Greetings to all, I tell you what is going on with me. Resolved that I am developing an apk to access a web site, everything went perfect, but within this site there are files to download in multiple formats, including pdf and it turns out that it does not work the download manager of mobile, I can access to other links without a problem, but to access the download link of any file that is inside the page itself does not work.
My question is, is There any function or workaround to perform the task that I am concerned with?
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It's not there
I already have the extension but I don't know how to use it for that I download some file with the web viewer
Please read this for using the extension
http://ai2.appinventor.mit.edu/reference/other/extensions.html
Forgiveness does not explain to me well, I have the extension installed, but what is not is how to put in the blocks of the program for me to download a file inside webview
I have a same issues.
Webpage from that converted into Apk, PDF link does not open.
jpg file link is opened without a problem, but PDF link is not opened.
How to fix it?
Please explain what you are trying to achieve...show your relevant blocks
For example , below website.
http://bunka-s-pro.jp/pdf/
We can visit the website and we can download PDF catalog.
But when I converted this site into apkl with webviewer, I can click the PDF link but I can not see (download) pdf file.
The built-in webviewer is not connected to the android file system, you will not be able to "download" pdfs.
You can try the Custom Webview extension which provides a method for downloading files.
Additionally if you use beta version then you will get much more options. 
It provides a different extension named DownloadHelper.
Hi, vknow360
Could you guide me which block I can use to open PDF file which is built-in webviewer ?
What I want is to open PDF file from android app (created by MIT2 with webviewer).
WebViewer.GoToUrl(file://+pdf_path)