public void setMultiTouchEnabled(boolean multiTouchEnabled) {
    if (mCropOverlayView.setMultiTouchEnabled(multiTouchEnabled)) {
      handleCropWindowChanged(false, false);
      mCropOverlayView.invalidate();
    }
  }
Set multi touch functionality to enabled/disabled.
core/src/main/java/com/theartofdev/edmodo/cropper/CropImageView.java