Book Image

React Native By Example

By : Richard Kho
Book Image

React Native By Example

By: Richard Kho

Overview of this book

React Native's ability to build performant mobile applications with JavaScript has resulted in its popularity amongst developers. Developers now have the luxury to create incredible mobile experiences that look and feel native to their platforms with the comfort of a well-known language and the popular React.js library. This book will show you how to build your own native mobile applications for the iOS and Android platforms while leveraging the finesse and simplicity of JavaScript and React. Throughout the book you will build three projects, each of increasing complexity. You will also link up with the third-party Facebook SDK, convert an app to support the Redux architecture, and learn the process involved in making your apps available for sale on the iOS App Store and Google Play. At the end of this book, you will have learned and implemented a wide breadth of core APIs and components found in the React Native framework that are necessary in creating great mobile experiences.
Table of Contents (17 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback

DatePickerAndroid and TimePickerAndroid

Setting a time and date on Android is much different from iOS. With iOS, you have a DatePickerIOS component that includes both the date and time. On Android, this is split into two native modals, DatePickerAndroid for the date and TimePickerAndroid for the time. It's not a component to render either, it's an asynchronous function that opens the modal and waits for a natural conclusion before applying logic to it.

To open one of these, wrap an asynchronous function around it:

async renderDatePicker () { 
  const { action, year, month, day } = await{ 
    date: new Date() 

  if (action === DatePickerAndroid.dismissedAction) { 

  // do something with the year, month, and day here 

Both the DatePickerAndroid and TimePickerAndroid components return an object, and we can grab the properties of each object by using ES6 destructuring assignment, as shown in the preceding snippet.

As these components will render...