با سلام
استاد چرا موقع استفاده از spinner این خطا رو میده؟
using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using System.Collections.Generic;
namespace MyFirstApp
{
[Activity(Label = "MyFirstApp", MainLauncher = true, Icon = "@drawable/icon")]
public class MainActivity : Activity
{
//int count = 1;
private EditText txtName;
private Button btnShow;
private Button btnChange;
private EditText txtPlain;
private Spinner spinner;
private List<string> items;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
// Get our button from the layout resource,
// and attach an event to it
//Button button = FindViewById<Button>(Resource.Id.MyButton);
//button.Click += delegate { button.Text = string.Format("{0} clicks!", count++); };
//txtName = FindViewById<EditText>(Resource.Id.txtName);
//btnShow = FindViewById<Button>(Resource.Id.btnShow);
//btnShow.Click += BtnShow_Click;
btnChange = FindViewById<Button>(Resource.Id.btnActivity);
spinner = FindViewById<Spinner>(Resource.Id.spinner1);
addItems();
spinner.Adapter = new ArrayAdapter(this,Android.Resource.Layout.SimpleSpinnerItem,items);
btnChange.Click += BtnChange_Click;
txtPlain = FindViewById<EditText>(Resource.Id.txtPlain);
}
void addItems()
{
items=new List<string>();
items.Add(" لطفا انتخاب کنید");
items.Add("سیب");
items.Add("لبنیات");
items.Add("سبد کالا");
items.Add("هندونه");
}
private void BtnChange_Click(object sender, EventArgs e)
{
//StartActivity(typeof(ChangeActivity));
Android.Content.Intent myIntent = new Intent(this, typeof(ChangeActivity));
myIntent.PutExtra("MyParameters", txtPlain.Text);
StartActivity(myIntent);
}
//private void BtnShow_Click(object sender,EventArgs e)
//{
// if (txtName.Text != "")
// {
// Toast.MakeText(this, "Hello " +txtName.Text,ToastLength.Long).Show();
// }
//}
}
}
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