn't have hardware assisted virtualization enabled in order to run the wp8 emulator) the app crashes when trying to load MainPage with "The parameter is incorrect" exception (in the Application_UnhandledException handler).
I've been trying to find a solution on the web for the last 1-2 days, found few mentions of this error and few possible causes, but none of my findings helped so far. The exception doesn't say anything helpful and it's getting really frustrating considering that most of the serious work is done and I'm very close to releasing the app to the marketplace.
Did anybody run into this issue before? Any ideas what could have gone wrong and how I could solve this exception? Any help is much appreciated!
Thank you in advance!
Andrei
Whenever I wish to change the Splashscreen and other images, here is what I do:
Locate the file on disk using Windows Explorer.
Open the file using some image editor (I use Paint.NET)
Remove the default image and replace with your image maintaining the dimensions.
Save the image and return to Visual Studio.
Rebuild the entire project.
This works seamlessly without any errors. ;)

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