How to implement Leader Boards in Windows Phone 8 games developed in XAML and C#. Apple has a game center. Is there anything available for Windows Phone 8 like that? Users should be able to submit their scores using their live account.
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I thought of an app to upload photos when they are taken. How do I notify my app when a photo has been taken in wp8 programmatically? Are there anything similar to intents in android? In android, I would listen for an intent when a photo has been taken and get that photo. In my windows phone 8 application. how do I get the system to notify my application when the photo has been taken and process it?
There is a specific API since Windows Phone 8 that allows auto-uploading photos for third-party apps: Auto-upload apps for Windows Phone 8 (MSDN)
Maybe this is not exactly what you are looking for since the agent will only launch under certain conditions and not immediately when a new photo is taken. For example, Wi-Fi and an external power source are required, in order to reduce the battery drain.
However that's the only viable solution for auto-uploading photos in a background task.
I've developed a Windows 7 app using the Surface SDK for a POS application (ordering drink/food from your table using tactile screen).
I'd like to start migrating to using a Metro App, as I fear the Surface SDK will die soon (and I'd like the app to evolve).
My biggest issue, concerns Windows 8 and how to "lock" it for public usage.
Basically I'd like the machine to boot and run my metro app, and of course prevent the user from accessing the OS using charms or other gestures.
I know how to secure a Windows 7 and older, but somehow the new metro system feels like it's going to be harder to do such a simple task.
I do believe the same GPO on Windows 7 is applicable to Windows 8 as well, with a few exceptions. There are some discussions on the net which I found useful (I needed to lock down a few Windows 8 tablets and these got me going). The only problem is that I haven't figure out how to lock down an RT tablet.
Windows 8 Tablet Lockdown
Discussion on locking down windows 8 start screen
In addition to GPO, something else we've done for touch devices(in our case Surface Pro) is build a custom enclosure that overlaps all the screen edges(so you're putting the device in a case but the case covers up a bit of the touchscreen) so users' can't bring up the Charm menu, switch apps or use the "Microsoft" button. You can turn off switching from previous app by swiping from the left in the OS.
It is a bit severe but you are putting it in a public setting so I imagine you were planning to put it in an enclosure anyway.
is it possible to get the textual ratings from the windows phone 8 market via the api?
I know that I can get the apps in the market but don't know if the other thing is possible
I think you can call to the MarketplaceDetail Launcher like MSDN exposes.
I have downloaded the Metro Style Application Sample that is available on the Microsoft Web Site. There are lots of examples that shows how you can interact with the hardware device (sensors,gps,etc). I have of course downloaded the Windows 8 Developer preview to execute those examples. My question is : how can I test those samples that uses the device hardware (gps, accelerometer) or that accesses to the phone features (sms,etc) using the emulator?
At the moment there are not devices that support windows 8 (the first phone will probably come out this autumn) ?
I'd like to start to develop some metro style applications to be ready when windows 8 store will be online but using just the emulator is a big limitation isn't it?
Yes and no. There are slate devices that can run the Windows 8 Dev Preview just fine.
If you are unable to get one of these, one option is to create your own interfaces for all the devices. Underneath you can have two implementations.
First one, you connect to the actual underlying devices via the Windows 8 APIs. Sure you won't be able to test these until you have a device but such is life.
The second implementation can be a dummy one. For example, you can have a thread running and every 2-3 seconds publishing some GPS event.
That way you at least have some dummy device data coming in that you can test with for the time being.
I am using the DataGrid in my windows phone 7 app and I am pleased with the way it looks but I wanted to know?
If we use DataGrid in windows phone 7 app will it create any objection in certification of my app?
Is Datagrid Against the UI guidelines of windows phone 7 app Certification?
It really depends on how you've implemented the DataGrid ... there's lots of good metro looking DataGrids within metro style windows apps, so it can be done well.
As for their guidelines and rejecting your app ... their guidelines are just that; guidelines ... there's many apps that don't look like good "Metro" apps, but they still make it into the marketplace, so you should be fine.
Basically you should be more worried about creating a create experience for your users, if you do that your app will do well.