Android Weekly Issue #429

Dark Theme with MDC

Android 10加了系统设置dark mode.

关于Dark theme的design guide:
https://material.io/design/color/dark-theme.html

如何支持dark mode.

改变theme

<style name="Theme.MyApp"
       parent="Theme.MaterialComponents.DayNight">
    <!-- Other theme attributes -->
</style>

选择想要在哪个mode (optional)
因为Android 10之前的设备没有dark mode的系统设置, 所以app可以提供app内的设置, 让用户可以改theme.

这种设置在10+以上的设备上可以让用户覆盖系统设置.

测试

Refactoring from LiveData to Coroutines & Flow

LiveData只和UI层面有关系, 其他层都不应该使用LiveData. 包括Repository, DataSource, 在这些地方应该使用Flow或者RxJava, 让LiveData只在ViewModel中.

本篇文章讲了如何把Repository中的LiveData改成协程Flow.

用到了livedata-ktx, 迁移过程中还用到了@deprecated.

Animating your Keyboard (part 1)

Animating your keyboard (part 2): Reacting to WindowInset animations

键盘动画.

用了Android 11的API, 例子:
https://github.com/android/user-interface-samples/tree/master/WindowInsetsAnimation

Material Motion with MDC

The motion system: https://material.io/design/motion/the-motion-system.html

Port forwarding for Android app development

设备端口转发.

adb的方式:

adb reverse tcp:8085 tcp:8080

Chrome的方式:
https://developers.google.com/web/tools/chrome-devtools/remote-debugging/local-server#port-forwarding

Introducing Constraint Layout 2.0

ConstraintLayout 2.0.

Understanding Jetpack Compose — Part 1 of 2

Under the hood of Jetpack Compose — part 2 of 2

了解Jetpack Compose.

Shrinking a Kotlin binary by 99.2%

这个工具可以看dependency tree的diff: https://github.com/JakeWharton/dependency-tree-diff

We Recommend Material Design Components

建议使用Material Design Components.
本期还有好几篇文章:

Code

https://github.com/airbnb/Showkase 基于注解处理器的Jetpack compose UI分析器.
https://github.com/JakeWharton/diffuse 各种apk, jar, aar, aab包的diff工具.
https://github.com/material-components/material-components-android-compose-theme-adapter 让xml中定义的theming可以在jetpack compose中复用.
https://github.com/JakeWharton/dependency-tree-diff
https://github.com/android/compose-samples

Videos

What's new in Android 11

Android Weekly Notes #429