3 Adding Billing Permission to the Manifest File.2 Creating the Example In-app Billing Project.1 Installing the Google Play Billing Library.The purpose of this chapter is to work through a tutorial that demonstrates the steps involved in implementing basic Google Play based in-app billing within an Android application. Google provides support for the integration of in app purchasing through the Google Play In-App Billing API. This typically takes the form of access to a higher level in a game, acquiring virtual goods or currency, or subscribing to the digital edition of a magazine or newspaper. Perhaps the most common and lucrative option is now to charge the user for purchasing items from within the application after it has been installed. Another revenue opportunity was soon introduced in the form of embedding advertising within applications. In the early days of mobile applications for operating systems such as Android and iOS, the most common method for earning revenue was to charge an upfront fee to download and install the application. Previous Table of Contents Next Generating a Signed Release APK File in Android Studio An Overview of Gradle in Android Studio

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