public void start(@NonNull Activity activity, @Nullable Class<?> cls) {
      mOptions.validate();
      activity.startActivityForResult(getIntent(activity, cls), CROP_IMAGE_ACTIVITY_REQUEST_CODE);
    }
Start {@link CropImageActivity}.

@param activity activity to receive result
core/src/main/java/com/theartofdev/edmodo/cropper/CropImage.java