Question

我让用户将他们的身高和体重输入EditText，然后计算他们的BMI。我正在尝试将EditText转换为int，以便我可以进行计算。

 EditText userHeight = FindViewById<EditText>(Resource.Id.editTextHeight);
 EditText userWeight = FindViewById<EditText>(Resource.Id.editTextWeight);


 int intuserweight = Convert.ToInt32(userWeight.Text);
 intuserweight = int.Parse(userWeight.Text);

 int intuserheight = Int32.Parse(userHeight.Text);

我已经尝试了两次转化，并且都说明了System.FormatException: Input string was not in a correct format。

编辑Enter Intake Class的完整代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;

namespace AndroidDoctorApp
 {
[Activity(Label = "Enter Intake")]
public class EnterIntake : Activity
{
    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);

        // Create your application here

        SetContentView(Resource.Layout.EnterIntake);



        EditText userDate = FindViewById<EditText>(Resource.Id.editTextDate);
        EditText userTime = FindViewById<EditText>(Resource.Id.editTextTime);
        EditText userHeight = FindViewById<EditText>(Resource.Id.editTextHeight);
        EditText userWeight = FindViewById<EditText>(Resource.Id.editTextWeight);

        Button btnBMI = FindViewById<Button>(Resource.Id.btnCalcBMI);
        Button btnAddHistory = FindViewById<Button>(Resource.Id.buttonAddHistory);
        Button btnViewHistory = FindViewById<Button>(Resource.Id.buttonViewHistory);




        int bmi;
        int intuserweight = int.Parse(userWeight.Text.ToString());
       // intuserweight = int.Parse(userWeight.Text);


        int intuserheight = Int32.Parse(userHeight.Text);

        bmi = intuserweight / (intuserheight * intuserheight);


        btnBMI.Click += (object sender, EventArgs e) =>
        {

            string toast = string.Format("Your BMI is:  ", bmi);
            Toast.MakeText(this, toast, ToastLength.Long).Show();


        };



        btnAddHistory.Click += (object sender, EventArgs e) =>
        {

            string toast = string.Format("BMI Added to History ");
            Toast.MakeText(this, toast, ToastLength.Long).Show();

        };


    }
}

}

Answer 1

使用此：

int userweight = int.Parse(userWeight.getText().toString());

编辑 int bmi; int intuserweight; int intuserheight;

    btnBMI.Click += (object sender, EventArgs e) =>
    {
       intuserweight = int.Parse(userWeight.Text.ToString());
       intuserheight = int.Parse(userHeight.Text.ToString());

    bmi = intuserweight / (intuserheight * intuserheight);
        string toast = string.Format("Your BMI is:  ", bmi);
        Toast.MakeText(this, toast, ToastLength.Long).Show();
    };

试试这个。很抱歉任何语法错误（如果有的话），因为我是一个在C＃中不多的Java人。并且不要忘记告诉它是否有效。

Answer 2

你尝试类似

的东西

int user_Weight=Integer.parseInt(userheight.gettext().toString());

将EditText转换为Int

2 个答案: