我想根据Android中的设备方向设置相机方向，但似乎没有工作。我试图旋转Surface以及相机参数，但在纵向模式下的相机预览总是颠倒。我需要顺时针旋转90度才能正确。这里是我现在使用的代码只在横向模式下工作的代码。

SurfaceHolder.Callback surfaceCallback = new SurfaceHolder.Callback() {

@Override

public void surfaceDestroyed(SurfaceHolder holder) {

camera.stopPreview();

camera.release();

camera = null;

}

@Override

public void surfaceCreated(SurfaceHolder holder) {

initCamera();

}

private Size getOptimalPreviewSize(List sizes, int w, int h) {

final double ASPECT_TOLERANCE = 0.2;

double targetRatio = (double) w / h;

if (sizes == null)

return null;

Size optimalSize = null;

double minDiff = Double.MAX_VALUE;

int targetHeight = h;

// Try to find an size match aspect ratio and size

for (Size size : sizes) {

Log.d(TAG, "Checking size " + size.width + "w " + size.height

+ "h");

double ratio = (double) size.width / size.height;

if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE)

continue;

if (Math.abs(size.height - targetHeight) < minDiff) {

optimalSize = size;

minDiff = Math.abs(size.height - targetHeight);

}

}

// Cannot find the one match the aspect ratio, ignore the

// requirement

if (optimalSize == null) {

minDiff = Double.MAX_VALUE;

for (Size size : sizes) {

if (Math.abs(size.height - targetHeight) < minDiff) {

optimalSize = size;

minDiff = Math.abs(size.height - targetHeight);

}

}

}

return optimalSize;

}

@Override

public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

Camera.Parameters parameters = camera.getParameters();

List sizes = parameters.getSupportedPreviewSizes();

Size optimalSize = getOptimalPreviewSize(sizes, width, height);

Log.d(TAG, "Surface size is " + width + "w " + height + "h");

Log.d(TAG, "Optimal size is " + optimalSize.width + "w " + optimalSize.height + "h");

parameters.setPreviewSize(optimalSize.width, optimalSize.height);

// parameters.setPreviewSize(width, height);

camera.setParameters(parameters);

camera.startPreview();

}

};