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

问题描述

我只需要获取相机预览数据，而不是可见预览.由于我在服务中完成所有这些操作，因此我必须创建一个虚拟的 SurfaceView，它的效果非常好.

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.

我使用了这个答案中的代码:https://stackoverflow.com/a/10268650/1395697

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

但是，使用 TYPE_SYSTEM_OVERLAY 它不起作用.它是不可见的，但没有收到预览数据(在 onPreviewFrame() 中).当我将此参数更改为 0 时，我会获得预览数据，但 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.

你知道其他方法吗?

我现在所做的只是制作一个可见的 SurfaceView，宽度和高度为 1，然后我创建一个具有特定颜色的 ImageView 叠加层，这样您就不会查看 SurfaceView 的颜色变化.但这一点都不整洁，我真的很想做得更好.

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

我也用了同样的stackOverflow答案，得到同样的问题.所以:

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

我已添加此代码

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

到我的 surfaceChanged 方法，而不是活动(或我的情况下的服务)，并让它变得透明，但日志抱怨废弃的帧:(

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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