SSIMPIZE

   When registering as a developer on the Google Play console, you have to pay by card in the payment window, but the payment error still occurred even though the credit card number that is being used well both domestically and abroad was correctly entered.   The error message at that time was "The request has failed. Use a different payment method or contact your bank. Learn more [OR-CCSEH-22]".    The same error continued to occur even with other PCs and tablets, and even searching the Internet could not find a solution.     In the end, it was resolved immediately by paying with a different credit card.    There is no solution with an erroneous credit card. Credit card in the name of another person is also irrelevant, so pay with another card.

 When registering an app in Google AdMob, the following must be set. 1. Add app   Add an app registered in the Play Store 2. Register the developer site of the registered appAdd app   Register the app's website on the play console 3. Register APP-ADS.TXT on the website   The app should be visible in the APP-ADS.TXT tab   If you do not see the app connected to the APP-ADS.TXT tab of the AdMob site even after doing this, try the following. MobileAds.Initialize   How to attach AdMob ads to Xamarin.Forms apps is well known on the Internet, but most of them are wrong.   It is said to be put in Oncreate of MainActivity.cs as follows.          protected override void OnCreate(Bundle savedInstanceState)         {             TabLayoutResource = Resource.Layout.Tabbar;             ToolbarResource = Resource.Layout.Toolbar;   ...

   After developing an app with Xamarin.Forms for a long time, I registered AdMob as well, and when I tested it on a test device, advertisements were sometimes displayed. However, it seems that there were more times when the advertisement was not shown.   Even though I launched the app on the Play Store, I still didn't see any ads, so I searched the internet for a number of reasons.   In conclusion, the test advertisement should appear straight on the device registered as a test device with AdMob.   I went through two methods, but the first would be the direct cause, and the second could not be said to have no effect. Grid height fixed   I set the height of the ad area to Auto on the page where the ad is displayed (the third row in the source below), but there were quite a few people that this did not work properly in AdMob ads.        <Grid.RowDefinitions>             <RowDefinition Height="Au...

  Start a shared project by developing a simple program.