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Other resources
For further information on state restoration,
check out the following resources:To learn more about short term and long term state,
check out Differentiate between ephemeral state
and app state.You might want to check out packages on pub.dev that
perform state restoration, such as statePersistence.
<topic_end>
<topic_start>Targeting ChromeOS with Android
This page discusses considerations unique to building
Android apps that support ChromeOS with Flutter.<topic_end>
<topic_start>
Flutter & ChromeOS tips & tricks
For the current versions of ChromeOS, only certain ports from
Linux are exposed to the rest of the environment.
Here’s an example of how to launch
Flutter DevTools for an Android app with ports
that will work:Then, navigate to http://127.0.0.1:8000/#
in your Chrome browser and enter the URL to your
application. The last flutter run command you
just ran should output a URL similar to the format
of http://127.0.0.1:8080/auth_code=/. Use this URL
and select “Connect” to start the Flutter DevTools
for your Android app.<topic_end>
<topic_start>Flutter ChromeOS lint analysis
Flutter has ChromeOS-specific lint analysis checks
to make sure that the app that you’re building
works well on ChromeOS. It looks for things
like required hardware in your Android Manifest
that aren’t available on ChromeOS devices,
permissions that imply requests for unsupported
hardware, as well as other properties or code
that would bring a lesser experience on these devices.To activate these,
you need to create a new analysis_options.yaml
file in your project folder to include these options.
(If you have an existing analysis_options.yaml file,
you can update it)To run these from the command line, use the following command:Sample output for this command might look like:
<topic_end>
<topic_start>iOS
<topic_end>
<topic_start>
Topics
<topic_end>
<topic_start>Add iOS devtools for Flutter
To choose the guide to add iOS devtools to your Flutter configuration,
click the Getting Started path you followed.
<topic_end>
<topic_start>Leveraging Apple's System APIs and Frameworks
When you come from iOS development, you might need to find
Flutter plugins that offer the same abilities as Apple’s system
libraries. This might include accessing device hardware or interacting
with specific frameworks like HealthKit or MapKit.For an overview of how the SwiftUI framework compares to Flutter,
see Flutter for SwiftUI developers.<topic_end>
<topic_start>
Introducing Flutter plugins
Dart calls libraries that contain platform-specific code plugins.
When developing an app with Flutter, you use plugins to interact
with system libraries.In your Dart code, you use the plugin’s Dart API to call the native
code from the system library being used. This means that you can write
the code to call the Dart API. The API then makes it work for all
platforms that the plugin supports.To learn more about plugins, see Using packages.
Though this page links to some popular plugins,
you can find thousands more, along with examples,
on pub.dev. The following table does not endorse any particular plugin.
If you can’t find a package that meets your need,
you can create your own or use platform channels directly in your project.
To learn more, see Writing platform-specific code.<topic_end>
<topic_start>
Adding a plugin to your project
To use an Apple framework within your native project,
import it into your Swift or Objective-C file.To add a Flutter plugin, run flutter pub add package_name
from the root of your project.
This adds the dependency to your pubspec.yaml file.
After you add the dependency, add an import statement for the package
in your Dart file.You might need to change app settings or initialization logic.
If that’s needed, the package’s “Readme” page on pub.dev
should provide details.<topic_end>
<topic_start>
Flutter Plugins and Apple Frameworks
Supports both Google Play Store on Android and Apple App Store on iOS. ↩Adds Google Pay payments on Android and Apple Pay payments on iOS. ↩Uses Firebase Cloud Messaging
and integrates with APNs. ↩Includes sensors like accelerometer, gyroscope, etc. ↩Uses Google’s ML Kit and supports various features like text recognition, face detection, image labeling,
landmark recognition, and barcode scanning. You can also create a custom model with Firebase. To learn more, see Use a custom TensorFlow Lite model with Flutter. ↩ ↩2Uses the OpenWeatherMap API.
Other packages exist that can pull from different weather APIs. ↩
<topic_end>
<topic_start>Adding a launch screen to your iOS app
Launch screens provide a simple initial experience while your iOS app loads.
They set the stage for your application, while allowing time for the app engine
to load and your app to initialize.All apps submitted to the Apple App Store
must provide a launch screen
with an Xcode storyboard.<topic_end>
<topic_start>Customize the launch screen
The default Flutter template includes an Xcode
storyboard named LaunchScreen.storyboard
that can be customized your own assets.
By default, the storyboard displays a blank image,
but you can change this. To do so,
open the Flutter app’s Xcode project
by typing open ios/Runner.xcworkspace
from the root of your app directory.
Then select Runner/Assets.xcassets
from the Project Navigator and