public void setShowProgressBar(boolean showProgressBar) {
    if (mShowProgressBar != showProgressBar) {
      mShowProgressBar = showProgressBar;
      setProgressBarVisibility();
    }
  }
if to show progress bar when image async loading/cropping is in progress.<br>
default: true, disable to provide custom progress bar UI.
core/src/main/java/com/theartofdev/edmodo/cropper/CropImageView.java