Similar to this question, I'm trying to change parameters of the android camera after calling startPreview(). I'm processing video input frame by frame from the preview and need to adjust exposure settings in real time. lock() doesn't seem to be helpful and stopping the preview doesn't work at frame rate. However, just like the linked question has pointed out, once startPreview() is called, none of the param changes seem to go through to the camera.
In case it's relevant, I'm doing this on Google Glass... but that shouldn't make a difference.
