void onTakePictureClick() {
PictureOptions options = new PictureOptions(25);
options.setDestinationType(PictureOptions.DESTINATION_TYPE_DATA_URL);
options.setSourceType(PictureOptions.PICTURE_SOURCE_TYPE_CAMERA);
camera.getPicture(options, new PictureCallback() {
@Override
public void onSuccess(String data) {
image.setUrl(UriUtils.fromSafeConstant("data:image/jpeg;base64," + data));
}