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Cover image for Tutorial for using Xamarin.Google.UserMessagingPlatform (GDPR) for Google AdMob
Federico Navarrete
Federico Navarrete

Posted on • Originally published at supernovaic.blogspot.com

Tutorial for using Xamarin.Google.UserMessagingPlatform (GDPR) for Google AdMob

Loading the GDPR for Google AdMob is a tricky business in Android because Google's Documentation is quite unclear, and the steps are quite messy.

Now, the steps are the following ones:

AdMob Section

1) Go to your AdMob account.

2) Go to Privacy & Messaging and choose the phone icon.

privacy

3) Create a new message and fill in the required information.

new message

4) Configure your message:

message

5) Add your privacy policy for your app:

privacy policy

6) Save it and publish it.

C# Section

1) Download the Xamarin.Google.UserMessagingPlatform from NuGet.

2) Double-check that your AndroidManifest.xml has these two lines:

<activity android:name="com.google.android.gms.ads.AdActivity" android:value="AD_UNIT_ID" android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" android:theme="@android:style/Theme.Translucent" />
<meta-data android:name="com.google.android.gms.ads.APPLICATION_ID" android:value="APP_ID" />
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You can get AD_UNIT_ID and APP_ID from your AdMob account:

ad unit id

app id

3) Load/copy the GDPR code after this line (do not do it before!):

MobileAds.Initialize(this);
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4) Copy and paste this code (based on JimChapman-4399's version):

private void SetGDPR()
{
    Console.WriteLine("DEBUG: MainActivity.OnCreate: Starting consent management flow, via UserMessagingPlatform.");
    try
    {
#if DEBUG
        var debugSettings = new Xamarin.Google.UserMesssagingPlatform.ConsentDebugSettings.Builder(this)
        .SetDebugGeography(Xamarin.Google.UserMesssagingPlatform.ConsentDebugSettings
                .DebugGeography
                .DebugGeographyEea)
        .AddTestDeviceHashedId(Android.Provider.Settings.Secure.GetString(ContentResolver,
                                            Android.Provider.Settings.Secure.AndroidId))
        .Build();
#endif

        var requestParameters = new Xamarin.Google.UserMesssagingPlatform.ConsentRequestParameters
            .Builder()
            .SetTagForUnderAgeOfConsent(false)
#if DEBUG
            .SetConsentDebugSettings(debugSettings)
#endif
            .Build();

        var consentInformation = Xamarin.Google.UserMesssagingPlatform.UserMessagingPlatform.GetConsentInformation(this);

        consentInformation.RequestConsentInfoUpdate(
            Activity,
            requestParameters,
            new GoogleUMPConsentUpdateSuccessListener(
                () =>
                {
                // The consent information state was updated.
                // You are now ready to check if a form is available.
                if (consentInformation.IsConsentFormAvailable)
                    {
                        Xamarin.Google.UserMesssagingPlatform.UserMessagingPlatform.LoadConsentForm(
                            this,
                            new GoogleUMPFormLoadSuccessListener((Xamarin.Google.UserMesssagingPlatform.IConsentForm f) => {
                                googleUMPConsentForm = f;
                                googleUMPConsentInformation = consentInformation;
                                Console.WriteLine("DEBUG: MainActivity.OnCreate: Consent management flow: LoadConsentForm has loaded a form, which will be shown if necessary, once the ViewModel is ready.");
                                DisplayAdvertisingConsentFormIfNecessary();
                            }),
                            new GoogleUMPFormLoadFailureListener((Xamarin.Google.UserMesssagingPlatform.FormError e) => {
                            // Handle the error.
                            Console.WriteLine("ERROR: MainActivity.OnCreate: Consent management flow: failed in LoadConsentForm with error " + e.Message);
                            }));
                    }
                    else
                    {
                        Console.WriteLine("DEBUG: MainActivity.OnCreate: Consent management flow: RequestConsentInfoUpdate succeeded but no consent form was available.");
                    }
                }),
            new GoogleUMPConsentUpdateFailureListener(
                (Xamarin.Google.UserMesssagingPlatform.FormError e) =>
                {
                // Handle the error.
                Console.WriteLine("ERROR: MainActivity.OnCreate: Consent management flow: failed in RequestConsentInfoUpdate with error " + e.Message);
                })
            );
    }
    catch (Exception ex)
    {
        Console.WriteLine("ERROR: MainActivity.OnCreate: Exception thrown during consent management flow: ", ex);
    }
}

private Xamarin.Google.UserMesssagingPlatform.IConsentForm googleUMPConsentForm = null;
private Xamarin.Google.UserMesssagingPlatform.IConsentInformation googleUMPConsentInformation = null;
public void DisplayAdvertisingConsentFormIfNecessary()
{
    try
    {
        if (googleUMPConsentForm != null && googleUMPConsentInformation != null)
        {
            /* ConsentStatus:
                Unknown = 0,
                NotRequired = 1,
                Required = 2,
                Obtained = 3
            */
            if (googleUMPConsentInformation.ConsentStatus == 2)
            {
                Console.WriteLine("DEBUG: MainActivity.DisplayAdvertisingConsentFormIfNecessary: Consent form is being displayed.");
                DisplayAdvertisingConsentForm();
            }
            else
            {
                Console.WriteLine("DEBUG: MainActivity.DisplayAdvertisingConsentFormIfNecessary: Consent form is not being displayed because consent status is " + googleUMPConsentInformation.ConsentStatus.ToString());
            }
        }
        else
        {
            Console.WriteLine("ERROR: MainActivity.DisplayAdvertisingConsentFormIfNecessary: consent form or consent information missing.");
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine("ERROR: MainActivity.DisplayAdvertisingConsentFormIfNecessary: Exception thrown: ", ex);
    }
}

public void DisplayAdvertisingConsentForm()
{
    try
    {
        if (googleUMPConsentForm != null && googleUMPConsentInformation != null)
        {
            Console.WriteLine("DEBUG: MainActivity.DisplayAdvertisingConsentForm: Consent form is being displayed.");

            googleUMPConsentForm.Show(Activity, new GoogleUMPConsentFormDismissedListener(
                    (Xamarin.Google.UserMesssagingPlatform.FormError f) =>
                    {
                        if (googleUMPConsentInformation.ConsentStatus == 2) // required
                    {
                            Console.WriteLine("ERROR: MainActivity.DisplayAdvertisingConsentForm: Consent was dismissed; showing it again because consent is still required.");
                            DisplayAdvertisingConsentForm();
                        }
                    }));
        }
        else
        {
            Console.WriteLine("ERROR: MainActivity.DisplayAdvertisingConsentForm: consent form or consent information missing.");
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine("ERROR: MainActivity.DisplayAdvertisingConsentForm: Exception thrown: ", ex);
    }
}

public class GoogleUMPConsentFormDismissedListener : Java.Lang.Object, Xamarin.Google.UserMesssagingPlatform.IConsentFormOnConsentFormDismissedListener
{
    public GoogleUMPConsentFormDismissedListener(Action<Xamarin.Google.UserMesssagingPlatform.FormError> failureAction)
    {
        a = failureAction;
    }
    public void OnConsentFormDismissed(Xamarin.Google.UserMesssagingPlatform.FormError f)
    {
        a(f);
    }

    private Action<Xamarin.Google.UserMesssagingPlatform.FormError> a = null;
}

public class GoogleUMPConsentUpdateFailureListener : Java.Lang.Object, Xamarin.Google.UserMesssagingPlatform.IConsentInformationOnConsentInfoUpdateFailureListener
{
    public GoogleUMPConsentUpdateFailureListener(Action<Xamarin.Google.UserMesssagingPlatform.FormError> failureAction)
    {
        a = failureAction;
    }
    public void OnConsentInfoUpdateFailure(Xamarin.Google.UserMesssagingPlatform.FormError f)
    {
        a(f);
    }

    private Action<Xamarin.Google.UserMesssagingPlatform.FormError> a = null;
}

public class GoogleUMPConsentUpdateSuccessListener : Java.Lang.Object, Xamarin.Google.UserMesssagingPlatform.IConsentInformationOnConsentInfoUpdateSuccessListener
{
    public GoogleUMPConsentUpdateSuccessListener(Action successAction)
    {
        a = successAction;
    }

    public void OnConsentInfoUpdateSuccess()
    {
        a();
    }

    private Action a = null;
}

public class GoogleUMPFormLoadFailureListener : Java.Lang.Object, Xamarin.Google.UserMesssagingPlatform.UserMessagingPlatform.IOnConsentFormLoadFailureListener
{
    public GoogleUMPFormLoadFailureListener(Action<Xamarin.Google.UserMesssagingPlatform.FormError> failureAction)
    {
        a = failureAction;
    }
    public void OnConsentFormLoadFailure(Xamarin.Google.UserMesssagingPlatform.FormError e)
    {
        a(e);
    }

    private Action<Xamarin.Google.UserMesssagingPlatform.FormError> a = null;
}

public class GoogleUMPFormLoadSuccessListener : Java.Lang.Object, Xamarin.Google.UserMesssagingPlatform.UserMessagingPlatform.IOnConsentFormLoadSuccessListener
{
    public GoogleUMPFormLoadSuccessListener(Action<Xamarin.Google.UserMesssagingPlatform.IConsentForm> successAction)
    {
        a = successAction;
    }
    public void OnConsentFormLoadSuccess(Xamarin.Google.UserMesssagingPlatform.IConsentForm f)
    {
        a(f);
    }

    private Action<Xamarin.Google.UserMesssagingPlatform.IConsentForm> a = null;
}
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5) Load the GDPR:

MobileAds.Initialize(this);
SetGDPR();
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And that's all!

preview

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