private void startAutofocus() {
if (isHaveAutoFocus()) {
autoFocusHandler.postDelayed(runAutoFocus, AUTOFOCUS_REFRESH_DELAY);
cameraView.getCamera().autoFocus(autoFocusCallback);
}
}
private void stopAutofocus() {
if (isHaveAutoFocus() && cameraView.getCamera() != null) {
autoFocusHandler.removeCallbacks(runAutoFocus);
cameraView.getCamera().cancelAutoFocus();
}
}