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140 lines
5.8 KiB
Markdown
140 lines
5.8 KiB
Markdown
# Contributing code to Matrix
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Please read https://github.com/matrix-org/synapse/blob/master/CONTRIBUTING.md
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Android support can be found in this [](https://matrix.to/#/#element-android:matrix.org) room.
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# Specific rules for Matrix Android projects
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## Android Studio settings
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Please set the "hard wrap" setting of Android Studio to 160 chars, this is the setting we use internally to format the source code (Menu `Settings/Editor/Code Style` then `Hard wrap at`).
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Please ensure that your using the project formatting rules (which are in the project at .idea/codeStyles/), and format the file before committing them.
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### Template
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An Android Studio template has been added to the project to help creating all files needed when adding a new screen to the application. Fragment, ViewModel, Activity, etc.
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To install the template (to be done only once):
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- Go to folder `./tools/template`.
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- Mac OSX: Run the script `./configure.sh`.
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Linux: Run `ANDROID_STUDIO=/path/to/android-studio ./configure`
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- e.g. `ANDROID_STUDIO=/usr/local/android-studio ./configure`
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- Restart Android Studio.
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To create a new screen:
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- First create a new package in your code.
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- Then right click on the package, and select `New/New Vector/Element Feature`.
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- Follow the Wizard, especially replace `Main` by something more relevant to your feature.
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- Click on `Finish`.
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- Remaining steps are described as TODO in the generated files, or will be pointed out by the compiler, or at runtime :)
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Note that if the templates are modified, the only things to do is to restart Android Studio for the change to take effect.
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## Compilation
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For now, the Matrix SDK and the Element application are in the same project. So there is no specific thing to do, this project should compile without any special action.
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## I want to help translating Element
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If you want to fix an issue with an English string, please submit a PR.
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If you want to fix an issue in other languages, or add a missing translation, or even add a new language, please use [Weblate](https://translate.element.io/projects/element-android/).
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## I want to submit a PR to fix an issue
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Please check if a corresponding issue exists. If yes, please let us know in a comment that you're working on it.
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If an issue does not exist yet, it may be relevant to open a new issue and let us know that you're implementing it.
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### Kotlin
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This project is full Kotlin. Please do not write Java classes.
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### Changelog
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Please create at least one file under ./changelog.d containing details about your change. Towncrier will be used when preparing the release.
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Towncrier says to use the PR number for the filename, but the issue number is also fine.
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Supported filename extensions are:
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- ``.feature``: Signifying a new feature in Element Android or in the Matrix SDK.
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- ``.bugfix``: Signifying a bug fix.
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- ``.doc``: Signifying a documentation improvement.
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- ``.removal``: Signifying a deprecation or removal of public API. Can be used to notifying about API change in the Matrix SDK
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- ``.misc``: Any other changes.
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See https://github.com/twisted/towncrier#news-fragments if you need more details.
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### Code quality
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Make sure the following commands execute without any error:
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#### Internal tool
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<pre>
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./tools/check/check_code_quality.sh
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</pre>
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#### ktlint
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<pre>
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curl -sSLO https://github.com/pinterest/ktlint/releases/download/0.34.2/ktlint && chmod a+x ktlint
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./ktlint --android --experimental -v
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</pre>
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Note that you can run
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<pre>
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./ktlint --android --experimental -v -F
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</pre>
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For ktlint to fix some detected errors for you (you still have to check and commit the fix of course)
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#### lint
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<pre>
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./gradlew lintGplayRelease
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./gradlew lintFdroidRelease
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</pre>
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### Unit tests
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Make sure the following commands execute without any error:
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<pre>
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./gradlew testGplayReleaseUnitTest
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</pre>
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### Tests
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Element is currently supported on Android Lollipop (API 21+): please test your change on an Android device (or Android emulator) running with API 21. Many issues can happen (including crashes) on older devices.
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Also, if possible, please test your change on a real device. Testing on Android emulator may not be sufficient.
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You should consider adding Unit tests with your PR, and also integration tests (AndroidTest). Please refer to [this document](./docs/integration_tests.md) to install and run the integration test environment.
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### Internationalisation
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When adding new string resources, please only add new entries in file `value/strings.xml`. Translations will be added later by the community of translators with a specific tool named [Weblate](https://translate.riot.im/projects/riot-android/).
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Do not hesitate to use plurals when appropriate.
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### Accessibility
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Please consider accessibility as an important point. As a minimum requirement, in layout XML files please use attributes such as `android:contentDescription` and `android:importantForAccessibility`, and test with a screen reader if it's working well. You can add new string resources, dedicated to accessibility, in this case, please prefix theirs id with `a11y_`.
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### Layout
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When adding or editing layouts, make sure the layout will render correctly if device uses a RTL (Right To Left) language.
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You can check this in the layout editor preview by selecting any RTL language (ex: Arabic).
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Also please check that the colors are ok for all the current themes of Element. Please use `?attr` instead of `@color` to reference colors in the layout. You can check this in the layout editor preview by selecting all the main themes (`AppTheme.Status`, `AppTheme.Dark`, etc.).
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### Authors
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Feel free to add an entry in file AUTHORS.md
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## Thanks
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Thanks for contributing to Matrix projects!
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