CustomWebView and attempt to open download

MIT App Inventor Help
10

Sorry, I only can upload the aia file.
Download_and_Read_PDF.aia (102.2 KB)
I add a link to the apk:
https://drive.google.com/file/d/1P6DSfMITdy1F_6w3Io455VCukt5WLnzZ/view?usp=sharing

SAF: App Inventor implementation of Storage Access Framework