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app Change the Android activity launch mode to singleTop (#3792)
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README.md Use the flutter.jar in the artifact cache by default (#3278)
build.gradle Upgrade gradle files for Android Studio 2.1
settings.gradle Example that builds a Flutter Android app using Gradle
README.md

Example of building a Flutter app for Android using Gradle

This project demonstrates how to embed Flutter within an Android application and build the Android and Flutter components with Gradle.

To build this project:

  • Create a local.properties file with these entries:
    • sdk.dir=[path to the Android SDK]
    • flutter.sdk=[path to the Flutter SDK]

Then run:

  • gradle wrapper
  • ./gradlew build

Updating the Dart code

You can push new Dart code to a Flutter app during development without performing a full rebuild of the Android app package.

The flutter refresh tool manages this process. flutter refresh will build a snapshot of an app's Dart code, copy it to an Android device, and send an intent instructing the Android app to load the snapshot.

To try this out:

  • Install and run this app on your device
  • Edit the Dart code in app/src/flutter/lib
  • cd app/src/flutter
  • flutter refresh --activity com.example.flutter/.ExampleActivity

flutter refresh sends an ACTION_RUN intent with an extra containing the device filesystem path where the snapshot was copied. ExampleActivity.java shows how an activity can handle this intent and load the new snapshot into a Flutter view.

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