android - Xamarin 中的 LayoutInDisplayCutoutMode 问题

Question

我在 Xamarin.Android 中为剪切模式设置属性时遇到了一个奇怪的问题。我想在我的应用程序中添加对剪切模式的支持，因此我更新了项目以使用 SDK 9.0，并将这一行添加到我的 Activity 中:

Window.Attributes.LayoutInDisplayCutoutMode = LayoutInDisplayCutoutMode.ShortEdges;

我的项目编译但是当它运行时我在上面的行中得到这个异常:

Java.Lang.NoSuchFieldError: no "I" field "layoutInDisplayCutoutMode" in class "Landroid/view/WindowManager$LayoutParams;" or its superclasses

我的项目设置是:

Compile using Android version: Android 9.0 (Pie)

Minimum Android version: Android 4.3 (API Level 18)

Target Android version: Android 9.0 (API Level 28)

所有最新的 nuget 库。

Answer 1

LayoutInDisplayCutoutMode 已添加到 API 级别 28 (Pie)。

通过"new"AndroidX“Compat”库为剪切模式 (androidx.core.view.DisplayCutoutCompat) 提供旧设备 API 支持，但 Microsoft/Xamarin 仍然尚未公布对他们的公开支持。

围绕此功能差距存在许多基于 github 的问题(对于新的 AndroidX 的 WorkManager 和其他我必须创建自己的绑定(bind)...)

• > https://github.com/xamarin/AndroidSupportComponents/issues

现在您可以执行 API 级别检查，

if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.P)
{
    Window.Attributes.LayoutInDisplayCutoutMode = LayoutInDisplayCutoutMode.ShortEdges;
}

• > https://android-developers.googleblog.com/2018/07/supporting-display-cutouts-on-edge-to.html

In Android P we added APIs to let you manage how your app uses the display cutout area, as well as to check for the presence of cutouts and get their positions.

For devices running Android 8.1 (API 27), we've also back-ported the layoutInDisplayCutoutMode activity theme attribute so you can control the display of your content in the cutout area. Note that support on devices running Android 8.1 or lower is up to the device manufacturer, however.

To make it easier to manage your cutout implementation across API levels, we've also added DisplayCutoutCompat in the AndroidX library, which is now available through the SDK manager.