Initialize a new React Native project using the following command line:
react-native init Friends
Afterwards, navigate to the new project you just created using a command line.
The Facebook SDK for React Native is available through npm in a package called react-native-fbsdk. We'll install it as such:
npm install --save react-native-fbsdk
Now link the SDK, as follows:
react-native link react-native-fbsdk
Now, follow the detailed instructions on the react-native-fbsdk repo on GitHub found at https://github.com/facebook/react-native-fbsdk. Since the installation instructions are prone to being changed at any given time, I highly recommend that you use the instructions found in that repo.