Android Weekly Issue #460

Common Design Patterns and App Architectures for Android

• 一些设计模式在Android中的应用.
• Android的几个patterns. MVC, MVVM, Clean Architecture.

Avoid launchIn

这段代码:

    events.filterIsInstance<CloseClicked>()
      .onEach { navigator.goTo(Finish()) }
      .launchIn(coroutineScope)

可以替换成:

    coroutineScope.launch {
      events.first { it is CloseClicked }
      navigator.goTo(Finish())
    }

或者:

    coroutineScope.launch {
      events.filterIsInstance<CloseClicked>()
        .collect { navigator.goTo(Finish()) }
    }

Modular Navigation with Jetpack Compose

Compose的理想世界应该是摆脱了Fragment的.

官方提供的Compose Navigation有一些缺点比如:

• 需要依赖navHostController.
• 不好测试.

作者受到这篇文章的启发, 准备探索一下多个modules项目中, compose导航的解决方案.

作者做了一个例子来探索这个方案: https://github.com/hitherejoe/minimise

强烈推荐这篇文章!!

Implementing Snackbar to undo actions in Jetpack Compose

Compose的snackbar + undo.

Scoped recomposition in Jetpack Compose

关于Jetpack Compose的一个小探讨.

结论: 看官方的建议: https://developer.android.com/jetpack/compose/state
不要担心太多.

Using Compose Beta on AS 4.1

不升级IDE也能用上Compose的方法.

ki: The Next Interactive Shell for Kotlin

https://github.com/Kotlin/kotlin-interactive-shell

Libraries & Code

• https://github.com/patilsiddhesh/Holi 颜色库
• https://github.com/cbeust/kash kotlin写的shell.
• https://github.com/cashapp/InflationInject Constructor-inject views during XML layout inflation