我应该如何覆盖 VideoView 的 onDraw 以使其具有透明的圆角? [英] How should I override VideoView's onDraw in order for it to have transparent rounded corners?

问题描述

显然在 VideoView 的情况下使用背景形状不起作用此外，有很多文章如何覆盖 ImageView 的 onDraw 并使其角变圆.

但我如何为 VideoView 执行此操作?

解决方案

透明圆角不能使用 VideoView 或任何 SurfaceView 来完成，根据文档:

<块引用>

表面是 Z 序的，因此它位于持有 SurfaceView 的窗口后面；SurfaceView 在其窗口中打孔以显示其表面.

使用 TextureView 这在理论上似乎是可能的，因为它应该表现得像一个普通视图.但是我也做不到:在父 FrameLayout 的前景中尝试了 TextureView 图层绘制和 ShapeDrawable 的 Porter Duff 模式.

使用 VideoView，您可以制作纯色的角.使用带有透明内容的 9-patch 和纯色的角，并设置在绘制在顶部的 ImageView 上.

检查这个 示例项目.

Clearly using a background shape doesnt work in the case of VideoView Also, there are lots of articles how to override onDraw for ImageView and make its corners round.

But how do I do it for a VideoView?

解决方案

Transparent rounded corners cannot be done with a VideoView or any SurfaceView, as according to the documentation:

The surface is Z ordered so that it is behind the window holding its SurfaceView; the SurfaceView punches a hole in its window to allow its surface to be displayed.

With a TextureView it seems theoretically possible, as its supposed to behave like a normal view. However I was unable too: Tried Porter Duff modes of both the TextureView layer paint and a ShapeDrawable in the foreground of the parent FrameLayout.

With a VideoView, what you can do is make corners of a solid color. Use a 9-patch with transparent content and just the corners of a solid color and set in on an ImageView that gets drawn on top.

Edit: Check this example project.

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