HTML File Upload Doesn't Show Gallery on Android
Try to use <input name="userfile" type="file" accept="image/*" />
instead of <input name="userfile" type="file" accept="images/*" />.
It works for me.
I found a solution on my Android-Device. Google Chrome had not the right to access the Gallery (Files and Media). If you turn it through Settings->Apps->Chrome on, it works quite well.
I know it's an old thread, but I hope my answer helps others out of the struggle.