问自定义相机问题

EN

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    Camera.Size previewSize = determinePreviewSize(true, width, height);
    Camera.Parameters parameters = camera.getParameters();

    camera.setDisplayOrientation(90);


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


    List<Camera.Size> sizes = parameters.getSupportedPictureSizes();
    Camera.Size size = sizes.get(0);
    for (int i = 0; i < sizes.size(); i++) {
        if (sizes.get(i).width > size.width)
            size = sizes.get(i);
    }

    parameters.setPictureSize(size.width,size.height);

    parameters.set("display_mode","portrait");
    camera.setParameters(parameters);
    camera.startPreview();
}