Android如何使用while循环更新列表项？

Question

I have a list in witch I have only money amounts (numbers), then I want to create a while loop to pull each item in the list (or amount) to be able to do a calculation like adding the tax to the amount and inserting this new amounts to another list in the same order as the original list.

this is my code:

final ArrayList<Double> individuallist = new ArrayList<Double>();
final ArrayAdapter<Double> bb;
bb = new ArrayAdapter<Double>(this,android.R.layout.simple_list_item_1 ,individuallist);
listView.setAdapter(bb);

//button Next

    Button next = (Button) findViewById(R.id.btnnext);
    next.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            counter2 = itotal;
            individuallist.add(0, counter2);
            bb.notifyDataSetChanged();
            item1.setText("0");

        }
    });    

the itotal comes from a edit text view

so I have another button where I want to create a click event to do the while loop so I can add tax to every amount place the result in another list in the same order and display it in a second list view, so I don't modify the first list items so I can change the tax rate later and be able to modify the second list every time the second button is press and display the second list updated.

Thanks

Answer 1

you can do this easily using for loop like this

for(int i=0;i<alist.size();i++)
{

  int amount=alist.get(i);
  int taxadded=//caclutaions on amount;
  anotherlist.add(taxadded);
}