For the assignment , I did the following changes:

1. I used one image to be the background of TextView like "MON" , by the following code:
   
   background:
   

before:

after:

2. I changed the icon that required by changing those code:
   
   this is what I choosed:
   

3. I added a imagebutton to refresh the data that required. I used the icon that android stdio are loaded and changed the background color of it, which looks like that:
   
   the code is following:
   
   The function btnRefresh() is the function that refresh the data. And the code is following:
   public void btnRefresh(View view) {
   new DownloadUpdate().execute();//update the temperature
   myUploadData();// update the date information
   }

   private void myUploadData() {
   Calendar c = Calendar.getInstance();
   int year = c.get(Calendar.YEAR);//get year
   int month = c.get(Calendar.MONTH)+1;//get month
   int day = c.get(Calendar.DAY_OF_MONTH);//get day
   //get
   String mWay = String.valueOf(c.get(Calendar.DAY_OF_WEEK));
   if("1".equals(mWay)){
   mWay ="SUNDAY";
   }else if("2".equals(mWay)){
   mWay ="MONDAY";
   }else if("3".equals(mWay)){
   mWay ="TUESDAY";
   }else if("4".equals(mWay)){
   mWay ="WEDNESDAY";
   }else if("5".equals(mWay)){
   mWay ="THURSDAY";
   }else if("6".equals(mWay)){
   mWay ="FRIDAY";
   }else if("7".equals(mWay)){
   mWay ="SATURDAY";
   }
   String date = null;
   if(day>9&&month>9) {
   date = Integer.toString(month) + '/' + Integer.toString(day) + '/' + Integer.toString(year);
   }
   else if(day<10&&month>9){
   date = Integer.toString(month) + '/' + '0'+Integer.toString(day) + '/' + Integer.toString(year);
   }
   else if(month<10&&day>9){
   date ='0' + Integer.toString(month) + '/' +Integer.toString(day) + '/' + Integer.toString(year);
   }
   else{
   date ='0' + Integer.toString(month) + '/' +'0'+Integer.toString(day) + '/' + Integer.toString(year);
   }
   ((TextView) findViewById(R.id.head_date)).setText(mWay);
   ((TextView) findViewById(R.id.tv_date)).setText(date);

   }
   this the before I pressed the imgbutton:
   

and this is after:

If there are some bugs that I don't find out please tell me, thank you.
Yori
杨译绗
20151639