App-lifecycle.js

componentDidMount() {
    // turning on the device camera when we load the app (it'll stay on in the background)
    this.props.bebo.Camera.previewOn();
    // we'll use our wrapped Bebo SDK to get the acting user and set it to the app's state
    this.props.bebo.User.getUser('me', (err, user) => {
      if (!err) {
        this.setState({ actingUser: user });
      }
    });
    // we'll get the initial 50 photos
    this.getPhotosFromDB();
  }

  componentWillUnmount() {
    // when we're leaving the app, we'll turn the device camera off
    this.props.bebo.Camera.previewOff();
  }