我只需要拿到相机preVIEW数据，但不可见preVIEW。 因为我做的这一切都在一个服务，我不得不创建一个虚拟SurfaceView，这工作得很好。

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.

我用这个答案code： http://stackoverflow.com/a/10268650/1395697

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

然而，随着TYPE_SYSTEM_OVERLAY没有奏效。它是无形的，但没有收到preVIEW数据（在previewFrame（））。当我这个参数更改为0，我得到preVIEW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.

你知不知道任何其他方式做到这一点？

Do you know any other way to do this?

我所做的现在只是做一个明显的SurfaceView一个宽度为1和高度，然后创建一个ImageView的覆盖与特定的颜色，这样你就不会看到SurfaceView的颜色变化。但是，这是不是整齐的一切，我真的很想做一个好一点......

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

我也用同样的计算器的答案，并获得相同的problem.so：

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

我添加了这code

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

我surfaceChanged的方法，而不是活动（或在我的情况下，服务），并把它trasparent，但日志上抱怨被遗弃的框架：（

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 :(