Question

我的问题是：我在public static string toFraction(string exp) { double x = Convert.ToDouble(exp); int sign = (Math.Abs(x) == x) ? 1 : -1; x = Math.Abs(x); int n = (int)x; // integer part x -= n; // fractional part int mult, nm, dm; int decCount = 0; Match m = Regex.Match(Convert.ToString(x), @"([0-9]+?)\1+.?$"); // repeating fraction if (m.Success) { m = Regex.Match(m.Value, @"([0-9]+?)(?=\1)"); mult = (int)Math.Pow(10, m.Length); // We have our basic fraction nm = (int)Math.Round(((x * mult) - x)); dm = mult - 1; } // get the number of decimal places else { double t = x; while (t != 0) { decCount++; t *= 10; t -= (int)t; } mult = (int)Math.Pow(10, decCount); // We have our basic fraction nm = (int)((x * mult)); dm = mult; } // can't be simplified if (nm < 0 || dm < 0) return exp; //Simplify Stack factors = new Stack(); for (int i = 2; i < nm + 1; i++) { if (nm % i == 0) factors.Push(i); // i is a factor of the numerator } // check against the denominator, stopping at the highest match while(factors.Count != 0) { // we have a common factor if (dm % (int)factors.Peek() == 0) { int f = (int)factors.Pop(); nm /= f; dm /= f; break; } else factors.Pop(); } nm += (n * dm); nm *= sign; if (dm == 1) return Convert.ToString(nm); else return Convert.ToString(nm) + "/" + Convert.ToString(dm); }上有LoadTaskList()功能，但在CustomAdapter中我调用了MainActivity但它没有激活

CustomAdapter.cs

LoadTaskList()

MainActivity.cs

       public override View GetView(int position, View convertView, ViewGroup parent)
        {
            LayoutInflater inflater = (LayoutInflater)mainActivity.GetSystemService(Context.LayoutInflaterService);
            View view = inflater.Inflate(Resource.Layout.row, null);

            TextView txtTask = view.FindViewById<TextView>(Resource.Id.task_title);
            Button btnDelete = view.FindViewById<Button>(Resource.Id.btnDelete);


            txtTask.Text = taskList[position];

            btnDelete.Click += delegate {
                string task = taskList[position];
                dbHelper.deleteTask(task);

                mainActivity.LoadTaskList(); // here
            };
            return view;
        }

Answer 1

解决了！

只需将LoadTaskList（）更改为public并从CustomAdapter

调用它

从另一个类调用函数

1 个答案: