Android : Custom Notification (From New item -url json ) Android

Read URL json Link and send notification if already not send http://mobile.com/json.json

{"widget": {
    "image": { 
        "src": "Images/Sun.png",
        "name": "sun1",
        "url": "http://newip.com",
        "comment": "New Update Result",
        "Added": "29/09/2014"
    },
}}  

And Detect New Item from json

and send notification

and if notification not open after 15min close automaticaly