我想只显示小数点后两位,但是尝试了很多方法仍然会得到很多小数位:
itemamount = Double.parseDouble(text_cost_code.getText().toString());
txt_total.setText(new DecimalFormat("##.##").format(itemamount));
edit_qty_code.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
if (!edit_qty_code.getText().toString().equals("")
|| !edit_qty_code.getText().toString().equals("")) {
itemquantity = Double.parseDouble(edit_qty_code.getText().toString());
itemamount = Double.parseDouble(text_cost_code.getText().toString());
txt_total.setText(new DecimalFormat("##.##").format (itemquantity * itemamount));
} else { txt_total.setText("0.00");}}