Android的，正面和背面摄像头方向，景观 [英] Android, front and back camera Orientation , Landscape

问题描述

在我的相机应用程序，你可以在正面和背面摄像头之间切换。 当我把照片与相机背面的图片是一样的，如preVIEW节目。 但是，当我切换到前置摄像头，画面mirrorrd.I认为这事做的正面和背面的摄像头为横向模式。 我曾尝试在所以几乎每一个给定的答案。

In my camera app, you can switch between the front and back camera. When I take picture with the back camera the picture is the same like the preview shows. But when I switch to the front camera, the picture is mirrorrd.I think it has something to do that front and back camera is in landscape mode. I have tried almost every given answers on SO.

这将真正帮助，如果有人可以点我在正确的方向。

It would really help if someone could point me in the right directions.

推荐答案

我找到了答案，做 mCamera.setDisplayOrientationa（INT度）; 并没有帮助。我不得不镜像生成的位图，以获得我想要的结果。我用的阵法为实现这一目标。

I found the answer , doing mCamera.setDisplayOrientationa(int degrees); did not help. I had to mirror the generated bitmap in order to get the result I wanted. I used the Matrix method to a achieve this .

float[] mirrorY = { -1, 0, 0, 0, 1, 0, 0, 0, 1};
Matrix matrix = new Matrix();
Matrix matrixMirrorY = new Matrix();
matrixMirrorY.setValues(mirrorY);

matrix.postConcat(matrixMirrorY);

image = Bitmap.createBitmap(mBitmap, 0, 0, frame.getWidth(), frame.getHeight(), matrix, true)

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