不可见的SurfaceView用于相机预览 [英] Invisible SurfaceView for Camera Preview

问题描述

我需要获取相机预览数据，但不可见预览。
因为我在服务中做所有这些，我不得不创建一个虚拟的SurfaceView，它工作得很好。

I need to get camera preview data only, but not visible preview. Since I'm doing all this in a service, I had to create a dummy SurfaceView, which works very well.

我使用的代码此答案：
http://stackoverflow.com/a/10268650/1395697

I've used the code from this answer: http://stackoverflow.com/a/10268650/1395697

但是， TYPE_SYSTEM_OVERLAY 它没有工作。它是不可见的，但没有收到预览数据（在 onPreviewFrame（））。当我将这个参数改为0时，我获得预览数据，但是 SurfaceView 是可见的。

However, with TYPE_SYSTEM_OVERLAY it didn't work. It was invisible but no preview data was received (in onPreviewFrame()). When I change this argument to 0, I get preview data, but the SurfaceView is visible.

任何其他方式来做到这一点？

Do you know any other way to do this?

我现在做的只是使一个可见的 SurfaceView 的宽度和高度1，然后使用特定颜色创建 ImageView 覆盖，以便您不会看到 SurfaceView 。但是这不是很整齐，我真的想做得更好。

What I did now is just make a visible SurfaceView with width and height of 1 and then I create an ImageView overlay with a specific color so that you don't see the change of color of the SurfaceView. But this isn't neat at all and I'd really like to do it a bit better.

推荐答案

同样的stackOverflow答案，并得到相同的problem.so：

i also used the same stackOverflow answer, and get the same problem.so:

我已经添加了这个代码

this.setZOrderOnTop(true);
SurfaceHolder h = this.getHolder();
h.setFormat(PixelFormat.TRANSPARENT);

到我的surfaceChanged方法，而不是活动（或在我的情况下的服务），并得到它trasparent，但日志抱怨放弃的帧：（

to my surfaceChanged method, instead of the activity (or a service at my case), and got it trasparent, but the Log complains on abandoned frames :(

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