How to upload multiple files on Android using the multiple property?

I've hit the same brick wall. I've tried a number of mobile browsers and can't find any that work.

I found this link that tells you that none of the Android browsers support this:http://caniuse.com/#feat=input-file-multiple

From extensive searching, I've seen information that suggests that Chromium supports this (but no beta yet) and it should make it into Chrome for Android but no indication of time-frame.

This seems to have changed since my last answer. If you now look at:http://caniuse.com/#feat=input-file-multiple

You'll now see that Chrome 42 (or better) for Android does now support multiple file upload provided you're running Android 5.0 or better. That's quite a limitation but at least it's an improvement. As Android 5 (Lollipop) gains market share (18.1% in August 2015) this become more practical.

Here's one trick. Hit your normal <input type='file' multiple> button. File picker appears: do a long press on a file to select it, then select other files.On the top bar an "Open" appears, select it and then multiple files are added to the files collection.Kudos to Simon@atp for this.

However, not all available file pickers may work.