gregstoll's posts

link friday: Syria, stack ranking at Microsoft, boo Texas National Guard
Mood: okay
Posted on 2013-09-06 10:55:00
Tags: links
Words: 329

- 9 questions about Syria you were too embarrassed to ask - a good primer.

- Your Labor Day Syria Reader, Part 2: William Polk - ignoring the "Labor Day" bit, this is a good long article making a case against attacking Syria. I honestly don't know where I stand on this anymore - at first I was for attacking, then I was against, now I'm "maybe if I shut my eyes the civil war will stop?"

- An inside anecdotal look at Microsoft's stack ranking and how terrible it is. It surprises me a lot that a high-tech company would do something like this - it seems like a way to fight "grade inflation" at the high cost of totally perverting every employee's incentives.

- Defying Pentagon, Texas National Guard Refuses To Process Benefits For Gay Couples - so they won't let you apply for benefits at a state facility, but after you apply at a federal one they have to provide you services anywhere. Congratulations, Texas National Guard, for making it very clear you don't like gay people!

- Hmm, I was going to link this dialect quiz, but it's offline at the moment. Anyway, here's my dialect map:

I was surprised how well it pegged me, although apparently people in Kansas City also talk like people in Houston...

- My Son Wears Dresses; Get Over It - hooray! This article made me forget about that gender studies book where everyone was terrible when someone didn't conform exactly to gender roles.

- From the Onion: Renowned Hoo-Ha Doctor Wins Nobel Prize For Medical Advancements Down There - classic!

- When Harvard Met Sally: N-gram Analysis of the New York Times Weddings Section - a cool look at how wedding announcements have changed over time.

- Minimum wage over the last 40 years, inflation-adjusted - after the fast food workers protests, I looked up an inflation-adjusted chart. Of course it's hosted at raisetheminimumwage.com, and the text indicates that it starts when the minimum wage was at its inflation-adjusted high; here's a chart that goes back further.

2 comments

Windows Phone: including ads in your app, and using In-App Purchasing to turn them off
Mood: cheerful
Posted on 2013-09-04 19:55:00
Tags: windowsphone wpdev
Words: 824

Free apps are wildly more popular than paid apps, but some people (myself included) get annoyed at ads in apps. To get the best of both worlds, you can include ads in your free app but let people in-app purchase a way to turn them off. I've done this in two apps now (HospitalPrices, and SatRadioGuide), and here's how to do it!

Note that this is for Windows Phone 8.0 - here's a similar guide for Win/WP 8.1 Universal apps.

Part 1: Adding advertising

I'm going to use the Nokia Ad Exchange, although there are other choices such as Microsoft pubCenter, Ad Exchange, etc. You can also use the Ad Rotator to switch these on the fly and rotate between them.

This will be a fairly brief guide - see this guide on the Nokia Developer Wiki for a more thorough one. Honestly, if I had found that one first I would have just linked to that and skipped to Part 2, but it seems a shame to waste all these words!

1. Sign up for an account at nax.nokia.com. Under the SDKs tab, download the SDK for the versions of Windows Phone you'd like to target. Unzip the SDK - you'll find some documentation as well as Inneractive.Ad.dll. Under the Add App tab, create a new AppID (it's OK to leave the description and download link blank for now).

2. In your Windows Phone project, right-click on References, and click Add Reference. Go to the Browse section, and browse to the Inneractive.Ad.dll you unzipped from the SDK. Make sure the following permissions are set in your WMAppManifest.xml:
- ID_CAP_NETWORKING
- ID_CAP_WEBBROWSERCOMPONENT
- ID_CAP_PHONEDIALER
- ID_CAP_IDENTITY_DEVICE

If you want location-based ads, see the documentation.

3. Wherever you'd like to put an ad in the app, use the following XAML:



<ad:InneractiveAd 

 xmlns:ad="clr-namespace:Inneractive.Nokia.Ad;assembly=Inneractive.Ad"

 AppID="<your ad ID>" AdType="IaAdType_Banner"

 ReloadTime="60" Name="Ad" />

See the documentation if you'd like to customize this further.

--

Now the ads in your app should be working! Launch it and make sure that they appear and don't obscure any content.

Part 2: Using In-App Purchasing to Disable Ads

Note that in-app purchasing is only possible in Windows Phone 8 apps. For Windows Phone 7 apps, you can use a similar technique and only show ads in the trial version of an app.

1. Log in to the Windows Phone Dev Center, click "Dashboard" (at the top), then "Submit App" on the left. Under the "App info" section, give your app a name and category, then Save. (you can change these when you're ready to submit for real) Go back to the dashboard, select your new app, and go to the "Products" section. Click "Add in-app product". For the product info, specify whatever you want for the product alias (I usually use "<your app name>-NoAds") and "NoAds" for the product identifier. Set the type to "Durable", select the price, and click Save. Then specify a title and description - for the icon, feel free to use this:

(click for full-sized image)

Finally, submit the product. Since your app isn't published yet, it won't be visible to anyone else

2. Either create a Utils class or add this code to an existing one:



public static bool ShowAds { get; set; }

public static void UpdateInAppPurchases()

{

    ShowAds = true;

    var allLicenses = Windows.ApplicationModel.Store.

        CurrentApp.LicenseInformation.ProductLicenses;

    if (allLicenses.ContainsKey("NoAds"))

    {

        var license = allLicenses["NoAds"];

        if (license.IsActive)

        {

            ShowAds = false;

        }

    }

}

In App.xaml.cs, add a call to Utils.UpdateInAppPurchases() to the Application_Launching() and Application_Activated() methods.

3. Find all of the ads you added in XAML, and add Visibility="Collapsed" to them. Then, to each page that has an ad, add this method:



public void UpdateAd()

{

    Ad.Visibility = Utils.ShowAds ? Visibility.Visible : Visibility.Collapsed;

}

and add a call to UpdateAd() to the OnNavigatedTo() method.

4. All that's left now is to add the option to remove ads from inside the app. If you'd like to add a menu item in the app bar, you can add the following XAML:



<shell:ApplicationBar.MenuItems>

     <shell:ApplicationBarMenuItem Text="remove ads" Click="RemoveAds_Click"/>

</shell:ApplicationBar.MenuItems>

Or, you can add a button in your about page, or both.

Then, add the event handler:



private async void RemoveAds_Click(object sender, EventArgs e)

{

    try

    {

        await Windows.ApplicationModel.Store.CurrentApp

            .RequestProductPurchaseAsync("NoAds", false);

        UpdateAd();

    }

    catch (Exception)

    {

        // oh well

    }

}

Finally, to remove the menu item from the page if the user has already removed the ads, add this code to your UpdateAd() method:



// if we add more of these, we'll need to be more clever here

if (!Utils.ShowAds && ApplicationBar.MenuItems.Count > 0)

{

    ApplicationBar.MenuItems.RemoveAt(0);

}

--

To test the in-app purchasing code, you'll need to publish your app as a beta. (all in-app purchases are free in a beta) But, other than that, you're done!

References: Windows Phone blog post on In-App Purchasing

In-App Purchase: Success stories and Tips to test common in-app failure scenarios

--

See all my Windows Phone development posts.

I'm planning on writing more posts about Windows Phone development - what would you like to hear about? Reply here, on twitter at @gregstoll, or by email at ext-greg.stoll@nokia.com.

--

Interested in developing for Windows Phone? I'm the Nokia Developer Ambassador for Austin - drop me a line at ext-greg.stoll@nokia.com!