A small port of the BlockPane/blocks preview from Sketchware. See the class BlockPreviewer.java.
It is read-only (hence "preview") so you can't drag-drop blocks around, although that should be trivial to port also. One would just need to port over part of the onTouch event from LogicEditorActivity. PRs are welcome.
It has no external dependencies, not even AndroidX. I only included Gson to load some dummy block data for preview. Refer to MainActivity.java for example usage.
Here.
