Context.js

// App.js

const App = () =>
  <Context.Provider value={this.state.context}>
    <AppBar onPressLogoutButton={this.logout} />
    <View style={{paddingTop: 64}}>
      <Router>
        <Route exact path="/" exact component={Home} />
      </Router>
    </View>
  </Context.Provider>

// Context.js

import React from 'react';
const Context = React.createContext();

const withContext = (Component) => {
  return (props) =>
  <Context.Consumer>
    {context => <Component context={context} {...props} />}
  </Context.Consumer>
}

export default Context;
export {withContext};