String updateTime=fommatTime(productCostAndDetail.get("update_time").toString());
private String fommatTime(String value) {
String year = value.substring(0, 4);
String month = value.substring(5, 7);
String day = value.substring(8, 10);
String hour = value.substring(11, 13);
String min = value.substring(14, 16);
String second=value.substring(17, 19);
return year + "-" + month + "-" + day + " "+hour + ":" + min + ":"+second;
}