Open android gallery from an html

Good morning everyone.

I'm trying to open the Android gallery from a .html that I have in the assets folder. This .html I open from a webView and everything works great except for a button that should open the file browser but does not do anything though if that .html file is opened in a PC browser if I open the file browser.

I do not know if I've explained myself well, if I have not done it, say it and I try to explain it in a different way >. < '

This is the code I use:

       function(editor) {

        function openGallery() {
            var input = $(document.createElement('input'));
            input.attr("type", "file");
            input.attr("accept", "image/*");
            input.trigger('click'); // opening dialog
            return false;
        }

        editor.addButton('openGallery', {
          icon: 'insertdatetime',
          //image: 'http://p.yusukekamiyamane.com/icons/search/fugue/icons/calendar-blue.png',
          tooltip: "Insert image",
          onclick: openGallery
        });
    }

That what it does is add a button to a file editor with the functionality of opening the file browser, in PC it opens it but in Android it does not do anything to me.