Warning: The Sunflower repository is no longer under maintenance, We are prioritizing https://github.com/android/compose-samples as the up-to-date source of truth for Compose best practises. Please use that repository and sample set to continue learning about Jetpack Compose. If you'd like to continue using Sunflower, we encourage you to maintain your own fork of the sample.
A gardening app illustrating Android development best practices with migrating a View-based app to Jetpack Compose. To learn about how Sunflower was migrated to Compose, see the migration journey document.
Note
To see the original View implementation of Sunflower, checkout the views branch.
This sample showcases how to migrate an existing View-based app (Material 2) to Compose (Material 3). See the linked migration journey doc above to learn more.
Note
As Compose cannot render HTML code in Text yet. The
AndroidViewBinding API is used to embed a TextView in Compose. See the
PlantDescription composable in the
PlantDetailView file.
Sunflower uses the Unsplash API to load pictures on the gallery screen. To use the API, you will need to obtain a free developer API key. See the Unsplash API Documentation for instructions.
Once you have the key, add this line to the gradle.properties file, either in your user home
directory (usually ~/.gradle/gradle.properties on Linux and Mac) or in the project's root folder:
unsplash_access_key=<your Unsplash access key>
The app is still usable without an API key, though you won't be able to navigate to the gallery screen.
For development, the latest version of Android Studio is required. The latest version can be downloaded from here.
Sunflower uses ktlint to enforce Kotlin coding styles. Here's how to configure it for use with Android Studio (instructions adapted from the ktlint README):
-
Close Android Studio if it's open
-
Download ktlint using these installation instructions
-
Apply ktlint settings to Android Studio using these instructions
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Start Android Studio
Check out these Wiki pages to learn more about Android Sunflower:
Previously, this sample app was focused on demonstrating best practices for multiple Jetpack libraries. However, this is no longer the case and development will instead be focused on how to adopt Compose in an existing View-based app. So, there are no plans to implement features outside of this scope. Keep this in mind when making contributions to this library.
If you've found an error in this sample, please file an issue: https://github.com/android/sunflower/issues
Patches are encouraged, and may be submitted by forking this project and submitting a pull request through GitHub.
Select text used for describing the plants (in plants.json) are used from Wikipedia via CC BY-SA 3.0 US (license in ASSETS_LICENSE).