How to overlap navigator .notification.prompt over camera in cordova

My app has a barcode scanner. I am using this plugin to be exact.

I need the tooltip to appear over the top of the scanner when scanning a barcode. similar to the downloadable version of manatee in googleplay. I will ask the user to enter a quantity.

I have already commented

finishing ();

in scannerActivity.java's handleDecode function so the scanner doesn't close when it scanned something, but I tried

navigator.notification.alert(result.code, function(){}, result.type, 'Close');

      

        
        
        
      

    

and

alert('normal alert');

      

        
        
        
      

    

and

navigator.notification.prompt(
            'notification prompt',  // message
            onPrompt,                  // callback to invoke
            'Registration',            // title
            ['Ok','Exit'],             // buttonLabels
            'Jane Doe'                 // defaultText
            );

      

        
        
        
      

    

and

navigator.notification.confirm(
            ' notifcation confirm', // message
             onConfirm,            // callback to invoke with index of button pressed
            'Game Over',           // title
            ['Restart','Exit']     // buttonLabels
        );

      

        
        
        
      

    

They all work, but they don't appear on top of the scanner. I only see them when I exit the scanner.