$ yarn add aws-amplify
$ yarn add aws-amplify-react-native
$ react-native link

import Amplify from 'aws-amplify';
import amplify from './aws-exports';

Amplify.configure(amplify);

$ amplify add auth
$ amplify push

import { withAuthenticator } from 'aws-amplify-react-native';

export default withAuthenticator(App);

$ amplify add api
-> Please select from one of the below mentioned services 
  GraphQL 
❯ REST 

➜  myAmplifyProject git:(master) ✗ amplify add api
-> Please select from one of the below mentioned services REST
-> Provide a friendly name for your resource to be used as a label for this category in the project: testProject
-> Provide a path (e.g., /items) /items
-> Choose a Lambda source Create a new Lambda function
-> Provide a friendly name for your resource to be used as a label for this category in the project: listFunctionTest
-> Provide the AWS Lambda function name: listFunctionTest
                   
                   
-> Choose the function template that you want to use: Serverless express function (Integration with Amazon API Gateway)
-> Do you want to access other resources created in this project from your Lambda function? No
-> Do you want to edit the local lambda function now? Yes
Please edit the file in your editor: ~/project/src/index.js
-> Press enter to continue 
Succesfully added the Lambda function locally
-> Restrict API access Yes
-> Who should have access? Authenticated users only
-> What kind of access do you want for Authenticated users? (Press <space> to select, <a> to toggle all, <i> to invert selection)
-> Do you want to add another path? No

Successfully added resource locally

const awsServerlessExpress = require('aws-serverless-express');
const app = require('./app');

app.get('/items', function(req, res) {
  res.json(req.apiGateway.event);
});

const server = awsServerlessExpress.createServer(app);

exports.handler = (event, context) => {
  console.log(`EVENT: ${JSON.stringify(event)}`);
  awsServerlessExpress.proxy(server, event, context);
};

$ amplify push

// ...
import Amplify, { API } from 'aws-amplify';
Amplify.configure(amplify);

class App extends Component {
  state = { apiResponse: null };

  async getSample() {
  const path = "/items";
    const apiResponse = await API.get("theListApi" , path)
    console.log('response:' + apiResponse);
    this.setState({ apiResponse });
  }

  render() {
    return (
      <View>
        <Button title="Send Request" onPress={this.getSample.bind(this)} />
        <Text>Response: {this.state.apiResponse && JSON.stringify(this.state.apiResponse)}</Text>
      </View>
    );
  }
}

export default withAuthenticator(App);

$ amplify mock

$ amplify add analytics
$ amplify push

import { Analytics } from 'aws-amplify';


...

componentDidMount() {
   Analytics.record('FIRST-EVENT-NAME');
}

import { Analytics, AWSKinesisProvider } from 'aws-amplify';

Analytics.addPluggable(new AWSKinesisProvider());

Analytics.record({
    data: { 
        // The data blob to put into the record
    },
    partitionKey: 'myPartitionKey', 
    streamName: 'myKinesisStream'
}, 'AWSKinesis');