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How to use OpenIAB Unity Plugin with Google Play
The purpose of this page is to guide you through setting in-app purchases on Google Play store, with Unity and the OpenIAB plugin.
We'll use the OpenIAB demo and modify code for a real product use.
You need to have a version of Unity (the free version is OK), the Android SDK up-to-date, a Java JDK correctly installed on your computer ("visible" by Unity), and an Android Device for testing. For instance, the following set up works with these instructions : Unity 4.5.2, Java 1.7.0_65 64 bits on Windows 7, with a Google Nexus 7 on Android 4.4.4.
You'll also need a Google Developer account, with a bank account verified (Google Wallet > Payment settings). Besides that, to have a second Gmail account is more convenient for testing puposes. For instance, on the Nexus 7, you can create an additionnal user account with a different Gmail address for that.
You're supposed to be familiar with the Google Play Developer Console (GPDC) uploads, and the terms of in-app billing, by reading Official Google Play In-app Billing. You don't need to run all the Java code (OpenIAB-Unity-Plugin is a convenient C# wrapper of these Java functionalities) but at least to be aware of definition of SKU, License Key, in-app product prices, etc. .
Run a new Unity Project, you can also use an existing project but maybe it's safer to start from blank to understand the mechanics first. Grap the lastest version for Unity here : OpenIAB - Open In-App Billing Open the scene OpenIAB-demo (Assets > OpenIAB-demo).
In the GPDC, create a new application (All applications > Add new application). Grap the License Key, to put it in your code (> Services & APIs). It's a string like "MIIBIjANBgkqhkiG9w0BA...(lots of characters)...QOX90E1rQIDAQAB" without a space.
Manifest
`...
<!-- IMPORTANT !!!!!!!!!!!!!!!!!!!!!!!!! -->
<uses-feature android:name="android.hardware.telephony" android:required="false" />
<permission android:name="com.tmoney.vending.INBILLING"/>
`
Keystore & password
devices supported
declare the product and price
wait and test