October 2019
Beginner
528 pages
12h 37m
English
Content preview from Beginning Flutter
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12Writing Platform‐Native Code
WHAT YOU WILL LEARN IN THIS CHAPTER
- How to use platform channels to send and receive messages from the Flutter app to iOS and Android to access specific API functionality
- How to write native platform code in iOS Swift and Android Kotlin to access device information
- How to use
MethodChannelto send messages from the Flutter app (on the client side) - How to use
FlutterMethodChannelon iOS andMethodChannelon Android to receive calls and send back results (on the host side)
Platform channels give you the ability to use native features such as accessing the device information, GPS location, local notifications, local file system, sharing, and many more. In the “External Packages” section of Chapter 2, “Creating a Hello World App,” you learned how to use third‐party packages to add functionality to your apps. In this chapter, instead of relying on third‐party packages, you'll learn how to add custom functionality to your apps by using platform channels and writing the API code yourself. You'll build an app that asks the iOS and Android platforms to return the device information.
UNDERSTANDING PLATFORM CHANNELS
When you need to access platform‐specific APIs for iOS and Android, you use platform channels to send and receive messages. The Flutter app is the client, and the platform‐native code for iOS and Android is the host. If needed, it is also possible to have the platform‐native code to act as a client to call methods written in the Flutter app ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.