当我点击按钮？在编辑文本中插入的值应该是总计和计算以显示在另一个编辑文本中，帮助选择查询？

Question

PaymentPaid(editText) 中插入的所有值都应该是总和并显示到 totalamt(Edittext)。 '

Next.setOnClickListener(new View.OnClickListener() {

    public void onClick(View arg0) {

    try {

                String sql= Select-------?
        String amntpaid=PaymentPaid.getText().toString();       
        String totamnt=totalamt.getText().toString();
                }
                catch (Exception e) {
                e.printStackTrace();
                }
                }
            });`

Answer 1

试试这个......

 int subtotal = 0;
 int total =0;
 Cursor  cursor = dh.rawQuery("SELECT _column_name FROM table_name WHERE _column_name LIKE ? ", new String[] {"%"});
if(cursor.moveToFirst())   
            do{

    subtotal = cursor.getInt(cursor.getColumnIndex("_column_name"));
                total = total+subtotal;
            }while(cursor.moveToNext());
     total_show_edttxt.setext(total);