Add a button to save the picture in AIR or AS3

问题

I have a file attachment here.

I tried I try to add a button for interface to download the image in the phone folder in AIR or AS3 Or make a photo wallPaper for phon. Can anyone help me?? And experience it in the attached file .

来源：https://stackoverflow.com/questions/29915396/add-a-button-to-save-the-picture-in-air-or-as3