public synchronized void zoomOut() {
if (mCamera != null
&& mCamera.getParameters().isZoomSupported()
&& mCamera.getParameters().isSmoothZoomSupported()
&& !zooming) {
int zoomvalue = mCamera.getParameters().getZoom() - zoomOffset;
if (zoomvalue >= 0) {
mCamera.startSmoothZoom(zoomvalue);
}
}
}
@Override
public void startSmoothZoom(int value) {
camera.startSmoothZoom(value);
}