Android Question Does Webview have a writable cache

I am using webview to display a received email but can't get the imbedded images to display.
I have saved the HTML body of the email into a file in my Temp_Folder.
I have decoded and saved all attachments into the same Temp_Folder using their original names given in the email.
I tried opening the HTML file using

dim HTMLview as WebView
HTMLview.Loadurl("file://" & Temp_Folder & "/HTMLview.html")

I get the html text displayed perfect with all formatting.
But the image objects are shown as blank rectangles containing (?).

Does Webview have a Cache?
Can I write my files into it?
Can I direct WebView to my Temp_Folder?

Any help, please?