public void setOnSetImageUriCompleteListener(OnSetImageUriCompleteListener listener) {
    mOnSetImageUriCompleteListener = listener;
  }
Set the callback to be invoked when image async loading ({@link #setImageUriAsync(Uri)}) is
complete (successful or failed).
core/src/main/java/com/theartofdev/edmodo/cropper/CropImageView.java