如何旋转textureView显示相机preVIEW [英] how to rotate textureView to show a cameraPreview

问题描述

我用摄像机2 API来显示相机preVIEW，我锁定lanscape屏幕的方向，我的问题是，我想旋转textureview以显示正确的相机preVIEW，当我旋转使用该方法setRotation，它变得更小。我搜索堆栈，但所有的解决方案都相对于摄像头（第一个API），所以有旋转textureView的解决方案。

I use the camera2 api to show a camerapreview, and i lock the screen orientation on lanscape, my problem is that i want to rotate the textureview to display the correct camerapreview, when i rotate it using the method setRotation, it becomes smaller. I search on stack but all solutions are relative to camera(first api) so is there a solution to rotate the textureView.

推荐答案

您可以添加一个旋转到TextureView的矩阵。举一个例子，请参见 Grafika的玩电影活动，它发送一个视频去$ C $的输出CR到TextureView（相同的基本原则，相机preVIEW）。

You can add a rotation to the TextureView's matrix. For an example, see Grafika's "play movie activity", which sends the output of a video decoder to a TextureView (same basic principles as Camera preview).

如果你看一下<一个href=\"https://github.com/google/grafika/blob/master/src/com/android/grafika/PlayMovieActivity.java#L211\"相对=nofollow> adjustAspectRatio（） 你可以看到它调节输出的位置（翻译）和规模相匹配的视频的显示比例。还有一个注释掉 postRotate（）通话将旋转输出10度。

If you look at adjustAspectRatio() you can see it adjusting the position (translation) and scale of the output to match the video's aspect ratio. There's also a commented out postRotate() call that would rotate the output 10 degrees.

请注意这是旋转视图中的视频帧，而不是视图本身。

Note this is rotating the video frame within the View, not the View itself.

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