• WindowMetricsCalculator

  https:\/\/developer.android.google.cn/reference/kotlin/androidx/window/layout/WindowMetricsCalculator

在此基础上，窗口大小类别是一组视口划分点，有助于您设计、开发和测试响应式和自适应应用布局。此类划分点专门用于平衡布局的简单性和灵活性，以便针对特殊情况优化您的应用。

• 窗口大小类别

  https:\/\/developer.android.google.cn/guide/topics/large-screens/support-different-screen-sizes#window_size_classes

对于基于 View 的应用，您可以使用以下代码段来计算窗口大小类别: 

private fun computeWindowSizeClasses() {
        val metrics = WindowMetricsCalculator.getOrCreate()
            .computeCurrentWindowMetrics(this)
        val width = metrics.bounds.width()
        val height = metrics.bounds.height()
        val density = resources.displayMetrics.density
        val windowSizeClass = WindowSizeClass.compute(width/density, height/density)

        // use windowSizeClass.windowHeightSizeClass and windowSizeClass.windowWidthSizeClass
}

您可以参阅 "支持不同屏幕尺寸" 开发者指南了解详细信息。

• 支持不同屏幕尺寸

  https:\/\/developer.android.google.cn/guide/topics/large-screens/support-different-screen-sizes

• 状态: 设备的折叠状态: FLAT 或 HALF_OPENED

• 方向: 折叠或设备合页的方向: HORIZONTAL 或 VERTICAL
• 遮挡类型: 折叠或合页是否遮挡部分显示屏: NONE 或 FULL
• 是否分离: 折叠或合页是否创建了两个逻辑显示区域: true 或 false
• 边界: 应用窗口内功能的边界矩形 (继承自 DisplayFeature)

• WindowInfoTracker
  https:\/\/developer.android.google.cn/reference/kotlin/androidx/window/layout/WindowInfoTracker
• FoldingFeature
  https:\/\/developer.android.google.cn/reference/androidx/window/layout/FoldingFeature
• DisplayFeature
  https:\/\/developer.android.google.cn/reference/androidx/window/layout/DisplayFeature#getBounds%28%29

您可以通过 Flow 访问这些数据: 

override fun onCreate(savedInstanceState: Bundle?) {
    ...
    lifecycleScope.launch(Dispatchers.Main) {
        lifecycle.repeatOnLifecycle(Lifecycle.State.STARTED) {
            WindowInfoTracker.getOrCreate(this@MainActivity)
                .windowLayoutInfo(this@MainActivity)
                .collect { layoutInfo ->
                    // New posture information
                    val foldingFeature = layoutInfo.displayFeatures
                    // use the folding feature to update the layout
                }
        }
    }
}

• Flow

  https:\/\/kotlinlang.org/api/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.flow/-flow/

• MediaPlayerActivity.kt

  https:\/\/github.com/android/platform-samples/blob/main/samples/user-interface/windowmanager/src/main/java/com/example/platform/ui/windowmanager/MediaPlayerActivity.kt

• Activity 嵌入

  https:\/\/developer.android.google.cn/reference/kotlin/androidx/window/embedding/package-summary

• SlidingPaneLayout

  https:\/\/developer.android.google.cn/jetpack/androidx/releases/slidingpanelayout

• 修改分屏行为 (分屏比例、规则、结束行为)

• 定义占位符
• 在运行时环境中检查 (并更改) 分屏状态
• 实现水平分屏
• 在全窗口中启动模态

https:\/\/developer.android.google.cn/codelabs/large-screens/activity-embedding

• Activity 嵌入

  https:\/\/developer.android.google.cn/guide/topics/large-screens/activity-embedding#cross-application

• 1.2 版本

  https:\/\/developer.android.google.cn/jetpack/androidx/releases/window#version_12_2

• 文档

  https:\/\/developer.android.google.cn/jetpack/androidx/releases/window

• 示例应用

  https:\/\/github.com/android/platform-samples/tree/main/samples/user-interface/windowmanager