webView.addJavascriptInterface(new Dialogs(context), "Dialogs");
Dialogs.getFileFromDialog(new setOnSelectedFromDialog() {
                @Override
                public void onFromDialogSelected(File file, String path) {
                    Dialogs.SysToast(file.toString());
                }
            });

Dialogs.getFileFromDialog(function (file, path) {
        /* file, path*/
    });